/* roulang page: index */
:root {
    --amber: #E8A33D;
    --amber-light: #F6C56B;
    --amber-dark: #C47A1F;
    --ink: #11161F;
    --ink-soft: #1A212E;
    --paper: #F8F4EC;
    --green: #3ECF8E;
    --text: #1F2937;
    --text-soft: #6B7280;
    --border: rgba(0,0,0,.06);
    --glow: rgba(232,163,61,.45);
    --radius: 1rem;
    --radius-lg: 1.25rem;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  button, input { font: inherit; border: none; background: none; }
  ul { list-style: none; }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  @media (min-width: 768px) {
    .container { padding-left: 2rem; padding-right: 2rem; }
  }

  /* ===== 按钮 ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .7rem 1.6rem;
    border-radius: .75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .3s ease;
    text-align: center;
    border: 2px solid transparent;
  }
  .btn-primary {
    background: var(--amber);
    color: #11161F;
    border-color: var(--amber);
  }
  .btn-primary:hover {
    background: var(--amber-light);
    box-shadow: 0 0 20px var(--glow);
    transform: translateY(-1px);
  }
  .btn-primary:active { transform: translateY(2px); }
  .btn-ghost {
    background: transparent;
    color: #F3F4F6;
    border-color: rgba(255,255,255,.45);
  }
  .btn-ghost:hover {
    border-color: var(--amber);
    color: var(--amber);
  }
  .btn-outline {
    background: transparent;
    color: var(--text);
    border-color: rgba(0,0,0,.18);
  }
  .btn-outline:hover {
    border-color: var(--amber);
    color: var(--amber-dark);
    box-shadow: 0 0 12px rgba(232,163,61,.2);
  }
  .btn-lg { padding: .95rem 2.2rem; font-size: 1.05rem; }
  .btn:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 2px;
  }

  /* ===== Header / Nav ===== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(17,22,31,.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,.06);
    height: 68px;
  }
  .header-inner {
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
  }
  .logo {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: 1.25rem;
    font-weight: 800;
    color: #F3F4F6;
    white-space: nowrap;
  }
  .logo-seal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--amber-light), var(--amber-dark));
    color: #11161F;
    font-size: 1.1rem;
    font-weight: 900;
    box-shadow: 0 0 14px var(--glow);
  }
  .logo-highlight {
    color: var(--amber);
    text-shadow: 0 0 12px var(--glow);
  }
  .main-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
  }
  .nav-link {
    position: relative;
    color: #D1D5DB;
    font-size: .95rem;
    font-weight: 500;
    padding: .4rem 0;
    transition: color .25s ease;
  }
  .nav-link:hover { color: #fff; }
  .nav-link.active {
    color: var(--amber);
  }
  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--amber), var(--amber-light));
    box-shadow: 0 0 10px var(--glow);
  }
  .nav-btn { margin-left: .5rem; }
  .nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 6px;
    cursor: pointer;
  }
  .nav-toggle span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: #F3F4F6;
    transition: all .3s ease;
  }
  .nav-close {
    display: none;
    font-size: 2rem;
    color: #F3F4F6;
    line-height: 1;
    cursor: pointer;
    padding: .5rem;
  }
  @media (max-width: 1023px) {
    .nav-toggle { display: flex; }
    .main-nav {
      position: fixed;
      inset: 0;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2rem;
      background: rgba(17,22,31,.98);
      -webkit-backdrop-filter: blur(12px);
      backdrop-filter: blur(12px);
      z-index: 999;
      transform: translateY(-100%);
      transition: transform .35s ease;
    }
    .main-nav.nav-open { transform: translateY(0); }
    .nav-link { font-size: 1.5rem; color: #F3F4F6; }
    .nav-close { display: block; position: absolute; top: 1rem; right: 1.2rem; }
    .nav-btn { margin-left: 0; margin-top: .5rem; }
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: 7rem 0 4rem;
    background-color: var(--ink);
    overflow: hidden;
  }
  .hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: .5;
  }
  .hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(17,22,31,.55) 0%, rgba(17,22,31,.45) 55%, rgba(17,22,31,.88) 100%);
  }
  .hero-glow-1 {
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--glow), transparent 70%);
    top: 10%;
    right: 8%;
    pointer-events: none;
  }
  .hero-glow-2 {
    position: absolute;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232,163,61,.25), transparent 70%);
    bottom: 5%;
    left: 4%;
    pointer-events: none;
  }
  .hero-container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 2.5rem;
    align-items: center;
  }
  @media (max-width: 900px) {
    .hero-container { grid-template-columns: 1fr; }
  }
  .hero-eyebrow {
    display: inline-block;
    font-size: .85rem;
    letter-spacing: .15em;
    color: var(--amber-light);
    border: 1px solid rgba(232,163,61,.35);
    border-radius: 999px;
    padding: .3rem .9rem;
    margin-bottom: 1.2rem;
    background: rgba(232,163,61,.08);
  }
  .hero h1 {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    line-height: 1.12;
    font-weight: 900;
    color: #F3F4F6;
    margin-bottom: 1.2rem;
  }
  .hero h1 .amber-text {
    color: var(--amber);
    text-shadow: 0 0 24px var(--glow);
  }
  .hero-sub {
    font-size: 1.05rem;
    line-height: 1.8;
    color: rgba(243,244,246,.82);
    max-width: 540px;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.8rem;
  }
  @media (max-width: 520px) {
    .hero-actions .btn { width: 100%; }
  }
  .hero-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
  .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
    border-radius: 12px;
    background: rgba(255,255,255,.03);
  }
  .stat-num {
    font-size: 2rem;
    font-weight: 900;
    color: var(--amber);
    line-height: 1.1;
  }
  .stat-label {
    font-size: .85rem;
    color: rgba(255,255,255,.7);
    margin-top: .3rem;
  }
  @media (max-width: 900px) {
    .hero-stats {
      grid-template-columns: repeat(3, 1fr);
      padding: 1rem;
    }
    .stat { padding: .7rem .5rem; }
    .stat-num { font-size: 1.4rem; }
  }

