/* roulang page: index */
:root {
    --bg-primary: #0A0E17;
    --bg-secondary: #111827;
    --bg-card: rgba(255, 255, 255, 0.05);
    --primary: #2E7CF6;
    --accent: #00E5A0;
    --warning: #FF8A4C;
    --text-primary: #E5EDFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-light: rgba(255, 255, 255, 0.08);
    --border-mid: rgba(255, 255, 255, 0.14);
    --radius-lg: 16px;
    --radius-md: 10px;
    --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 8px 30px rgba(46, 124, 246, 0.15);
    --gradient-cta: linear-gradient(135deg, #2E7CF6 0%, #00E5A0 100%);
    --font-sans: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at 15% 0%, rgba(46, 124, 246, 0.15) 0%, transparent 55%),
        radial-gradient(ellipse at 85% 10%, rgba(0, 229, 160, 0.07) 0%, transparent 45%),
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
    color: var(--text-primary);
    line-height: 1.7;
    font-variant-numeric: tabular-nums;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s ease;
}
img {
    max-width: 100%;
    display: block;
}
button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }
}
.section {
    padding: 72px 0;
    position: relative;
}
@media (max-width: 768px) {
    .section {
        padding: 48px 0;
    }
}
.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
}
.section-head.left {
    text-align: left;
    margin: 0 0 32px;
}
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 14px;
    border-radius: 999px;
    background: rgba(46, 124, 246, 0.12);
    border: 1px solid rgba(46, 124, 246, 0.3);
    color: #7EA8FF;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 14px;
}
.section-tag::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(0, 229, 160, 0.6);
}
.section h2 {
    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
    color: var(--text-primary);
}
@media (max-width: 768px) {
    .section h2 {
        font-size: 24px;
    }
}
.section .sub {
    margin-top: 12px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}
/* ===== Header / Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.78);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 12px;
    padding-bottom: 12px;
    flex-wrap: wrap;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--gradient-cta);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 18px rgba(0, 229, 160, 0.25);
}
.logo-icon svg {
    width: 20px;
    height: 20px;
    stroke: #0A0E17;
    stroke-width: 2.5;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 0.01em;
    white-space: nowrap;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: 999px;
    overflow-x: auto;
    scrollbar-width: none;
    max-width: 100%;
}
.main-nav::-webkit-scrollbar {
    display: none;
}
.nav-tab {
    display: inline-block;
    padding: 7px 18px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(229, 237, 255, 0.6);
    white-space: nowrap;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}
.nav-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.07);
}
.nav-tab.active {
    background: var(--gradient-cta);
    color: #08223b;
    font-weight: 600;
    box-shadow: 0 0 22px rgba(0, 229, 160, 0.25);
}
.nav-cta {
    flex-shrink: 0;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 26px;
    border: none;
    border-radius: 999px;
    background: var(--gradient-cta);
    color: #0A0E17;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: 0 4px 18px rgba(46, 124, 246, 0.2);
}
.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 28px rgba(0, 229, 160, 0.35);
    transform: translateY(-2px);
    color: #0A0E17;
    text-decoration: none;
}
.btn-primary:active {
    transform: scale(0.97);
}
.btn-primary:focus-visible,
.nav-tab:focus-visible,
.back-top:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 26px;
    border-radius: 999px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 16px rgba(0, 229, 160, 0.15);
    transform: translateY(-2px);
    text-decoration: none;
}
@media (max-width: 768px) {
    .nav-container {
        padding-top: 10px;
        padding-bottom: 10px;
        gap: 8px;
    }
    .main-nav {
        order: 3;
        width: 100%;
        padding: 3px;
    }
    .nav-tab {
        padding: 6px 14px;
        font-size: 13px;
    }
    .nav-cta .cta-text {
        display: none;
    }
    .nav-cta {
        padding: 10px;
        border-radius: 12px;
        width: 40px;
        height: 40px;
    }
    .logo-icon {
        width: 34px;
        height: 34px;
    }
    .logo-text {
        font-size: 18px;
    }
}
@media (max-width: 520px) {
    .nav-tab {
        padding: 6px 12px;
        font-size: 13px;
    }
}
/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 72vh;
    display: flex;
    align-items: center;
    padding: 48px 0 56px;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 75% 30%, rgba(46, 124, 246, 0.18) 0%, transparent 45%),
        radial-gradient(circle at 20% 80%, rgba(0, 229, 160, 0.1) 0%, transparent 35%);
    pointer-events: none;
}
.scan-line {
    position: absolute;
    top: -5%;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.5), transparent);
    animation: scanMove 6s linear infinite;
    pointer-events: none;
    z-index: 1;
}
@keyframes scanMove {
    0% {
        top: -5%;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        top: 105%;
        opacity: 0;
    }
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: center;
    position: relative;
    z-index: 2;
}
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .hero {
        min-height: auto;
        padding-top: 32px;
    }
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(0, 229, 160, 0.08);
    border: 1px solid rgba(0, 229, 160, 0.25);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}
.hero-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(0, 229, 160, 0.7);
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}
.hero h1 {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 18px;
}
@media (max-width: 768px) {
    .hero h1 {
        font-size: 30px;
    }
}
.hero h1 .highlight {
    background: var(--gradient-cta);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-sub {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 480px;
    margin-bottom: 30px;
}
.hero-cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border-top: 1px solid var(--border-light);
    padding-top: 24px;
}
@media (max-width: 520px) {
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 16px;
    }
}
.hero-stats > div {
    padding: 0 12px;
    border-right: 1px solid var(--border-light);
    text-align: center;
}
.hero-stats > div:first-child {
    padding-left: 0;
    text-align: left;
}
.hero-stats > div:last-child {
    border-right: none;
    padding-right: 0;
}
@media (max-width: 520px) {
    .hero-stats > div {
        padding: 0 8px;
        text-align: left;
    }
    .hero-stats > div:first-child {
        padding-left: 0;
    }
}
.hero-stats strong {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
    text-shadow: 0 0 20px rgba(0, 229, 160, 0.2);
}
@media (max-width: 520px) {
    .hero-stats strong {
        font-size: 24px;
    }
}
.hero-stats p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}
/* Hero visual */
.hero-visual {
    position: relative;
    border-radius: 24px;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    min-height: 440px;
    border: 1px solid var(--border-mid);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 24px;
}
@media (max-width: 768px) {
    .hero-visual {
        min-height: 340px;
    }
}
.hero-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 14, 23, 0.2) 0%, rgba(10, 14, 23, 0.85) 100%);
    z-index: 1;
}
.float-card {
    position: absolute;
    z-index: 2;
    background: rgba(17, 24, 39, 0.72);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 14px;
    padding: 14px 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
.fc-1 {
    top: 32px;
    right: 28px;
    min-width: 210px;
    animation: floatY 3s ease-in-out infinite;
}
.fc-2 {
    bottom: 32px;
    left: 24px;
    min-width: 180px;
    animation: floatY 3s ease-in-out 1.5s infinite;
}
@keyframes floatY {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}
.fc-top {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}
.fc-live-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #F43F5E;
    box-shadow: 0 0 10px rgba(244, 63, 94, 0.6);
    animation: pulse-dot 1.2s ease-in-out infinite;
}
.fc-top span {
    font-size: 12px;
    color: var(--text-secondary);
}
.fc-top .fc-time {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 11px;
}
.fc-match {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 10px;
}
.fc-match > div {
    display: flex;
    align-items: center;
    gap: 8px;
}
.fc-team {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}
.fc-match strong {
    font-size: 22px;
    font-weight: 800;
    color: var(--accent);
}
.fc-bottom {
    font-size: 12px;
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 8px;
}
.fc-update {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}
.fc-update-icon {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(0, 229, 160, 0.6);
}
.fc-update span {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
}
.fc-2 p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}
/* ===== Matrix ===== */
.matrix-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
@media (max-width: 900px) {
    .matrix-grid {
        grid-template-columns: 1fr;
    }
}
.matrix-card {
    background: rgba(255, 255, 255, 0.045);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: relative;
    overflow: hidden;
    transition: all 0.35s ease;
}
.matrix-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 1px;
    background: rgba(255, 255, 255, 0.6);
    opacity: 0.6;
    transition: all 0.3s ease;
}
.matrix-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-glow);
}
.matrix-card:hover::before {
    width: 100%;
}
.matrix-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(46, 124, 246, 0.14);
    border: 1px solid rgba(46, 124, 246, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}
.matrix-icon svg {
    width: 24px;
    height: 24px;
    stroke: #6FA0FF;
    stroke-width: 1.6;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.matrix-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 14px;
}
.matrix-list {
    list-style: none;
    margin: 0 0 18px;
    padding: 0;
}
.matrix-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}
.matrix-list li:last-child {
    border-bottom: none;
}
.matrix-list li a {
    display: block;
    color: var(--text-secondary);
}
.matrix-list li a:hover {
    color: var(--accent);
}
.matrix-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #7EA8FF;
    transition: all 0.2s ease;
}
.matrix-more:hover {
    color: var(--accent);
    gap: 10px;
}
/* ===== Stats ===== */
.stats-panel {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}