  /* ===== Section headings ===== */
  .section-block {
    padding: 5rem 0;
  }
  @media (min-width: 768px) {
    .section-block { padding: 7rem 0; }
  }
  .section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 3rem;
  }
  .section-head h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: .6rem;
  }
  .section-head p {
    color: var(--text-soft);
    font-size: 1rem;
  }
  .section-head .highlight {
    color: var(--amber-dark);
  }

  /* ===== Feature cards ===== */
  .section-features {
    background: var(--paper);
    padding: 5rem 0;
  }
  @media (min-width: 768px) {
    .section-features { padding: 7rem 0; }
  }
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
  }
  .feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 1.6rem;
    transition: all .35s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
  }
  .feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,.08);
    border-color: rgba(232,163,61,.4);
  }
  .feature-card:hover .feature-icon {
    color: var(--amber);
    text-shadow: 0 0 16px var(--glow);
  }
  .feature-card-large { grid-column: span 6; }
  .feature-card-small { grid-column: span 4; }
  .feature-card-large:first-child { grid-column: span 7; }
  .feature-card-large:nth-child(2) { grid-column: span 5; }
  @media (max-width: 1023px) {
    .feature-card-large,
    .feature-card-small,
    .feature-card-large:first-child,
    .feature-card-large:nth-child(2) { grid-column: span 6; }
  }
  @media (max-width: 640px) {
    .feature-card-large,
    .feature-card-small,
    .feature-card-large:first-child,
    .feature-card-large:nth-child(2) { grid-column: span 12; }
  }
  .feature-icon {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    transition: all .3s ease;
  }
  .feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: .5rem;
  }
  .feature-card p {
    font-size: .92rem;
    color: var(--text-soft);
    line-height: 1.6;
    flex: 1;
  }
  .feature-link {
    color: var(--amber-dark);
    font-size: .9rem;
    font-weight: 600;
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    transition: gap .25s ease;
  }
  .feature-link:hover { gap: .6rem; }

  /* ===== Scenarios ===== */
  .section-scenarios { background: #fff; padding: 5rem 0; }
  @media (min-width: 768px) { .section-scenarios { padding: 7rem 0; } }
  .scenario-list {
    display: flex;
    flex-direction: column;
    gap: 3.5rem;
  }
  .scenario-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
    position: relative;
  }
  .scenario-row-reverse .scenario-media { order: 2; }
  .scenario-row-reverse .scenario-text { order: 1; }
  @media (max-width: 820px) {
    .scenario-row { grid-template-columns: 1fr; }
    .scenario-row-reverse .scenario-media { order: 1; }
    .scenario-row-reverse .scenario-text { order: 2; }
  }
  .scenario-media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
  }
  .scenario-media img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: transform .5s ease;
  }
  .scenario-media:hover img { transform: scale(1.03); }
  .scenario-text {
    position: relative;
    padding: 1rem 0;
  }
  .scenario-num {
    position: absolute;
    top: -1.6rem;
    left: -.4rem;
    font-size: 6rem;
    font-weight: 900;
    color: rgba(232,163,61,.18);
    z-index: 0;
    pointer-events: none;
    letter-spacing: -4px;
  }
  .scenario-text h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: .8rem;
    position: relative;
    z-index: 1;
  }
  .scenario-text p {
    color: var(--text-soft);
    font-size: .98rem;
    position: relative;
    z-index: 1;
  }
  .scenario-text ul {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: .4rem;
    position: relative;
    z-index: 1;
  }
  .scenario-text li {
    font-size: .92rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: .5rem;
  }
  .scenario-text li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
  }

  /* ===== Cases ===== */
  .section-cases {
    background: var(--ink);
    padding: 5rem 0;
  }
  @media (min-width: 768px) { .section-cases { padding: 7rem 0; } }
  .section-cases .section-head h2 { color: #F3F4F6; }
  .section-cases .section-head p { color: rgba(255,255,255,.6); }
  .case-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 3rem;
  }
  @media (max-width: 640px) {
    .case-stats { grid-template-columns: repeat(2, 1fr); }
  }
  .case-stat {
    text-align: center;
    padding: 1.2rem 1rem;
    border-radius: 12px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.06);
  }
  .case-stat-num {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--amber);
    line-height: 1.1;
    display: block;
  }
  .case-stat-label {
    font-size: .8rem;
    color: rgba(255,255,255,.6);
    margin-top: .3rem;
    display: block;
  }
  .case-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .case-card {
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all .35s ease;
  }
  .case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,.3);
    border-color: rgba(232,163,61,.35);
  }
  .case-card-body { padding: 1.5rem; }
  .case-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
  }
  .case-card h3 {
    color: #F3F4F6;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: .5rem;
  }
  .case-card p {
    color: rgba(255,255,255,.65);
    font-size: .9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
  }
  .case-result {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--amber);
    line-height: 1.1;
  }
  .case-result span {
    display: block;
    font-size: .78rem;
    color: rgba(255,255,255,.5);
    margin-top: .2rem;
    font-weight: 400;
  }
  @media (max-width: 900px) {
    .case-cards { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
    .case-card-offset { margin-top: 0; }
  }
  .case-card-offset {
    transform: translateY(20px);
  }
  .case-card-offset:hover { transform: translateY(16px); }
  @media (max-width: 900px) {
    .case-card-offset { transform: none; }
    .case-card-offset:hover { transform: translateY(-4px); }
  }

  /* ===== Pricing ===== */
  .section-pricing { background: var(--paper); padding: 5rem 0; }
  @media (min-width: 768px) { .section-pricing { padding: 7rem 0; } }
  .pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: stretch;
    max-width: 1080px;
    margin: 0 auto;
  }
  @media (max-width: 900px) {
    .pricing-grid { grid-template-columns: 1fr; max-width: 480px; }
  }
  .pricing-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 1.8rem;
    display: flex;
    flex-direction: column;
    box-shadow: 0 1px 2px rgba(0,0,0,.05);
    transition: all .3s ease;
    position: relative;
  }
  .pricing-card:hover {
    box-shadow: 0 12px 24px rgba(0,0,0,.08);
  }
  .pricing-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: .5rem;
  }
  .pricing-price {
    display: flex;
    align-items: baseline;
    gap: .2rem;
    margin-bottom: 1.4rem;
  }
  .price-num {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
    color: var(--text);
  }
  .price-unit {
    font-size: .85rem;
    color: var(--text-soft);
  }
  .pricing-card ul {
    display: flex;
    flex-direction: column;
    gap: .55rem;
    margin-bottom: 1.8rem;
    flex: 1;
  }
  .pricing-card li {
    font-size: .92rem;
    color: var(--text);
    display: flex;
    gap: .4rem;
    align-items: flex-start;
  }
  .pricing-card li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
    flex-shrink: 0;
  }
  .pricing-card .btn { width: 100%; }
  .pricing-card-highlight {
    background: var(--ink);
    border: 2px solid var(--amber);
    box-shadow: 0 0 30px rgba(232,163,61,.25);
    transform: scale(1.02);
    z-index: 2;
  }
  .pricing-card-highlight h3,
  .pricing-card-highlight .price-num { color: #F3F4F6; }
  .pricing-card-highlight .price-unit,
  .pricing-card-highlight li { color: rgba(255,255,255,.75); }
  .pricing-card-highlight:hover {
    box-shadow: 0 0 40px rgba(232,163,61,.35);
  }
  @media (max-width: 900px) {
    .pricing-card-highlight { transform: none; }
  }
  .badge {
    position: absolute;
    top: -12px;
    right: 1rem;
    background: var(--amber);
    color: #11161F;
    font-size: .75rem;
    font-weight: 700;
    padding: .25rem .8rem;
    border-radius: 999px;
    box-shadow: 0 0 12px var(--glow);
  }