@media (max-width: 768px) {
    .stats-panel {
        grid-template-columns: repeat(2, 1fr);
    }
}
.stats-panel > div {
    padding: 36px 24px;
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: none;
    position: relative;
}
.stats-panel > div:last-child {
    border-right: none;
}
@media (max-width: 768px) {
    .stats-panel > div:nth-child(2) {
        border-right: none;
    }
    .stats-panel > div:nth-child(-n+2) {
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
}
.stats-panel strong {
    display: block;
    font-size: 44px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
    text-shadow: 0 0 30px rgba(0, 229, 160, 0.25);
    margin-bottom: 6px;
    font-variant-numeric: tabular-nums;
}
@media (max-width: 768px) {
    .stats-panel strong {
        font-size: 34px;
    }
}
.stats-panel span {
    font-size: 14px;
    color: var(--text-secondary);
}
.stat-glow {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 30px;
    background: rgba(0, 229, 160, 0.15);
    border-radius: 50%;
    filter: blur(16px);
    pointer-events: none;
}
/* ===== Topics Scroll ===== */
.topics-scroll {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding-bottom: 16px;
    padding-top: 4px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
    scroll-snap-type: x mandatory;
}
.topics-scroll::-webkit-scrollbar {
    height: 4px;
}
.topics-scroll::-webkit-scrollbar-track {
    background: transparent;
}
.topics-scroll::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
.topic-card {
    min-width: 340px;
    max-width: 380px;
    flex-shrink: 0;
    scroll-snap-align: start;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.35s ease;
    display: flex;
    flex-direction: column;
}
.topic-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5);
}
.topic-image {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.topic-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.topic-card:hover .topic-image img {
    transform: scale(1.05);
}
.topic-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(10, 14, 23, 0.75);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    z-index: 1;
}
.topic-tag.hot {
    background: rgba(255, 138, 76, 0.2);
    border-color: rgba(255, 138, 76, 0.4);
    color: #FFB089;
}
.topic-body {
    padding: 22px 22px 18px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.topic-body h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 10px;
}
.topic-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.topic-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.topic-meta time {
    font-size: 13px;
    color: var(--text-muted);
}
.topic-meta a {
    font-size: 14px;
    font-weight: 600;
    color: #7EA8FF;
    transition: color 0.2s ease;
}
.topic-meta a:hover {
    color: var(--accent);
}
/* ===== Latest List ===== */
.latest-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.latest-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}
.latest-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--gradient-cta);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.latest-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.16);
    transform: translateX(4px);
}
.latest-item:hover::before {
    opacity: 1;
}
.latest-link {
    display: grid;
    grid-template-columns: 160px 1fr auto;
    gap: 20px;
    padding: 20px 24px;
    align-items: center;
}
@media (max-width: 768px) {
    .latest-link {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 18px;
    }
}
.latest-left {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.latest-cat {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    padding: 3px 12px;
    border-radius: 999px;
    background: rgba(46, 124, 246, 0.12);
    border: 1px solid rgba(46, 124, 246, 0.25);
    color: #7EA8FF;
    font-size: 12px;
    font-weight: 600;
}
.latest-left time {
    font-size: 13px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}
.latest-center h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
    transition: color 0.2s ease;
}
.latest-center h3:hover {
    color: var(--accent);
}
.latest-center p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.latest-right {
    font-size: 14px;
    font-weight: 600;
    color: #7EA8FF;
    white-space: nowrap;
    transition: all 0.2s ease;
}
.latest-item:hover .latest-right {
    color: var(--accent);
}
.latest-empty {
    padding: 48px 24px;
    text-align: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px dashed rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    color: var(--text-secondary);
    font-size: 15px;
}
/* ===== Solution ===== */
.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
@media (max-width: 900px) {
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}
.solution-text h2 {
    margin-bottom: 16px;
}
.solution-text .desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}
.solution-points {
    list-style: none;
    margin: 0;
    padding: 0;
}
.solution-points li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-primary);
}
.solution-points li::before {
    content: "";
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(0, 229, 160, 0.15);
    border: 1px solid rgba(0, 229, 160, 0.4);
    position: relative;
    margin-top: 4px;
}
.solution-points li::after {
    content: "✓";
    position: absolute;
    margin-left: -20px;
    margin-top: 4px;
    font-size: 10px;
    color: var(--accent);
    font-weight: 700;
}
.solution-panel {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 32px;
    position: relative;
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.solution-panel::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 160px;
    height: 160px;
    background: radial-gradient(circle, rgba(46, 124, 246, 0.2) 0%, transparent 70%);
    pointer-events: none;
}
.panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.panel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px rgba(0, 229, 160, 0.6);
}
.panel-header span:last-child {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}
.flow-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.flow-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 12px;
    transition: all 0.3s ease;
}
.flow-step:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(0, 229, 160, 0.3);
}
.step-num {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--gradient-cta);
    color: #0A0E17;
    font-size: 13px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
}
.flow-step h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.flow-step p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}
.flow-arrow {
    text-align: center;
    font-size: 18px;
    color: var(--accent);
    line-height: 1;
    padding: 2px 0;
    opacity: 0.7;
}
/* ===== FAQ ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.faq-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    overflow: hidden;
    transition: all 0.3s ease;
}
.faq-item.active {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 229, 160, 0.25);
}
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 22px;
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.2s ease;
}
.faq-question:hover {
    color: var(--accent);
}
.faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--gradient-cta);
    color: #0A0E17;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    padding: 0 22px;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
}
.faq-answer p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 14px;
}
/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: start;
}
@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}
.contact-info h2 {
    margin-bottom: 14px;
}
.contact-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}
.contact-list {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
}
.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-primary);
}
.contact-list .label {
    color: var(--text-muted);
    font-size: 13px;
    width: 68px;
    flex-shrink: 0;
}
.contact-social {
    display: flex;
    gap: 12px;
}
.social-btn {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.social-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 16px rgba(0, 229, 160, 0.15);
    transform: translateY(-2px);
}
.social-btn svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-secondary);
    stroke-width: 1.6;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.social-btn:hover svg {
    stroke: var(--accent);
}
.contact-form-wrap {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-card);
}
@media (max-width: 520px) {
    .contact-form-wrap {
        padding: 24px;
    }
}
.form-group {
    margin-bottom: 18px;
}
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 7px;
}
.form-group label .required {
    color: var(--warning);
    margin-left: 2px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.25s ease;
    appearance: none;
    -webkit-appearance: none;
}
.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%2394A3B8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.15);
    background: rgba(255, 255, 255, 0.08);
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.form-submit {
    width: 100%;
    margin-top: 6px;
}
.form-tip {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 14px;
}
/* ===== Footer ===== */
.site-footer {
    background: rgba(7, 10, 16, 0.9);
    border-top: 1px solid var(--border-light);
    padding-top: 60px;
    position: relative;
}
.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.4), transparent);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
}
@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 520px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}
.footer-brand .logo {
    margin-bottom: 14px;
}
.footer-brand p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 260px;
}
.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    letter-spacing: 0.06em;
}
.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-col li {
    padding: 5px 0;
}
.footer-col a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color 0.2s ease;
}
.footer-col a:hover {
    color: var(--accent);
}
.footer-col p {
    font-size: 14px;
    color: var(--text-muted);
    padding: 5px 0;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 22px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}
.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}
/* ===== Back to top ===== */
.back-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 99;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}
.back-top:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 24px rgba(0, 229, 160, 0.2);
    transform: translateY(-3px);
}
.back-top svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}
/* ===== Misc ===== */
.glow-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px rgba(0, 229, 160, 0.6);
    pointer-events: none;
    z-index: 1;
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
}

/* roulang page: category1 */
/* ========== Design Tokens ========== */
        :root {
            --bg-deep: #0A0E17;
            --bg-sub: #111827;
            --bg-card: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(255, 255, 255, 0.08);
            --primary: #2E7CF6;
            --accent: #00E5A0;
            --warn: #FF8A4C;
            --text-main: #E5EDFF;
            --text-muted: #94A3B8;
            --text-faint: #64748B;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 8px 30px rgba(46, 124, 246, 0.15);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        /* ========== Reset / Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        /* ========== Background Layers ========== */
        .site-bg {
            position: relative;
            background:
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .site-bg::before {
            content: '';
            position: fixed;
            inset: 0;
            background: radial-gradient(600px 300px at 20% 20%, rgba(46, 124, 246, 0.15), transparent 60%),
                radial-gradient(500px 260px at 85% 0%, rgba(0, 229, 160, 0.10), transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(10, 14, 23, 0.75);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            height: 72px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.2);
        }

        .logo-icon svg {
            width: 22px;
            height: 22px;
            fill: #0A0E17;
        }

        .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #E5EDFF, #7FD4FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex: 1;
            justify-content: center;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 1.15rem;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.6);
            border: 1px solid transparent;
            white-space: nowrap;
            transition: var(--transition);
        }

        .nav-tab:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.08);
        }

        .nav-tab.active {
            color: #0A0E17;
            font-weight: 600;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.2);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }

        .cta-text {
            font-weight: 600;
        }

        .cta-icon {
            display: inline-flex;
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.6rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #0A0E17;
            box-shadow: 0 4px 14px rgba(46, 124, 246, 0.25);
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 24px rgba(0, 229, 160, 0.35);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-secondary {
            background: transparent;
            color: rgba(255, 255, 255, 0.85);
            border-color: rgba(255, 255, 255, 0.12);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.15);
        }

        .btn-secondary:active {
            transform: scale(0.97);
        }

        .nav-cta .btn-primary {
            padding: 0.55rem 1.25rem;
            font-size: 0.85rem;
        }

        /* ========== Hero Banner (Category) ========== */
        .category-hero {
            position: relative;
            padding: 5rem 0 4rem;
            background:
                linear-gradient(90deg, rgba(10, 14, 23, 0.92), rgba(10, 14, 23, 0.65)),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0.4;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.3rem 1rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--accent);
            border: 1px solid rgba(0, 229, 160, 0.25);
            background: rgba(0, 229, 160, 0.06);
            margin-bottom: 1.2rem;
            letter-spacing: 0.02em;
        }

        .category-hero h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        .category-hero .lead {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 2rem;
        }

        /* ========== Section ========== */
        .section {
            padding: 4.5rem 0;
            position: relative;
            z-index: 1;
        }

        .section-head {
            margin-bottom: 3rem;
        }

        .section-overline {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 0.8rem;
        }

        .section-overline::before {
            content: '';
            width: 24px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            display: inline-block;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 1rem;
        }

        .section-sub {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== Split Grid (Image + Text) ========== */
        .split-grid {
            display: grid;
            gap: 2rem;
        }

        .split-card {
            display: grid;
            grid-template-columns: 1fr;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            overflow: hidden;
            transition: var(--transition);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .split-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: var(--shadow-glow);
        }

        .split-card .media {
            position: relative;
            min-height: 240px;
            overflow: hidden;
        }

        .split-card .media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
            transition: transform 0.6s ease;
        }

        .split-card:hover .media img {
            transform: scale(1.03);
        }

        .split-card .media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(10, 14, 23, 0.35));
        }

        .split-card .body {
            padding: 1.8rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .split-card .body .card-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.8rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 229, 160, 0.08);
            border: 1px solid rgba(0, 229, 160, 0.15);
            margin-bottom: 0.8rem;
            width: fit-content;
        }

        .split-card .body h3 {
            font-size: 1.4rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 0.8rem;
        }

        .split-card .body p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.75;
            margin-bottom: 1.2rem;
        }

        .split-card .body ul {
            list-style: none;
            padding: 0;
            display: grid;
            gap: 0.5rem;
        }

        .split-card .body ul li {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.6;
        }

        .split-card .body ul li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            margin-top: 0.55rem;
            flex-shrink: 0;
        }

        @media (min-width: 768px) {
            .split-grid {
                gap: 3rem;
            }

            .split-card {
                grid-template-columns: 1fr 1fr;
            }

            .split-card:nth-child(even) .media {
                order: 2;
            }

            .split-card .media {
                min-height: 320px;
            }

            .split-card .body {
                padding: 2.5rem;
            }
        }

        /* ========== Scenario Strip ========== */
        .scenario-strip {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
            padding: 1.8rem;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(12px);
        }

        .scenario-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }

        .scenario-item .num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            font-variant-numeric: tabular-nums;
        }

        .scenario-item h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.25rem;
        }

        .scenario-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (min-width: 768px) {
            .scenario-strip {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 2rem;
                padding: 2.5rem;
            }
        }

        /* ========== Workflow / Info Path ========== */
        .workflow-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .workflow-card {
            padding: 1.8rem;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .workflow-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 100%;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            opacity: 0.6;
        }

        .workflow-card:hover {
            border-color: rgba(255, 255, 255, 0.18);
            transform: translateY(-3px);
        }

        .workflow-card .step {
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            color: var(--accent);
            margin-bottom: 0.5rem;
        }

        .workflow-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .workflow-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        @media (min-width: 768px) {
            .workflow-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 0.8rem;
        }