  /* ===== FAQ ===== */
  .section-faq {
    background: #fff;
    padding: 5rem 0;
  }
  @media (min-width: 768px) { .section-faq { padding: 7rem 0; } }
  .faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  .faq-item {
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all .3s ease;
  }
  .faq-item.faq-open {
    border-color: rgba(232,163,61,.45);
    box-shadow: 0 4px 16px rgba(232,163,61,.08);
  }
  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.4rem;
    cursor: pointer;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    min-height: 48px;
    transition: color .25s ease;
  }
  .faq-open .faq-question { color: var(--amber-dark); }
  .faq-icon {
    font-size: 1.4rem;
    font-weight: 400;
    line-height: 1;
    color: var(--amber-dark);
    transition: transform .3s ease;
    flex-shrink: 0;
  }
  .faq-open .faq-icon { transform: rotate(45deg); }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }
  .faq-answer p {
    padding: 0 1.4rem 1.2rem;
    font-size: .95rem;
    color: var(--text-soft);
    line-height: 1.7;
  }

  /* ===== CTA ===== */
  .section-cta {
    position: relative;
    background: var(--ink);
    padding: 6rem 0;
    text-align: center;
    overflow: hidden;
    border-top: 1px solid rgba(255,255,255,.06);
  }
  .section-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.jpg');
    background-size: cover;
    background-position: center;
    opacity: .22;
  }
  .section-cta::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 30%, rgba(17,22,31,.75) 100%);
  }
  .cta-inner {
    position: relative;
    z-index: 2;
  }
  .cta-inner h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 900;
    color: #F3F4F6;
    line-height: 1.2;
    margin-bottom: .8rem;
  }
  .cta-inner p {
    color: rgba(255,255,255,.7);
    font-size: 1rem;
    max-width: 520px;
    margin: 0 auto 2rem;
  }
  .cta-inner h2 span {
    color: var(--amber);
    text-shadow: 0 0 20px var(--glow);
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--ink);
    color: #9CA3AF;
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--amber), transparent) 1;
    padding-top: 4rem;
  }
  .footer-top {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
  }
  @media (max-width: 900px) {
    .footer-top { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 560px) {
    .footer-top { grid-template-columns: 1fr; }
  }
  .footer-brand .logo {
    font-size: 1.2rem;
    margin-bottom: .8rem;
  }
  .footer-brand p {
    font-size: .88rem;
    line-height: 1.7;
    color: rgba(255,255,255,.55);
    margin-top: .6rem;
  }
  .footer-links h4,
  .footer-contact h4,
  .footer-newsletter h4 {
    color: #F3F4F6;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
  }
  .footer-links a {
    display: block;
    padding: .25rem 0;
    color: rgba(255,255,255,.6);
    font-size: .9rem;
    transition: color .25s ease;
  }
  .footer-links a:hover { color: var(--amber); }
  .footer-contact p {
    font-size: .9rem;
    color: rgba(255,255,255,.6);
    margin-bottom: .4rem;
  }
  .newsletter-form {
    display: flex;
    gap: .5rem;
    margin-top: .5rem;
  }
  .newsletter-form input {
    flex: 1;
    height: 48px;
    border-radius: 12px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.12);
    color: #F3F4F6;
    padding: 0 1rem;
    font-size: .9rem;
    transition: all .3s ease;
  }
  .newsletter-form input::placeholder { color: rgba(255,255,255,.35); }
  .newsletter-form input:focus {
    outline: none;
    border-color: var(--amber);
    box-shadow: 0 0 0 3px rgba(232,163,61,.15);
  }
  .newsletter-form button {
    height: 48px;
    padding: 0 1.2rem;
    border-radius: 12px;
    background: var(--amber);
    color: #11161F;
    font-weight: 700;
    cursor: pointer;
    transition: all .3s ease;
    white-space: nowrap;
  }
  .newsletter-form button:hover {
    background: var(--amber-light);
    box-shadow: 0 0 16px var(--glow);
  }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 1.2rem 0;
    text-align: center;
  }
  .footer-bottom p {
    font-size: .85rem;
    color: rgba(255,255,255,.4);
  }
  .footer-bottom a { color: rgba(255,255,255,.5); }
  .footer-bottom a:hover { color: var(--amber); }