        .faq-item {
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
        }

        .faq-item.active {
            border-color: rgba(0, 229, 160, 0.3);
        }

        .faq-q {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1.2rem 1.4rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-main);
            user-select: none;
        }

        .faq-q .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #0A0E17;
            font-size: 1rem;
            font-weight: 700;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-arrow {
            margin-left: auto;
            font-size: 1.2rem;
            color: var(--text-faint);
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-arrow {
            color: var(--accent);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-a-inner {
            padding: 0 1.4rem 1.3rem;
            padding-left: calc(1.4rem + 28px + 1rem);
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }

        .cta-panel {
            border-radius: 24px;
            padding: 3rem 2rem;
            text-align: center;
            background:
                linear-gradient(135deg, rgba(46, 124, 246, 0.12), rgba(0, 229, 160, 0.08)),
                rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(16px);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -60%;
            left: 50%;
            width: 400px;
            height: 400px;
            transform: translateX(-50%);
            background: radial-gradient(circle, rgba(0, 229, 160, 0.08), transparent 70%);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            position: relative;
        }

        .cta-panel p {
            color: var(--text-muted);
            max-width: 480px;
            margin: 0 auto 1.8rem;
            font-size: 0.95rem;
            line-height: 1.8;
            position: relative;
        }

        .cta-panel .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            justify-content: center;
            position: relative;
        }

        /* ========== Footer ========== */
        .site-footer {
            position: relative;
            z-index: 1;
            background: rgba(10, 14, 23, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 4rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1.2fr;
                gap: 2rem;
            }
        }

        .footer-brand .logo {
            margin-bottom: 1rem;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-faint);
            line-height: 1.8;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.1rem;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            display: grid;
            gap: 0.6rem;
        }

        .footer-col ul a,
        .footer-col ul p {
            font-size: 0.88rem;
            color: var(--text-faint);
            line-height: 1.6;
        }

        .footer-col ul a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 1.6rem 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.4rem;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--text-faint);
        }

        @media (min-width: 768px) {
            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
            }
        }

        /* ========== Back to Top ========== */
        .back-to-top {
            position: fixed;
            right: 1.5rem;
            bottom: 1.5rem;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(12px);
            color: var(--text-muted);
            font-size: 1.1rem;
            z-index: 60;
            transition: var(--transition);
        }

        .back-to-top:hover {
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.2);
            transform: translateY(-3px);
        }

        /* ========== Scanline Effect ========== */
        .hero-scanline {
            position: absolute;
            left: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            animation: scan 6s ease-in-out infinite;
            opacity: 0.25;
            z-index: 1;
            pointer-events: none;
        }

        @keyframes scan {
            0% {
                top: 20%;
                opacity: 0.1;
            }
            50% {
                top: 80%;
                opacity: 0.3;
            }
            100% {
                top: 20%;
                opacity: 0.1;
            }
        }

        /* ========== Glow Dots ========== */
        .glow-dot {
            position: absolute;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px var(--accent);
            animation: pulse-dot 3s ease-in-out infinite;
            z-index: 0;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 0.3;
            }
            50% {
                opacity: 1;
            }
        }

        /* ========== Accessibility ========== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

        /* ========== Mobile Nav ========== */
        @media (max-width: 767px) {
            .main-nav {
                justify-content: flex-start;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
                padding: 0.3rem 0;
                gap: 0.35rem;
            }

            .main-nav::-webkit-scrollbar {
                display: none;
            }

            .nav-tab {
                padding: 0.4rem 0.9rem;
                font-size: 0.82rem;
                flex-shrink: 0;
            }

            .nav-cta .cta-text {
                display: none;
            }

            .nav-cta .btn-primary {
                padding: 0.55rem 0.7rem;
                border-radius: 50%;
                width: 38px;
                height: 38px;
            }

            .nav-cta .btn-primary .cta-icon {
                display: flex;
            }
        }

        @media (min-width: 768px) {
            .nav-cta .btn-primary .cta-icon {
                display: none;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --bg-primary: #0A0E17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.6);
    --primary: #2E7CF6;
    --accent: #00E5A0;
    --warning: #FF8A4C;
    --text-primary: #E5EDFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-light: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.2);
    --radius-card: 16px;
    --radius-inner: 12px;
    --radius-pill: 999px;
    --shadow-card: 0 8px 30px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 30px rgba(46,124,246,0.15);
    --glow-primary: 0 0 24px rgba(46,124,246,0.35);
    --glow-accent: 0 0 24px rgba(0,229,160,0.35);
    --trans-fast: 0.2s ease;
    --trans-med: 0.3s ease;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
::selection { background: rgba(0,229,160,0.2); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* ===== 背景装饰 ===== */
.bg-grid-overlay {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
}
.radial-glow-top {
    position: fixed;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 500px;
    background: radial-gradient(ellipse at center, rgba(46,124,246,0.12) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.glow-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
    opacity: 0.7;
    animation: pulseDot 3s ease-in-out infinite;
}
@keyframes pulseDot {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.5); }
}
.scan-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,229,160,0.35), transparent);
    animation: scanMove 6s linear infinite;
    pointer-events: none;
}
@keyframes scanMove {
    0% { top: 10%; }
    50% { top: 90%; }
    100% { top: 10%; }
}

/* ===== 玻璃卡 ===== */
.glass-card {
    background: rgba(17,24,39,0.55);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card);
    position: relative;
    transition: all var(--trans-med);
}
.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    right: 20px;
    height: 1px;
    background: rgba(255,255,255,0.12);
    border-radius: 999px;
}
.glass-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.6rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #0A0E17;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--trans-fast);
    box-shadow: 0 4px 16px rgba(46,124,246,0.25);
    white-space: nowrap;
}
.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: var(--glow-accent);
    transform: translateY(-1px);
}
.btn-primary:active { transform: scale(0.97); }
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.6rem;
    border-radius: var(--radius-pill);
    background: transparent;
    border: 1px solid rgba(255,255,255,0.14);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--trans-fast);
    cursor: pointer;
    white-space: nowrap;
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 16px rgba(0,229,160,0.15);
}

/* ===== 页头导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10,14,23,0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}
.nav-container {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 1.5rem;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
    flex-shrink: 0;
}
.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}
.logo-icon svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: #0A0E17;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.logo-text {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    white-space: nowrap;
}
.main-nav {
    display: flex;
    gap: 0.4rem;
    flex: 1;
    justify-content: center;
    overflow-x: auto;
    scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.nav-tab {
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    white-space: nowrap;
    transition: all var(--trans-fast);
    border: 1px solid transparent;
}
.nav-tab:hover {
    color: #fff;
    background: rgba(255,255,255,0.06);
}
.nav-tab.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #0A0E17;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(46,124,246,0.3);
}
.nav-cta {
    flex-shrink: 0;
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
    position: relative;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-light);
    background:
        linear-gradient(rgba(10,14,23,0.85), rgba(10,14,23,0.85)),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    z-index: 1;
}
.breadcrumb-bar .container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.breadcrumb-bar a {
    color: var(--text-secondary);
    transition: color var(--trans-fast);
}
.breadcrumb-bar a:hover { color: var(--accent); }
.breadcrumb-bar .sep { color: var(--text-muted); }
.breadcrumb-bar .current {
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 320px;
}