  /* ===== Animations ===== */
  @keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .fade-up { animation: fadeInUp .4s ease both; }

  /* focus */
  :focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 2px;
  }

  /* misc */
  @media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
  }

/* roulang page: category1 */
:root {
    --amber: #E8A33D;
    --amber-light: #F6C56B;
    --amber-dark: #C47A1F;
    --ink: #11161F;
    --ink-soft: #1A212E;
    --paper: #F8F4EC;
    --green: #3ECF8E;
    --text: #1F2937;
    --text-soft: #6B7280;
    --border: rgba(0,0,0,.06);
    --glow: rgba(232,163,61,.45);
    --radius: 1rem;
    --radius-lg: 1.25rem;
}
html { scroll-behavior: smooth; }
body {
    font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button, input { font: inherit; border: none; background: none; }
* { box-sizing: border-box; margin: 0; padding: 0; }

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}
@media (min-width: 768px) {
    .container { padding-left: 2rem; padding-right: 2rem; }
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .7rem 1.6rem;
    border-radius: .75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .3s ease;
    text-align: center;
    border: 2px solid transparent;
}
.btn-primary {
    background: var(--amber);
    color: #11161F;
    border-color: var(--amber);
}
.btn-primary:hover {
    background: var(--amber-light);
    box-shadow: 0 0 20px var(--glow);
    transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(2px); }
.btn-ghost {
    background: transparent;
    color: #F3F4F6;
    border-color: rgba(255,255,255,.45);
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); }
.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: rgba(0,0,0,.18);
}
.btn-outline:hover { border-color: var(--amber); color: var(--amber-dark); box-shadow: 0 0 12px rgba(232,163,61,.2); }
.btn-lg { padding: .95rem 2.2rem; font-size: 1.05rem; }
.btn:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(17,22,31,.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,.06);
    height: 68px;
}
.header-inner {
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}
.logo {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: 1.25rem;
    font-weight: 800;
    color: #F3F4F6;
    white-space: nowrap;
}
.logo-seal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--amber-light), var(--amber-dark));
    color: #11161F;
    font-size: 1.1rem;
    font-weight: 900;
    box-shadow: 0 0 14px var(--glow);
}
.logo-highlight {
    color: var(--amber);
    text-shadow: 0 0 12px var(--glow);
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-link {
    position: relative;
    color: #D1D5DB;
    font-size: .95rem;
    font-weight: 500;
    padding: .4rem 0;
    transition: color .25s ease;
}
.nav-link:hover { color: #fff; }
.nav-link.active {
    color: var(--amber);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--amber), var(--amber-light));
    box-shadow: 0 0 10px var(--glow);
}
.nav-btn { margin-left: .5rem; }
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 6px;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: #F3F4F6;
    transition: all .3s ease;
}
.nav-close {
    display: none;
    font-size: 2rem;
    color: #F3F4F6;
    line-height: 1;
    cursor: pointer;
    padding: .5rem;
}
@media (max-width: 1023.98px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        inset: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        background: rgba(17,22,31,.98);
        -webkit-backdrop-filter: blur(12px);
        backdrop-filter: blur(12px);
        z-index: 999;
        transform: translateY(-100%);
        transition: transform .35s ease;
        padding: 2rem 0;
    }
    .main-nav.nav-open { transform: translateY(0); }
    .nav-link { font-size: 1.35rem; color: #F3F4F6; }
    .nav-close { display: block; position: absolute; top: 1rem; right: 1.2rem; }
    .nav-btn { margin-left: 0; margin-top: .5rem; }
}

/* ===== Page Hero ===== */
.page-hero {
    position: relative;
    padding: 9rem 0 3.5rem;
    background-color: var(--ink);
    background-image: url('/assets/images/backpic/back-2.jpg');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(17,22,31,.82) 0%, rgba(17,22,31,.68) 60%, rgba(17,22,31,.9) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .85rem;
    color: rgba(255,255,255,.6);
    margin-bottom: 1.2rem;
}
.breadcrumb a { color: rgba(255,255,255,.6); transition: color .25s; }
.breadcrumb a:hover { color: var(--amber); }
.breadcrumb .sep { color: rgba(255,255,255,.3); }
.breadcrumb .current { color: var(--amber-light); }
.page-hero h1 {
    font-size: clamp(2rem, 4.2vw, 3rem);
    line-height: 1.15;
    font-weight: 900;
    color: #F3F4F6;
    margin-bottom: 1rem;
}
.page-hero h1 .amber-text {
    color: var(--amber);
    text-shadow: 0 0 24px var(--glow);
}
.page-hero .hero-desc {
    font-size: 1.02rem;
    line-height: 1.75;
    color: rgba(255,255,255,.75);
    max-width: 680px;
    margin-bottom: 1.4rem;
}
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .6rem;
}
.tag-chip {
    display: inline-block;
    padding: .3rem .9rem;
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 500;
    color: var(--amber-light);
    background: rgba(232,163,61,.1);
    border: 1px solid rgba(232,163,61,.3);
    transition: all .25s;
}
.tag-chip:hover {
    background: rgba(232,163,61,.2);
    border-color: var(--amber);
}

/* ===== 分类主体 ===== */
.category-main {
    padding: 3rem 0 2.5rem;
}
.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
@media (min-width: 1024px) {
    .category-grid {
        grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
        gap: 2.5rem;
    }
}

/* 内容列表 */
.content-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    align-content: start;
}
@media (min-width: 768px) {
    .content-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.video-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,.08);
    border-color: rgba(232,163,61,.3);
}
.video-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--ink-soft);
}
.video-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.video-card:hover .video-cover img { transform: scale(1.04); }
.video-cover .play-badge {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(17,22,31,.72);
    border: 2px solid rgba(255,255,255,.7);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    transition: all .3s;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}
.video-card:hover .play-badge {
    background: var(--amber);
    color: #11161F;
    border-color: var(--amber);
    box-shadow: 0 0 20px var(--glow);
}
.video-cover .duration-tag {
    position: absolute;
    right: .6rem;
    bottom: .6rem;
    padding: .15rem .5rem;
    border-radius: .3rem;
    font-size: .72rem;
    font-weight: 600;
    color: #F3F4F6;
    background: rgba(17,22,31,.75);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}
.video-cover .views-tag {
    position: absolute;
    left: .6rem;
    bottom: .6rem;
    padding: .15rem .5rem;
    border-radius: .3rem;
    font-size: .72rem;
    font-weight: 500;
    color: #F3F4F6;
    background: rgba(17,22,31,.55);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}
.video-info {
    padding: 1rem 1.1rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: .4rem;
    flex: 1;
}
.video-meta {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}
.video-badge {
    display: inline-block;
    padding: .15rem .55rem;
    border-radius: 999px;
    font-size: .7rem;
    font-weight: 600;
    background: var(--ink);
    color: var(--amber-light);
    letter-spacing: .03em;
}
.video-badge-green {
    background: rgba(62,207,142,.12);
    color: #0B8A4D;
}
.video-date {
    font-size: .75rem;
    color: var(--text-soft);
}
.video-info h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.4;
    transition: color .25s;
}
.video-card:hover .video-info h3 { color: var(--amber-dark); }
.video-info p {
    font-size: .85rem;
    color: var(--text-soft);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}

/* 侧边栏 */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
    align-content: start;
}
.sidebar-card {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.4rem;
    box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.sidebar-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: .4rem;
}
.sidebar-card h4::before {
    content: '';
    width: 4px;
    height: 18px;
    border-radius: 2px;
    background: var(--amber);
    box-shadow: 0 0 8px var(--glow);
}
.cat-list {
    display: flex;
    flex-direction: column;
    gap: .2rem;
}
.cat-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .5rem .6rem;
    border-radius: .5rem;
    font-size: .88rem;
    color: var(--text);
    transition: all .2s;
}
.cat-list a:hover {
    background: var(--paper);
    color: var(--amber-dark);
}
.cat-list a.active-cat {
    background: rgba(232,163,61,.1);
    color: var(--amber-dark);
    font-weight: 600;
}
.cat-list .count {
    font-size: .75rem;
    color: var(--text-soft);
    background: var(--paper);
    padding: .1rem .45rem;
    border-radius: .4rem;
}
.hot-list {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}
.hot-item {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: .5rem;
    border-radius: .5rem;
    transition: background .2s;
}
.hot-item:hover { background: var(--paper); }
.hot-rank {
    width: 28px;
    height: 28px;
    border-radius: .4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    font-weight: 700;
    color: var(--text-soft);
    background: var(--paper);
    flex-shrink: 0;
}
.hot-item:nth-child(1) .hot-rank { background: var(--amber); color: #11161F; box-shadow: 0 0 8px var(--glow); }
.hot-item:nth-child(2) .hot-rank { background: rgba(232,163,61,.2); color: var(--amber-dark); }
.hot-item:nth-child(3) .hot-rank { background: rgba(232,163,61,.12); color: var(--amber-dark); }
.hot-item .hot-info { flex: 1; min-width: 0; }
.hot-item .hot-info .hot-title {
    font-size: .85rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color .2s;
}
.hot-item:hover .hot-info .hot-title { color: var(--amber-dark); }
.hot-item .hot-info .hot-views {
    font-size: .72rem;
    color: var(--text-soft);
}
.sidebar-newsletter {
    background: linear-gradient(145deg, var(--ink), #1d2635);
    border-radius: var(--radius);
    padding: 1.5rem;
    color: #F3F4F6;
    border: 1px solid rgba(232,163,61,.2);
}
.sidebar-newsletter h4 { color: #F3F4F6; }
.sidebar-newsletter h4::before { background: var(--amber); }
.sidebar-newsletter p {
    font-size: .82rem;
    color: rgba(255,255,255,.6);
    margin-bottom: 1rem;
    line-height: 1.6;
}
.newsletter-form {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
}
.newsletter-form input {
    flex: 1;
    min-width: 140px;
    height: 44px;
    padding: 0 .9rem;
    border-radius: .65rem;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.15);
    color: #F3F4F6;
    font-size: .85rem;
    transition: border-color .25s, box-shadow .25s;
}
.newsletter-form input::placeholder { color: rgba(255,255,255,.4); }
.newsletter-form input:focus {
    outline: none;
    border-color: var(--amber);
    box-shadow: 0 0 0 3px rgba(232,163,61,.15);
}
.newsletter-form button {
    height: 44px;
    padding: 0 1.1rem;
    border-radius: .65rem;
    background: var(--amber);
    color: #11161F;
    font-weight: 600;
    cursor: pointer;
    transition: all .25s;
    border: none;
    font-size: .85rem;
}
.newsletter-form button:hover {
    background: var(--amber-light);
    box-shadow: 0 0 14px var(--glow);
}

/* 分页器 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: .4rem;
    padding: 2.5rem 0 1.5rem;
}
.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 .8rem;
    border-radius: .6rem;
    font-size: .9rem;
    font-weight: 500;
    color: var(--text);
    background: #fff;
    border: 1px solid var(--border);
    transition: all .25s;
}
.page-link:hover {
    border-color: var(--amber);
    color: var(--amber-dark);
}
.page-link.active {
    background: var(--amber);
    color: #11161F;
    border-color: var(--amber);
    font-weight: 700;
    box-shadow: 0 0 12px var(--glow);
}
.page-link.disabled {
    opacity: .4;
    pointer-events: none;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 3.5rem 0;
    background: var(--ink);
}
.faq-section .section-head {
    text-align: center;
    margin-bottom: 2.5rem;
}
.faq-section .section-head h2 {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 800;
    color: #F3F4F6;
    margin-bottom: .5rem;
}
.faq-section .section-head h2 .amber-text {
    color: var(--amber);
    text-shadow: 0 0 16px var(--glow);
}
.faq-section .section-head p {
    color: rgba(255,255,255,.55);
    font-size: .92rem;
}
.faq-list {
    max-width: 780px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: .8rem;
}
.faq-item {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: .9rem;
    overflow: hidden;
    transition: border-color .3s;
}
.faq-item.open {
    border-color: rgba(232,163,61,.4);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    padding: 1rem 1.2rem;
    font-size: .95rem;
    font-weight: 600;
    color: #F3F4F6;
    cursor: pointer;
    text-align: left;
    min-height: 52px;
    transition: color .3s;
    background: transparent;
    border: none;
}
.faq-item.open .faq-question { color: var(--amber); }
.faq-icon {
    font-size: 1.2rem;
    color: var(--amber);
    flex-shrink: 0;
    transition: transform .3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
}
.faq-answer-inner {
    padding: 0 1.2rem 1.1rem;
    font-size: .88rem;
    color: rgba(255,255,255,.65);
    line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
    position: relative;
    padding: 4rem 0 4.5rem;
    background-color: var(--ink);
    background-image: url('/assets/images/backpic/back-3.jpg');
    background-size: cover;
    background-position: center;
    overflow: hidden;
    text-align: center;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(17,22,31,.88) 0%, rgba(17,22,31,.75) 55%, rgba(17,22,31,.92) 100%);
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 900;
    color: #F3F4F6;
    margin-bottom: .8rem;
    line-height: 1.25;
}
.cta-section h2 .amber-text {
    color: var(--amber);
    text-shadow: 0 0 20px var(--glow);
}
.cta-section p {
    font-size: 1rem;
    color: rgba(255,255,255,.65);
    margin-bottom: 1.8rem;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.cta-buttons .btn {
    min-width: 150px;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--ink);
    color: rgba(255,255,255,.7);
    border-top: 2px solid;
    border-image: linear-gradient(90deg, transparent, var(--amber), transparent) 1;
    padding-top: 3.5rem;
}
.footer-top {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2.5rem;
}
@media (min-width: 768px) {
    .footer-top {
        grid-template-columns: 2fr 1fr 1fr 1.4fr;
        gap: 2rem;
    }
}
.footer-brand .logo { margin-bottom: .8rem; }
.footer-brand p {
    font-size: .86rem;
    color: rgba(255,255,255,.5);
    line-height: 1.7;
    max-width: 260px;
}
.footer-links h4,
.footer-contact h4,
.footer-newsletter h4 {
    font-size: .95rem;
    font-weight: 600;
    color: #F3F4F6;
    margin-bottom: .9rem;
}
.footer-links a {
    display: block;
    font-size: .86rem;
    color: rgba(255,255,255,.55);
    padding: .25rem 0;
    transition: color .25s, padding-left .25s;
}
.footer-links a:hover {
    color: var(--amber);
    padding-left: 4px;
}
.footer-contact p {
    font-size: .86rem;
    color: rgba(255,255,255,.55);
    line-height: 1.8;
}
.footer-newsletter p {
    font-size: .82rem;
    color: rgba(255,255,255,.45);
    margin-bottom: .6rem;
    line-height: 1.6;
}
.footer-newsletter .newsletter-form {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
}
.footer-newsletter input {
    flex: 1;
    min-width: 140px;
    height: 44px;
    padding: 0 .9rem;
    border-radius: .65rem;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.12);
    color: #F3F4F6;
    font-size: .85rem;
    transition: border-color .25s, box-shadow .25s;
}
.footer-newsletter input::placeholder { color: rgba(255,255,255,.35); }
.footer-newsletter input:focus {
    outline: none;
    border-color: var(--amber);
    box-shadow: 0 0 0 3px rgba(232,163,61,.15);
}
.footer-newsletter button {
    height: 44px;
    padding: 0 1rem;
    border-radius: .65rem;
    background: var(--amber);
    color: #11161F;
    font-weight: 600;
    cursor: pointer;
    transition: all .25s;
    border: none;
    font-size: .85rem;
}
.footer-newsletter button:hover {
    background: var(--amber-light);
    box-shadow: 0 0 14px var(--glow);
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 1.2rem 0;
}
.footer-bottom .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: .4rem;
}
.footer-bottom p {
    font-size: .8rem;
    color: rgba(255,255,255,.4);
    text-align: center;
}

/* 通用section标题 */
.section-head {
    margin-bottom: 2rem;
}
.section-head h2 {
    font-size: clamp(1.4rem, 2.6vw, 2rem);
    font-weight: 800;
    color: var(--text);
    line-height: 1.3;
}
.section-head h2 .text-amber { color: var(--amber-dark); }
.section-head p {
    color: var(--text-soft);
    font-size: .92rem;
    margin-top: .3rem;
}

/* 入场动效 */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .5s ease, transform .5s ease;
}
.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 焦点可见 */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 2px;
}

/* 移动端微调 */
@media (max-width: 639.98px) {
    .video-info { padding: .85rem .9rem .95rem; }
    .btn-lg { padding: .85rem 1.4rem; font-size: .96rem; }
    .newsletter-form button { width: 100%; }
    .footer-bottom .container { flex-direction: column; gap: .2rem; }
}