/* ===== 文章布局 ===== */
.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 2.5rem;
    padding-top: 2.5rem;
    padding-bottom: 3.5rem;
    position: relative;
    z-index: 1;
}
.article-main {
    min-width: 0;
}
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    position: relative;
}
.article-header {
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 1.8rem;
    margin-bottom: 1.8rem;
}
.article-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin: 0 0 1rem;
    color: var(--text-primary);
}
.article-summary {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0 0 1.2rem;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}
.meta-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
    margin-right: 0.3rem;
}
.article-hero-img {
    margin: 0 0 2rem;
    overflow: hidden;
    border-radius: 16px;
    position: relative;
}
.article-hero-img img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.article-hero-img:hover img { transform: scale(1.02); }
.article-hero-img figcaption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem 1.5rem 1rem;
    background: linear-gradient(transparent, rgba(10,14,23,0.85));
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
}

/* ===== 正文排版 ===== */
.article-content {
    font-size: 1.05rem;
    line-height: 1.85;
    color: #C7D2E8;
    word-break: break-word;
}
.article-content h2 {
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2.4rem 0 1rem;
    padding-left: 0.85rem;
    border-left: 4px solid var(--primary);
    line-height: 1.4;
}
.article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1.8rem 0 0.75rem;
}
.article-content p {
    margin: 1rem 0;
}
.article-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color var(--trans-fast);
}
.article-content a:hover { color: #fff; }
.article-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.85rem 1.25rem;
    margin: 1.6rem 0;
    background: rgba(0,229,160,0.06);
    border-radius: 0 12px 12px 0;
    color: var(--text-secondary);
}
.article-content img {
    border-radius: 16px;
    margin: 1.6rem 0;
    max-width: 100%;
    height: auto;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.6rem 0;
    font-size: 0.92rem;
    overflow: hidden;
    border-radius: 12px;
}
.article-content th {
    background: rgba(46,124,246,0.12);
    color: var(--text-primary);
    font-weight: 600;
    text-align: left;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
}
.article-content td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
}
.article-content ul,
.article-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}
.article-content ul li { list-style: disc; margin: 0.4rem 0; }
.article-content ol li { list-style: decimal; margin: 0.4rem 0; }
.article-content code {
    background: rgba(46,124,246,0.12);
    padding: 0.2rem 0.45rem;
    border-radius: 6px;
    font-size: 0.9em;
    color: var(--accent);
}
.article-content pre {
    background: #0D1117;
    border-radius: 12px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.6rem 0;
    border: 1px solid var(--border-light);
}
.article-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.9rem;
}

/* ===== 文末操作区 ===== */
.article-footer {
    border-top: 1px solid var(--border-light);
    margin-top: 2.5rem;
    padding-top: 1.8rem;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.4rem;
}
.tag {
    padding: 0.3rem 0.9rem;
    border-radius: var(--radius-pill);
    background: rgba(46,124,246,0.1);
    border: 1px solid rgba(46,124,246,0.25);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--trans-fast);
}
.tag:hover {
    background: rgba(46,124,246,0.2);
    color: #fff;
}
.share-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.4rem;
}
.share-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-right: 0.3rem;
}
.share-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--trans-fast);
}
.share-btn:hover {
    background: rgba(0,229,160,0.1);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}
.prev-next {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.4rem;
}
.prev-link,
.next-link {
    padding: 1rem 1.2rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--trans-fast);
    line-height: 1.5;
}
.prev-link:hover,
.next-link:hover {
    background: rgba(46,124,246,0.08);
    border-color: rgba(46,124,246,0.3);
    color: var(--text-primary);
}
.next-link { text-align: right; }
.article-back {
    display: flex;
    justify-content: center;
    margin-top: 0.5rem;
}

/* ===== 侧边栏 ===== */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: 92px;
    align-self: start;
    max-height: calc(100vh - 112px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.15) transparent;
}
.sidebar-box {
    padding: 1.4rem;
    position: relative;
}
.sidebar-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.sidebar-title::before {
    content: '';
    width: 3px;
    height: 16px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 2px;
}
.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.toc-list li a {
    display: block;
    padding: 0.45rem 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all var(--trans-fast);
    border-left: 2px solid transparent;
}
.toc-list li a:hover {
    color: var(--accent);
    background: rgba(0,229,160,0.05);
    border-left-color: var(--accent);
}
.hot-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}
.hot-list li {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-size: 0.88rem;
}
.hot-rank {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: rgba(255,255,255,0.06);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.hot-rank.rank-hot {
    background: rgba(255,138,76,0.15);
    color: var(--warning);
}
.hot-list li a {
    color: var(--text-secondary);
    transition: color var(--trans-fast);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.hot-list li a:hover { color: var(--text-primary); }
.ad-placeholder {
    padding: 1.4rem;
    text-align: center;
    background:
        radial-gradient(ellipse at center, rgba(46,124,246,0.08), transparent 70%),
        rgba(17,24,39,0.5);
    min-height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}
.ad-placeholder p {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}
.ad-placeholder span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== 相关推荐 ===== */
.related-section {
    position: relative;
    z-index: 1;
    padding: 3.5rem 0 4rem;
    border-top: 1px solid var(--border-light);
    background:
        linear-gradient(rgba(10,14,23,0.92), rgba(10,14,23,0.92)),
        url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.9rem;
    border-radius: var(--radius-pill);
    background: rgba(46,124,246,0.1);
    border: 1px solid rgba(46,124,246,0.25);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.9rem;
}
.section-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin: 0.4rem 0 2rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.related-card {
    background: rgba(17,24,39,0.6);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: all var(--trans-med);
    display: flex;
    flex-direction: column;
}
.related-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}
.related-card .card-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.related-card:hover .card-img { transform: scale(1.05); }
.related-card .card-body {
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}
.related-card .card-body h3 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card .card-body p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card .card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: auto;
}
.related-card .card-link {
    color: var(--primary);
    font-weight: 500;
    transition: color var(--trans-fast);
}
.related-card .card-link:hover { color: var(--accent); }

/* ===== CTA 区 ===== */
.cta-section {
    position: relative;
    z-index: 1;
    padding: 3.5rem 0;
    border-top: 1px solid var(--border-light);
}
.cta-container {
    background:
        radial-gradient(ellipse at 80% 50%, rgba(0,229,160,0.1), transparent 60%),
        radial-gradient(ellipse at 20% 50%, rgba(46,124,246,0.12), transparent 60%),
        rgba(17,24,39,0.5);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
}
.cta-container h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 0.8rem;
}
.cta-container p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 580px;
    margin: 0 auto 1.8rem;
}
.cta-btns {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* ===== 页脚 ===== */
.site-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-light);
    background: #080C14;
    padding-top: 3rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
}
.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
    max-width: 320px;
}
.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.06em;
    margin: 0 0 1rem;
    text-transform: uppercase;
}
.footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.footer-col ul li a,
.footer-col ul li p {
    font-size: 0.88rem;
    color: var(--text-muted);
    transition: color var(--trans-fast);
    line-height: 1.5;
    margin: 0;
}
.footer-col ul li a:hover { color: #fff; }
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.4rem 0;
    border-top: 1px solid var(--border-light);
    font-size: 0.82rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 0.5rem;
}
.footer-bottom p { margin: 0; }

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(17,24,39,0.85);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all var(--trans-med);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--glow-accent);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 280px;
        gap: 1.5rem;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 768px) {
    .nav-container {
        height: 64px;
        gap: 0.8rem;
    }
    .logo-text {
        font-size: 1.1rem;
    }
    .main-nav {
        justify-content: flex-start;
        -webkit-overflow-scrolling: touch;
        overflow-x: auto;
    }
    .nav-cta .cta-text {
        display: none;
    }
    .nav-cta {
        padding: 0.55rem;
        border-radius: 12px;
    }
    .nav-cta .cta-icon {
        display: inline-flex;
    }
    .article-layout {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
        max-height: none;
        flex-direction: row;
        flex-wrap: wrap;
    }
    .sidebar-box {
        flex: 1;
        min-width: 240px;
    }
    .article-card {
        padding: 1.5rem;
    }
    .article-title {
        font-size: 1.5rem;
    }
    .article-hero-img img {
        height: 220px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .cta-container {
        padding: 2rem 1.2rem;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
@media (max-width: 520px) {
    .nav-container {
        gap: 0.5rem;
    }
    .logo-icon {
        width: 32px;
        height: 32px;
    }
    .logo-text {
        font-size: 1rem;
    }
    .nav-tab {
        padding: 0.4rem 0.85rem;
        font-size: 0.82rem;
    }
    .article-card {
        padding: 1.2rem;
    }
    .article-title {
        font-size: 1.3rem;
    }
    .prev-next {
        grid-template-columns: 1fr;
    }
    .next-link {
        text-align: left;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.8rem;
    }
    .breadcrumb-bar .current {
        max-width: 160px;
    }
    .back-to-top {
        right: 16px;
        bottom: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* roulang page: category3 */
:root {
    --bg-primary: #0A0E17;
    --bg-secondary: #111827;
    --accent-blue: #2E7CF6;
    --accent-green: #00E5A0;
    --accent-orange: #FF8A4C;
    --text-primary: #E5EDFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-light: rgba(255,255,255,0.08);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-glow-blue: 0 8px 30px rgba(46,124,246,0.15);
    --shadow-glow-green: 0 0 24px rgba(0,229,160,0.35);
    --transition-base: all 0.3s ease;
  }
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    background-image:
      linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
  }
  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  @media (min-width: 768px) {
    .container {
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
  }
  a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  button,
  input,
  select,
  textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
  }
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10, 14, 23, 0.75);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1rem;
  }
  .logo {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    flex-shrink: 0;
    text-decoration: none;
  }
  .logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(46,124,246,0.35);
  }
  .logo-icon svg {
    width: 22px;
    height: 22px;
    fill: #0A0E17;
    stroke: #0A0E17;
    stroke-width: 1.2;
  }
  .logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    white-space: nowrap;
  }
  .main-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex: 1;
    justify-content: center;
    padding: 0 0.5rem;
  }
  .main-nav::-webkit-scrollbar {
    display: none;
  }
  .nav-tab {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.1rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255,255,255,0.6);
    white-space: nowrap;
    transition: var(--transition-base);
    border: 1px solid transparent;
  }
  .nav-tab:hover {
    color: #fff;
    background: rgba(255,255,255,0.06);
  }
  .nav-tab.active {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    color: #0A0E17;
    font-weight: 600;
    box-shadow: 0 0 20px rgba(0,229,160,0.25);
  }
  .btn-primary,
  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.4rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    white-space: nowrap;
    line-height: 1.4;
  }
  .btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-green) 100%);
    color: #0A0E17;
    box-shadow: 0 4px 20px rgba(46,124,246,0.3);
  }
  .btn-primary:hover {
    box-shadow: var(--shadow-glow-green);
    filter: brightness(1.1);
    transform: translateY(-1px);
  }
  .btn-primary:active {
    transform: scale(0.97);
  }
  .btn-secondary {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.8);
  }
  .btn-secondary:hover {
    border-color: var(--accent-green);
    color: #fff;
    background: rgba(255,255,255,0.04);
  }
  .nav-cta {
    flex-shrink: 0;
  }
  .cta-icon {
    display: inline-flex;
  }
  .site-footer {
    padding: 60px 0 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 80px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
  }
  @media (min-width: 768px) {
    .footer-grid {
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    }
  }
  .footer-brand p {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.7;
    max-width: 320px;
  }
  .footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
  }
  .footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
  }
  .footer-col a,
  .footer-col p {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition-base);
  }
  .footer-col a:hover {
    color: #fff;
  }
  .footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.8rem;
    color: var(--text-muted);
  }
  @media (min-width: 768px) {
    .footer-bottom {
      flex-direction: row;
    }
  }
  .hero-slim {
    position: relative;
    overflow: hidden;
    padding: 60px 0 40px;
    background-image:
      radial-gradient(ellipse at 20% 20%, rgba(46,124,246,0.18) 0%, transparent 60%),
      radial-gradient(ellipse at 80% 80%, rgba(0,229,160,0.12) 0%, transparent 50%),
      url('/assets/images/backpic/back-1.webp');
    background-position: center;
    background-size: cover;
    background-attachment: scroll;
  }
  .hero-slim::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(10,14,23,0.75);
    z-index: 0;
  }
  .hero-slim .container {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
  .hero-slim .tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border-light);
    font-size: 0.8rem;
    color: var(--accent-green);
    font-weight: 500;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
  .hero-slim h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    max-width: 720px;
  }
  @media (min-width: 768px) {
    .hero-slim h1 {
      font-size: 2.5rem;
    }
  }
  .hero-slim .hero-desc {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    line-height: 1.7;
  }
  .section-block {
    padding: 52px 0;
  }
  @media (min-width: 768px) {
    .section-block {
      padding: 72px 0;
    }
  }
  .section-head {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
  }
  .section-head .section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-green);
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
  .section-head .section-label::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-green), transparent);
    border-radius: 2px;
  }
  .section-head h2 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.25;
  }
  @media (min-width: 768px) {
    .section-head h2 {
      font-size: 2rem;
    }
  }
  .section-head p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 640px;
    line-height: 1.7;
  }
  /* 分类页1：图文网格 */
  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  @media (min-width: 768px) {
    .feature-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  .feature-card {
    display: flex;
    flex-direction: column;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
  }
  .feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.16);
    box-shadow: var(--shadow-glow-blue);
  }
  .feature-card .feature-img {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--bg-secondary);
  }
  .feature-card .feature-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
  }
  .feature-card:hover .feature-img img {
    transform: scale(1.03);
  }
  .feature-card .feature-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    flex: 1;
  }
  .feature-card .feature-tag {
    display: inline-block;
    padding: 0.2rem 0.7rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    background: rgba(0,229,160,0.12);
    color: var(--accent-green);
    border: 1px solid rgba(0,229,160,0.2);
    align-self: flex-start;
  }
  .feature-card .feature-body h3 {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
  }
  .feature-card .feature-body p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .feature-card .feature-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-green);
  }
  .feature-card .feature-link:hover {
    gap: 0.6rem;
    color: #fff;
  }
  /* FAQ 手风琴 */
  .faq-wrap {
    max-width: 900px;
    margin: 0 auto;
  }
  .faq-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: var(--transition-base);
  }
  .faq-item:hover {
    border-color: rgba(255,255,255,0.12);
  }
  .faq-item input[type="checkbox"] {
    display: none;
  }
  .faq-question {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1.1rem 1.2rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    user-select: none;
  }
  .faq-question .faq-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    color: #0A0E17;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: transform 0.3s ease;
  }
  .faq-question .faq-plus {
    margin-left: auto;
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.2rem 0 3.6rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
  }
  .faq-item input[type="checkbox"]:checked~.faq-answer {
    max-height: 250px;
    padding-bottom: 1.1rem;
  }
  .faq-item input[type="checkbox"]:checked~.faq-question .faq-plus {
    transform: rotate(45deg);
    color: var(--accent-green);
  }
  .faq-item input[type="checkbox"]:checked~.faq-question .faq-icon {
    box-shadow: 0 0 14px rgba(0,229,160,0.4);
  }
  /* 资源链接列表 */
  .resource-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  .resource-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.2rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
  }
  .resource-item:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(0,229,160,0.3);
    transform: translateX(4px);
  }
  .resource-item .resource-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(46,124,246,0.15), rgba(0,229,160,0.15));
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--accent-green);
    flex-shrink: 0;
  }
  .resource-item .resource-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
  }
  .resource-item .resource-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
  }
  .resource-item .resource-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .resource-item .resource-arrow {
    color: var(--text-muted);
    flex-shrink: 0;
    font-size: 1.1rem;
    transition: var(--transition-base);
  }
  .resource-item:hover .resource-arrow {
    color: var(--accent-green);
    transform: translateX(3px);
  }
  /* CTA 区块 */
  .cta-panel {
    position: relative;
    overflow: hidden;
    background-image:
      radial-gradient(ellipse at 30% 50%, rgba(46,124,246,0.2) 0%, transparent 70%),
      radial-gradient(ellipse at 70% 50%, rgba(0,229,160,0.15) 0%, transparent 60%),
      url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    border-radius: 24px;
    padding: 3rem 2rem;
    border: 1px solid rgba(255,255,255,0.1);
    text-align: center;
  }
  .cta-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(10,14,23,0.7);
    z-index: 0;
    border-radius: 24px;
  }
  .cta-panel>* {
    position: relative;
    z-index: 1;
  }
  .cta-panel h2 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
  }
  .cta-panel p {
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 1.75rem;
    font-size: 0.95rem;
    line-height: 1.7;
  }
  .cta-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
  }
  /* 返回顶部 */
  .back-top {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    color: var(--text-primary);
    z-index: 40;
    transition: var(--transition-base);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  }
  .back-top:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(0,229,160,0.25);
  }
  /* 移动端适配 */
  @media (max-width: 768px) {
    .nav-container {
      height: 64px;
    }
    .logo-text {
      font-size: 1.15rem;
    }
    .logo-icon {
      width: 34px;
      height: 34px;
    }
    .cta-text {
      display: none;
    }
    .nav-cta {
      width: 42px;
      height: 42px;
      padding: 0;
      border-radius: 12px;
    }
    .nav-cta .cta-icon {
      display: flex;
    }
    .main-nav {
      justify-content: flex-start;
      order: 3;
      width: 100%;
      padding-top: 0.5rem;
      padding-bottom: 0.65rem;
      margin-top: 0.5rem;
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    .nav-container {
      flex-wrap: wrap;
      height: auto;
      padding-top: 0.6rem;
    }
    .hero-slim h1 {
      font-size: 1.6rem;
    }
    .section-head h2 {
      font-size: 1.4rem;
    }
    .cta-panel {
      padding: 2.5rem 1.25rem;
    }
    .cta-panel h2 {
      font-size: 1.35rem;
    }
    .cta-btns {
      flex-direction: column;
      align-items: stretch;
    }
    .cta-btns .btn-primary,
    .cta-btns .btn-secondary {
      width: 100%;
    }
    .resource-item {
      flex-direction: column;
      align-items: flex-start;
    }
    .resource-item .resource-arrow {
      align-self: flex-end;
      margin-top: -0.5rem;
    }
  }
  @media (prefers-reduced-motion: reduce) {
    * {
      animation-duration: 0.01ms !important;
      transition-duration: 0.01ms !important;
    }
    html {
      scroll-behavior: auto;
    }
  }

/* roulang page: category2 */
:root {
            --bg-primary: #0a0e17;
            --bg-secondary: #111827;
            --bg-card: rgba(255, 255, 255, 0.04);
            --primary: #2e7cf6;
            --accent: #00e5a0;
            --warning: #ff8a4c;
            --text-main: #e5edff;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border: rgba(255, 255, 255, 0.08);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
            --font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            font-variant-numeric: tabular-nums;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 768px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        .bg-grid {
            position: fixed;
            inset: 0;
            z-index: -2;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .bg-glow {
            position: fixed;
            z-index: -1;
            border-radius: 50%;
            filter: blur(120px);
            pointer-events: none;
        }

        .bg-glow-1 {
            width: 480px;
            height: 480px;
            top: -120px;
            right: -80px;
            background: rgba(46, 124, 246, 0.15);
        }

        .bg-glow-2 {
            width: 360px;
            height: 360px;
            bottom: 60px;
            left: -100px;
            background: rgba(0, 229, 160, 0.08);
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 14, 23, 0.78);
            -webkit-backdrop-filter: blur(20px);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.25), rgba(0, 229, 160, 0.18));
            border: 1px solid rgba(46, 124, 246, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(46, 124, 246, 0.15);
        }

        .logo-icon svg {
            width: 22px;
            height: 22px;
            fill: none;
            stroke: #00e5a0;
            stroke-width: 1.6;
            stroke-linejoin: round;
            stroke-linecap: round;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #e5edff 0%, #94a3b8 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex: 1;
            justify-content: center;
            padding: 0 8px;
        }

        .main-nav::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.6);
            white-space: nowrap;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .nav-tab:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-tab.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.2), rgba(0, 229, 160, 0.12));
            border-color: rgba(0, 229, 160, 0.35);
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.12);
            font-weight: 600;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #0a0e17;
            background: linear-gradient(135deg, #2e7cf6 0%, #00e5a0 100%);
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            flex-shrink: 0;
            box-shadow: 0 4px 16px rgba(46, 124, 246, 0.25);
        }

        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: 0 0 24px rgba(0, 229, 160, 0.35);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.14);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            border-color: rgba(0, 229, 160, 0.5);
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.1);
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            padding: 64px 0 56px;
            background-image:
                linear-gradient(rgba(10, 14, 23, 0.88), rgba(10, 14, 23, 0.94)),
                url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.4), transparent);
        }

        .category-hero-inner {
            position: relative;
            z-index: 1;
            max-width: 860px;
        }

        .category-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(46, 124, 246, 0.12);
            border: 1px solid rgba(46, 124, 246, 0.3);
            font-size: 13px;
            color: #94a3b8;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .category-hero h1 {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #e5edff 0%, #7dd3fc 50%, #00e5a0 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .category-hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 720px;
        }

        .category-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
        }

        .category-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .category-hero-meta svg {
            width: 18px;
            height: 18px;
            stroke: var(--accent);
        }

        @media (max-width: 640px) {
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero-desc {
                font-size: 15px;
            }
        }

        /* Section Heading */
        .section-heading {
            margin-bottom: 40px;
            max-width: 720px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid rgba(0, 229, 160, 0.25);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }

        .section-heading h2 {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-main);
            position: relative;
            padding-left: 18px;
        }

        .section-heading h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 24px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.4);
        }

        .section-heading p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        @media (max-width: 640px) {
            .section-heading h2 {
                font-size: 24px;
            }
        }

        /* Timeline */
        .timeline-section {
            padding: 72px 0 32px;
        }

        .timeline {
            position: relative;
            padding-left: 44px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom,
                    rgba(46, 124, 246, 0.55),
                    rgba(0, 229, 160, 0.35),
                    rgba(255, 255, 255, 0.04));
        }

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
        }

        .timeline-dot {
            position: absolute;
            left: -44px;
            top: 36px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid var(--bg-primary);
            box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.25), 0 0 16px rgba(0, 229, 160, 0.35);
            z-index: 1;
        }

        .timeline-card {
            border-radius: var(--radius);
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 28px;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }

        .timeline-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .timeline-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.16);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3), 0 0 24px rgba(46, 124, 246, 0.08);
        }

        .timeline-card:hover::before {
            opacity: 1;
        }

        .timeline-card-head {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .timeline-date {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.03em;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .tag-primary {
            background: rgba(46, 124, 246, 0.12);
            border: 1px solid rgba(46, 124, 246, 0.3);
            color: #7dd3fc;
        }

        .tag-accent {
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid rgba(0, 229, 160, 0.28);
            color: var(--accent);
        }

        .tag-warning {
            background: rgba(255, 138, 76, 0.12);
            border: 1px solid rgba(255, 138, 76, 0.3);
            color: var(--warning);
        }

        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .timeline-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 14px;
        }

        .timeline-media {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 16px;
        }

        .timeline-media img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .timeline-card:hover .timeline-media img {
            transform: scale(1.03);
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap 0.3s ease;
        }

        .text-link:hover {
            gap: 8px;
            color: #fff;
        }

        @media (max-width: 640px) {
            .timeline {
                padding-left: 32px;
            }
            .timeline-dot {
                left: -32px;
            }
            .timeline-card {
                padding: 20px;
            }
            .timeline-card h3 {
                font-size: 16px;
            }
        }

        /* Data Stats */
        .data-stats-section {
            padding: 40px 0;
        }

        .data-stats-panel {
            border-radius: 24px;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--border);
            padding: 40px 32px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            overflow: hidden;
        }

        .data-stats-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.5), transparent);
        }

        .data-stat-item {
            text-align: center;
            padding: 16px 8px;
            position: relative;
        }

        .data-stat-item + .data-stat-item::before {
            content: '';
            position: absolute;
            left: -16px;
            top: 20%;
            bottom: 20%;
            width: 1px;
            background: rgba(255, 255, 255, 0.08);
        }

        .data-stat-number {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
            display: block;
            margin-bottom: 8px;
            text-shadow: 0 0 30px rgba(0, 229, 160, 0.2);
        }

        .data-stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        @media (max-width: 768px) {
            .data-stats-panel {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .data-stat-item + .data-stat-item::before {
                display: none;
            }
            .data-stat-number {
                font-size: 34px;
            }
        }

        /* Ranking Entry Cards */
        .rank-entry-section {
            padding: 64px 0 32px;
        }

        .rank-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .rank-card {
            border-radius: var(--radius);
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 28px 24px;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }

        .rank-card::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: rgba(46, 124, 246, 0.08);
            filter: blur(30px);
            transition: all 0.4s ease;
        }

        .rank-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(46, 124, 246, 0.08);
        }

        .rank-card:hover::after {
            transform: scale(1.5);
            background: rgba(0, 229, 160, 0.1);
        }

        .rank-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.2), rgba(0, 229, 160, 0.12));
            border: 1px solid rgba(46, 124, 246, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .rank-card-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--accent);
            fill: none;
            stroke-width: 1.6;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .rank-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .rank-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .rank-card .text-link {
            font-size: 13px;
            position: relative;
            z-index: 1;
        }

        @media (max-width: 1024px) {
            .rank-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .rank-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-section {
            padding: 72px 0 40px;
        }

        .faq-list {
            max-width: 860px;
        }

        .faq-item {
            border-radius: var(--radius);
            background: var(--bg-card);
            border: 1px solid var(--border);
            margin-bottom: 16px;
            transition: border-color 0.3s ease, background 0.3s ease;
            overflow: hidden;
        }

        .faq-item.active {
            border-color: rgba(0, 229, 160, 0.25);
            background: rgba(255, 255, 255, 0.05);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .faq-question:hover {
            color: #fff;
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.25), rgba(0, 229, 160, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            border: 1px solid rgba(0, 229, 160, 0.2);
        }

        .faq-icon svg {
            width: 16px;
            height: 16px;
            stroke: var(--accent);
            fill: none;
            stroke-width: 2.5;
            stroke-linecap: round;
        }

        .faq-question-text {
            flex: 1;
        }

        .faq-arrow {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            transition: transform 0.35s ease;
        }

        .faq-arrow svg {
            width: 20px;
            height: 20px;
            stroke: var(--text-muted);
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-item.active .faq-arrow svg {
            stroke: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 240px;
        }

        .faq-answer p {
            padding: 0 24px 20px 72px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        @media (max-width: 640px) {
            .faq-answer p {
                padding-left: 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
        }

        /* CTA Section */
        .cta-section {
            padding: 72px 0 80px;
        }

        .cta-inner {
            border-radius: 24px;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
            border: 1px solid var(--border);
            padding: 48px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(46, 124, 246, 0.4), rgba(0, 229, 160, 0.4), transparent);
        }

        .cta-left h2 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-left>p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .contact-info-list {
            display: grid;
            gap: 20px;
        }

        .contact-info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }

        .contact-info-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(46, 124, 246, 0.12);
            border: 1px solid rgba(46, 124, 246, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .contact-info-icon svg {
            width: 20px;
            height: 20px;
            stroke: var(--accent);
            fill: none;
            stroke-width: 1.8;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .contact-info-item h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 2px;
        }

        .contact-info-item p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .cta-form {
            display: grid;
            gap: 16px;
        }

        .form-group {
            display: grid;
            gap: 6px;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .form-group .required {
            color: var(--warning);
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-main);
            font-size: 14px;
            transition: all 0.3s ease;
            outline: none;
            -webkit-appearance: none;
            appearance: none;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.12);
            background: rgba(255, 255, 255, 0.06);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-muted);
        }

        .form-group select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            padding-right: 44px;
        }

        .form-group select option {
            background: var(--bg-secondary);
            color: var(--text-main);
        }

        .btn-submit {
            justify-content: center;
            width: 100%;
            padding: 14px 24px;
            margin-top: 8px;
            font-size: 15px;
        }

        .form-status {
            font-size: 14px;
            color: var(--accent);
            text-align: center;
            min-height: 20px;
        }

        @media (max-width: 768px) {
            .cta-inner {
                grid-template-columns: 1fr;
                padding: 32px 24px;
                gap: 32px;
            }
            .cta-left h2 {
                font-size: 24px;
            }
        }

        /* Footer */
        .site-footer {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            background: rgba(17, 24, 39, 0.6);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 14px;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            letter-spacing: 0.06em;
            margin-bottom: 18px;
        }

        .footer-col ul {
            list-style: none;
            display: grid;
            gap: 10px;
        }

        .footer-col li a,
        .footer-col li p {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.3s ease;
            line-height: 1.5;
        }

        .footer-col li a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 24px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Back to Top */
        .back-to-top {
            position: fixed;
            right: 24px;
            bottom: 28px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            z-index: 60;
            transition: all 0.35s ease;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        .back-to-top:hover {
            background: rgba(0, 229, 160, 0.12);
            border-color: rgba(0, 229, 160, 0.4);
            color: var(--accent);
            transform: translateY(-4px);
        }

        .back-to-top svg {
            width: 20px;
            height: 20px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2.5;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* Animations */
        @keyframes float-slow {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
        }

        @keyframes float-slower {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }