/* roulang page: index */
:root {
    --color-primary: #7A2E8E;
    --color-primary-600: #5B1D6B;
    --color-primary-light: #9D4EDD;
    --color-accent: #F59E0B;
    --color-accent-deep: #EA8A00;
    --color-green: #2DD4BF;
    --color-bg: #15121D;
    --color-bg-soft: #F8F4F9;
    --color-surface: #FFFFFF;
    --color-dark: #17101D;
    --color-text: #25142A;
    --color-muted: #6E6370;
    --color-soft-line: rgba(122, 46, 142, .10);
    --radius-card: 20px;
    --shadow-card: 0 6px 24px rgba(60, 20, 72, .08);
    --shadow-card-hover: 0 18px 42px rgba(60, 20, 72, .14);
  }

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

  html { scroll-behavior: smooth; }

  body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    background: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  img { display: block; max-width: 100%; height: auto; }
  a { color: inherit; text-decoration: none; }
  button, input, select, textarea { font: inherit; }
  h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
  ul, ol { list-style: none; }

  a:focus-visible,
  button:focus-visible,
  summary:focus-visible {
    outline: 3px solid rgba(245, 158, 11, .5);
    outline-offset: 3px;
    border-radius: 8px;
  }

  .container {
    width: min(1140px, 100% - 2rem);
    margin-inline: auto;
  }

  .section { padding: clamp(3.8rem, 8vw, 5.8rem) 0; position: relative; }
  .section-sm { padding: 3rem 0; }
  .section-dark { background: var(--color-dark); color: #F7F1F8; }
  .section-soft { background: var(--color-bg-soft); }
  .section-white { background: #ffffff; }

  .section-head {
    max-width: 780px;
    margin: 0 auto 2.8rem;
    text-align: center;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--color-accent);
    background: rgba(245, 158, 11, .10);
    padding: .35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    text-transform: none;
  }

  .section-title {
    font-size: clamp(1.65rem, 3.2vw, 2.35rem);
    line-height: 1.35;
    font-weight: 700;
    color: inherit;
  }

  .section-head p {
    margin-top: .9rem;
    font-size: 1rem;
    color: inherit;
    opacity: .78;
  }

  /* 导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 111;
    background: linear-gradient(120deg, #4C1D95 0%, #6D28D9 45%, #8B2A96 100%);
    box-shadow: 0 8px 26px rgba(50, 15, 70, .25);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    min-height: 74px;
    gap: .25rem 1rem;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    padding: .35rem 0;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, #FFFFFF, #FAE8FF);
    color: var(--color-primary);
    display: inline-grid;
    place-items: center;
    font-weight: 900;
    font-size: 1.25rem;
    line-height: 1;
    box-shadow: 0 6px 16px rgba(0, 0, 0, .16);
  }

  .brand-text {
    color: #fff;
    font-size: 1.06rem;
    font-weight: 600;
    letter-spacing: .02em;
  }

  .brand-text em {
    font-style: normal;
    color: #FFD66B;
    font-weight: 800;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: .25rem;
    margin-left: auto;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, .88);
    padding: .55rem 1.05rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: .93rem;
    transition: background .24s ease, color .24s ease, transform .24s ease;
  }

  .nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, .16);
  }

  .nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, .25);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .10);
  }

  .header-cta {
    margin-left: .5rem;
  }

  .menu-toggle {
    display: none;
    width: 46px;
    height: 44px;
    border: 0;
    border-radius: 14px;
    background: rgba(255, 255, 255, .18);
    color: #fff;
    font-size: 1.2rem;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background .2s;
  }

  .menu-toggle:hover { background: rgba(255, 255, 255, .3); }

  @media (max-width: 767px) {
    .menu-toggle {
      display: inline-flex;
    }

    .main-nav {
      display: none;
      width: 100%;
      order: 3;
      flex-direction: column;
      align-items: stretch;
      gap: .5rem;
      background: #fff;
      border-radius: 18px;
      padding: 1rem;
      margin: .4rem 0 1rem;
      box-shadow: 0 20px 44px rgba(40, 12, 55, .22);
    }

    .nav-open .main-nav {
      display: flex;
    }

    .nav-link {
      color: var(--color-dark);
      justify-content: center;
      padding: .75rem 1rem;
    }

    .nav-link:hover,
    .nav-link.active {
      background: #F6E9FA;
      color: var(--color-primary);
    }

    .header-cta {
      margin: .25rem 0 0;
      width: 100%;
    }
  }

  /* 按钮 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    border-radius: 999px;
    border: 0;
    padding: .72rem 1.4rem;
    font-weight: 700;
    font-size: .95rem;
    line-height: 1.4;
    cursor: pointer;
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
    white-space: nowrap;
  }

  .btn:active { transform: scale(.97); }

  .btn-accent {
    background: linear-gradient(135deg, #FFC34D, #F59E0B);
    color: #331A00;
    box-shadow: 0 10px 26px rgba(245, 158, 11, .35);
  }

  .btn-accent:hover {
    transform: scale(1.02);
    box-shadow: 0 14px 32px rgba(245, 158, 11, .45);
  }

  .btn-light {
    background: #fff;
    color: var(--color-primary);
    box-shadow: 0 10px 24px rgba(0, 0, 0, .18);
  }

  .btn-light:hover {
    transform: scale(1.02);
    box-shadow: 0 14px 30px rgba(0, 0, 0, .22);
  }

  .btn-outline-light {
    background: rgba(255, 255, 255, .08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .65);
  }

  .btn-outline-light:hover {
    background: rgba(255, 255, 255, .18);
    transform: scale(1.02);
  }

  .btn-lg { padding: .9rem 1.8rem; font-size: 1.02rem; }
  .btn-sm { padding: .58rem 1.05rem; font-size: .9rem; }

  .btn-default {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 10px 24px rgba(122, 46, 142, .3);
  }

  .btn-default:hover {
    background: var(--color-primary-600);
    transform: scale(1.02);
    box-shadow: 0 14px 30px rgba(122, 46, 142, .4);
  }

  /* Hero */
  .hero {
    position: relative;
    padding: clamp(4rem, 8vw, 6rem) 0;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    color: #fff;
    overflow: hidden;
  }

  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(circle at 75% 20%, rgba(157, 78, 221, .45), transparent 42%),
      linear-gradient(90deg, rgba(20, 10, 30, .94) 0%, rgba(35, 12, 45, .86) 55%, rgba(22, 8, 34, .78) 100%);
  }

  .hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("/assets/images/backpic/back-1.jpg");
    background-size: cover;
    background-position: center;
    opacity: .18;
    mix-blend-mode: screen;
    pointer-events: none;
  }

  .hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 980px;
  }

  .hero h1 {
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: .01em;
    margin-bottom: 1.3rem;
    text-wrap: balance;
  }

  .hero-lead {
    font-size: 1.05rem;
    line-height: 1.9;
    color: rgba(255, 255, 255, .85);
    max-width: 720px;
    margin: 0 auto 2rem;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .8rem;
    margin-bottom: 2rem;
  }

  .hero-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .6rem;
    margin-bottom: 2.2rem;
  }

  .hero-badges li {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    font-size: .84rem;
    font-weight: 600;
    background: rgba(255, 255, 255, .10);
    border: 1px solid rgba(255, 255, 255, .16);
    padding: .35rem .9rem;
    border-radius: 999px;
    color: #fff;
  }

  .hero-badges i {
    color: #FFD66B;
  }

  .refresh-counter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: .65rem;
    background: rgba(255, 255, 255, .10);
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: 999px;
    padding: .7rem 1.25rem;
    font-size: .9rem;
    color: #fff;
  }

  .refresh-counter strong {
    color: #FFD66B;
    font-variant-numeric: tabular-nums;
    font-size: 1rem;
  }

  .pulse-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-green);
    box-shadow: 0 0 0 0 rgba(45, 212, 191, .55);
    animation: pulse 1.8s infinite;
  }

  @keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(45, 212, 191, .5); }
    70% { box-shadow: 0 0 0 9px rgba(45, 212, 191, 0); }
    100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0); }
  }

  /* 卡片通用 */
  .icon-card,
  .feature-card,
  .metric-card,
  .testimonial-card {
    background: var(--color-surface);
    border: 1px solid var(--color-soft-line);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
  }

  .icon-card:hover,
  .feature-card:hover,
  .metric-card:hover,
  .testimonial-card:hover {
    transform: translateY(-5px);
    border-color: rgba(122, 46, 142, .26);
    box-shadow: var(--shadow-card-hover);
  }

  /* 痛点卡片 */
  .pain-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2.4rem;
  }

  .icon-card {
    padding: 1.7rem;
  }

  .icon-badge {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: #F5E8FA;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 1.1rem;
  }

  .icon-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: .8rem;
  }

  .icon-card p {
    font-size: .92rem;
    line-height: 1.8;
    color: var(--color-muted);
    margin-bottom: 1rem;
  }

  .icon-card .solve-line {
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-primary);
    background: #F9F0FC;
    border-radius: 12px;
    padding: .7rem .9rem;
  }

  @media (max-width: 860px) {
    .pain-grid { grid-template-columns: 1fr; }
    .hero-badges { flex-direction: column; align-items: center; }
  }

  /* 解决方案区 */
  .split-grid {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: 2.2rem;
    align-items: center;
  }

  .visual-panel {
    position: relative;
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  }

  .visual-panel img {
    width: 100%;
    aspect-ratio: 16 / 11;
    object-fit: cover;
  }

  .visual-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 12, 52, .18);
    transition: background .3s ease;
  }

  .visual-panel:hover .visual-overlay {
    background: rgba(37, 12, 52, .34);
  }

  .play-circle {
    width: 62px;
    height: 62px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .92);
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: 0 12px 26px rgba(0, 0, 0, .25);
  }

  .visual-caption {
    position: absolute;
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    background: rgba(22, 8, 32, .7);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: .85rem;
    padding: .6rem .9rem;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, .18);
  }

  .feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .feature-card {
    background: rgba(255, 255, 255, .05);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 16px;
    padding: 1.3rem;
    color: #fff;
  }

  .feature-card .icon-badge {
    width: 44px;
    height: 44px;
    font-size: 1rem;
    background: rgba(255, 255, 255, .12);
    color: #FFD66B;
    border-radius: 12px;
    margin-bottom: .8rem;
  }

  .feature-card h3 {
    font-size: 1.02rem;
    font-weight: 700;
    margin-bottom: .4rem;
  }

  .feature-card p {
    font-size: .88rem;
    line-height: 1.75;
    color: rgba(255, 255, 255, .72);
  }

  @media (max-width: 900px) {
    .split-grid { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
  }

  /* 三步 */
  .step-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
    margin-top: 1rem;
  }

  .step-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--color-soft-line);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 2rem 1.6rem 1.7rem;
  }

  .step-num {
    position: absolute;
    top: 1rem;
    right: 1.3rem;
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1;
    color: rgba(122, 46, 142, .12);
  }

  .step-card h3 {
    position: relative;
    font-size: 1.16rem;
    font-weight: 700;
    margin-bottom: .7rem;
    padding-left: 1.2rem;
  }

  .step-card h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: .35rem;
    width: 7px;
    height: 1.2em;
    border-radius: 9px;
    background: var(--color-accent);
  }

  .step-card p {
    color: var(--color-muted);
    font-size: .93rem;
    line-height: 1.8;
  }

  @media (max-width: 860px) {
    .step-grid { grid-template-columns: 1fr; }
  }

  /* 数据成果 */
  .metric-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
  }

  .metric-card {
    padding: 2rem 1.6rem;
    text-align: center;
    background: linear-gradient(180deg, #FFFFFF, #FDF9FF);
  }

  .metric-num {
    font-size: clamp(1.6rem, 3.4vw, 2.6rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-primary);
  }

  .metric-num small {
    font-size: .5em;
    display: block;
    color: var(--color-muted);
    font-weight: 600;
  }

  .metric-card .metric-title {
    font-weight: 700;
    font-size: 1.08rem;
    margin: 1rem 0 .5rem;
  }

  .metric-card .metric-desc {
    color: var(--color-muted);
    font-size: .9rem;
    line-height: 1.8;
  }

  @media (max-width: 860px) {
    .metric-grid { grid-template-columns: 1fr; }
  }

  /* 证言 */
  .voices-wrap {
    display: grid;
    grid-template-columns: .78fr 1.22fr;
    gap: 2rem;
    align-items: start;
  }

  .rating-summary {
    background: rgba(255, 255, 255, .07);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 22px;
    padding: 1.8rem;
    color: #fff;
    text-align: center;
    margin-bottom: 1.2rem;
  }

  .rating-stars {
    color: #FFC53D;
    font-size: 1.2rem;
    letter-spacing: .12em;
    margin-bottom: .6rem;
  }

  .rating-num {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.2;
  }

  .rating-num span {
    font-size: 1rem;
    font-weight: 500;
    color: rgba(255, 255, 255, .7);
  }

  .voices-aside p {
    color: rgba(255, 255, 255, .82);
    font-size: 1rem;
    line-height: 1.9;
  }

  .testimonials-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.1rem;
  }

  .testimonial-card {
    padding: 1.5rem;
    background: rgba(255, 255, 255, .05);
    border-color: rgba(255, 255, 255, .08);
    color: #fff;
  }

  .testimonial-card .quote {
    font-size: .94rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, .84);
    margin-bottom: 1.2rem;
  }

  .testimonial-user {
    display: flex;
    align-items: center;
    gap: .7rem;
  }

  .avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    flex-shrink: 0;
    background: linear-gradient(135deg, #F59E0B, #9D4EDD);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .testimonial-user strong {
    display: block;
    font-size: .9rem;
  }

  .badge {
    display: inline-block;
    font-size: .75rem;
    color: var(--color-primary);
    background: #F3E7F7;
    border-radius: 999px;
    padding: .2rem .7rem;
    font-weight: 600;
  }

  .testimonial-card .badge {
    background: rgba(255, 199, 61, .14);
    color: #FFD66B;
    margin-left: auto;
  }

  @media (max-width: 900px) {
    .voices-wrap { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
  }

  /* 资讯 */
  .insight-list {
    display: flex;
    flex-direction: column;
    gap: .6rem;
  }

  .insight-item {
    display: flex;
    gap: 1rem;
    background: #fff;
    border: 1px solid var(--color-soft-line);
    border-radius: 18px;
    padding: 1.1rem 1.2rem;
    transition: box-shadow .25s, transform .25s;
    align-items: flex-start;
  }

  .insight-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-card);
  }

  .insight-date {
    color: var(--color-accent-deep);
    font-size: .8rem;
    font-weight: 700;
    min-width: 64px;
    padding-top: .1rem;
  }

  .insight-main h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: .25rem;
  }

  .insight-main p {
    font-size: .87rem;
    color: var(--color-muted);
    line-height: 1.6;
  }

  .recommend-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .recommend-card {
    display: flex;
    gap: 1rem;
    background: #fff;
    border: 1px solid var(--color-soft-line);
    border-radius: 18px;
    padding: .8rem;
    transition: box-shadow .25s, transform .25s;
    align-items: stretch;
  }

  .recommend-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
  }

  .recommend-card img {
    width: 106px;
    height: 82px;
    object-fit: cover;
    border-radius: 12px;
  }

  .recommend-card h3 {
    font-size: .95rem;
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: .2rem;
  }

  .recommend-card span {
    font-size: .8rem;
    color: var(--color-muted);
  }

  .insight-grid {
    display: grid;
    grid-template-columns: 1.35fr .75fr;
    gap: 1.2rem;
  }

  @media (max-width: 900px) {
    .insight-grid { grid-template-columns: 1fr; }
    .insight-item { flex-direction: column; }
    .recommend-card img { width: 90px; height: 72px; }
  }

  /* FAQ */
  .faq-wrap {
    max-width: 860px;
    margin: 2.4rem auto 0;
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--color-soft-line);
    border-radius: 18px;
    margin-bottom: .8rem;
    transition: box-shadow .25s;
  }

  .faq-item[open] {
    box-shadow: var(--shadow-card);
    border-color: rgba(122, 46, 142, .28);
  }

  .faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    cursor: pointer;
    padding: 1.15rem 1.35rem;
    font-weight: 700;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
  }

  .faq-item summary::-webkit-details-marker { display: none; }

  .faq-icon {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    border-radius: 50%;
    background: #F5E8FA;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: transform .3s ease, background .3s;
  }

  .faq-item[open] .faq-icon {
    transform: rotate(45deg);
    background: var(--color-primary);
    color: #fff;
  }

  .faq-answer {
    padding: .2rem 1.4rem 1.4rem;
    color: var(--color-muted);
    font-size: .95rem;
    line-height: 1.9;
  }

  /* CTA 下载 */
  .download-cta {
    position: relative;
    color: #fff;
    text-align: center;
    padding: clamp(4.2rem, 8vw, 6rem) 0;
    background-image: linear-gradient(135deg, rgba(35, 18, 48, .96), rgba(80, 30, 88, .92)), url("/assets/images/backpic/back-3.jpg");
    background-size: cover;
    background-position: center;
    overflow: hidden;
  }

  .download-cta::before {
    content: "";
    position: absolute;
    inset: auto 0 0 auto;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(245, 158, 11, .19), transparent 68%);
    pointer-events: none;
  }

  .download-cta h2 {
    font-size: clamp(1.7rem, 3.4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 1.1rem;
  }

  .download-cta p {
    max-width: 620px;
    margin: 0 auto 2rem;
    color: rgba(255, 255, 255, .78);
    font-size: 1.02rem;
    line-height: 1.9;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .8rem;
    justify-content: center;
    margin-bottom: 1.6rem;
    position: relative;
  }

  .cta-note {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .8rem;
    color: rgba(255, 255, 255, .78);
    font-size: .85rem;
  }

  .cta-note i {
    color: #FFD66B;
    margin-right: .35rem;
  }

  /* 页脚 */
  .site-footer {
    background: #120A17;
    color: rgba(255, 255, 255, .72);
    padding: 3.8rem 0 1.8rem;
    font-size: .9rem;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.3fr .8fr 1fr;
    gap: 2.4rem;
    margin-bottom: 2.6rem;
  }

  .footer-grid h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: .9rem;
  }

  .footer-about p {
    margin-top: .75rem;
    font-size: .92rem;
    line-height: 1.9;
  }

  .footer-links a,
  .footer-tags a {
    display: inline-flex;
    color: rgba(255, 255, 255, .72);
    transition: color .2s, transform .2s;
  }

  .footer-links a {
    margin: .2rem 0;
    padding: .15rem 0;
  }

  .footer-links a:hover {
    color: #FFD66B;
    transform: translateX(3px);
  }

  .footer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
  }

  .footer-tags a {
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .09);
    padding: .3rem .8rem;
    border-radius: 999px;
    font-size: .8rem;
    transition: background .2s;
  }

  .footer-tags a:hover {
    background: rgba(255, 255, 255, .13);
    color: #fff;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    gap: .8rem;
    flex-wrap: wrap;
    font-size: .82rem;
    color: rgba(255, 255, 255, .48);
  }

  @media (max-width: 860px) {
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
  }

/* roulang page: category1 */
:root {
    --color-primary: #7A2E8E;
    --color-primary-600: #5B1D6B;
    --color-primary-light: #9D4EDD;
    --color-accent: #F59E0B;
    --color-accent-deep: #EA8A00;
    --color-green: #2DD4BF;
    --color-bg: #15121D;
    --color-bg-soft: #F8F4F9;
    --color-surface: #FFFFFF;
    --color-dark: #17101D;
    --color-text: #25142A;
    --color-muted: #6E6370;
    --color-soft-line: rgba(122, 46, 142, .10);
    --radius-card: 20px;
    --shadow-card: 0 6px 24px rgba(60, 20, 72, .08);
    --shadow-card-hover: 0 18px 42px rgba(60, 20, 72, .14);
}
/* roulang page: category1 */
:root {
    --color-primary: #7A2E8E;
    --color-primary-600: #5B1D6B;
    --color-primary-light: #9D4EDD;
    --color-accent: #F59E0B;
    --color-accent-deep: #EA8A00;
    --color-green: #2DD4BF;
    --color-bg: #15121D;
    --color-bg-soft: #F8F4F9;
    --color-surface: #FFFFFF;
    --color-dark: #17101D;
    --color-text: #25142A;
    --color-muted: #6E6370;
    --color-soft-line: rgba(122, 46, 142, .10);
    --radius-card: 20px;
    --shadow-card: 0 6px 24px rgba(60, 20, 72, .08);
    --shadow-card-hover: 0 18px 42px rgba(60, 20, 72, .14);
}
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    background: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(245, 158, 11, .5);
    outline-offset: 3px;
    border-radius: 8px;
}
.container {
    width: min(1140px, 100% - 2rem);
    margin-inline: auto;
}
.section { padding: clamp(3.8rem, 8vw, 5.8rem) 0; position: relative; }
.section-sm { padding: 3rem 0; }
.section-dark { background: var(--color-dark); color: #F7F1F8; }
.section-soft { background: var(--color-bg-soft); }
.section-white { background: #ffffff; }
.section-head {
    max-width: 780px;
    margin: 0 auto 2.8rem;
    text-align: center;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--color-accent);
    background: rgba(245, 158, 11, .10);
    padding: .35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    text-transform: none;
}
.section-title {
    font-size: clamp(1.65rem, 3.2vw, 2.35rem);
    line-height: 1.35;
    font-weight: 700;
    color: inherit;
}
.section-head p {
    margin-top: .9rem;
    font-size: 1rem;
    color: inherit;
    opacity: .78;
}

/* 导航 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 111;
    background: linear-gradient(120deg, #4C1D95 0%, #6D28D9 45%, #8B2A96 100%);
    box-shadow: 0 8px 26px rgba(50, 15, 70, .25);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    min-height: 74px;
    gap: .25rem 1rem;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    padding: .35rem 0;
}
.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, #FFFFFF, #FAE8FF);
    color: var(--color-primary);
    display: inline-grid;
    place-items: center;
    font-weight: 900;
    font-size: 1.25rem;
    line-height: 1;
    box-shadow: 0 6px 16px rgba(0, 0, 0, .16);
}
.brand-text {
    color: #fff;
    font-size: 1.06rem;
    font-weight: 600;
    letter-spacing: .02em;
}
.brand-text em {
    font-style: normal;
    color: #FFD66B;
    font-weight: 800;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: .25rem;
    margin-left: auto;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, .88);
    padding: .55rem 1.05rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: .93rem;
    transition: background .24s ease, color .24s ease, transform .24s ease;
}
.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, .16);
}
.nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, .25);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .10);
}
.header-cta {
    margin-left: .5rem;
}
.menu-toggle {
    display: none;
    width: 46px;
    height: 44px;
    border: 0;
    border-radius: 14px;
    background: rgba(255, 255, 255, .18);
    color: #fff;
    font-size: 1.2rem;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background .2s;
}
.menu-toggle:hover { background: rgba(255, 255, 255, .3); }
.menu-toggle {
    display: inline-flex;
}
.main-nav {
    display: none;
    width: 100%;
    order: 3;
    flex-direction: column;
    align-items: stretch;
    gap: .5rem;
    background: #fff;
    border-radius: 18px;
    padding: 1rem;
    margin: .4rem 0 1rem;
    box-shadow: 0 20px 44px rgba(40, 12, 55, .22);
}
.nav-open .main-nav {
    display: flex;
}
.nav-link {
    color: var(--color-dark);
    justify-content: center;
    padding: .75rem 1rem;
}
.nav-link:hover,
.nav-link.active {
    background: #F6E9FA;
    color: var(--color-primary);
}
.header-cta {
    margin: .25rem 0 0;
    width: 100%;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    border-radius: 999px;
    border: 0;
    padding: .72rem 1.4rem;
    font-weight: 700;
    font-size: .95rem;
    line-height: 1.4;
    cursor: pointer;
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
    white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn-accent {
    background: linear-gradient(135deg, #FFC34D, #F59E0B);
    color: #331A00;
    box-shadow: 0 10px 26px rgba(245, 158, 11, .35);
}
.btn-accent:hover {
    transform: scale(1.02);
    box-shadow: 0 14px 32px rgba(245, 158, 11, .45);
}
.btn-light {
    background: #fff;
    color: var(--color-primary);
    box-shadow: 0 10px 24px rgba(0, 0, 0, .18);
}
.btn-light:hover {
    transform: scale(1.02);
    box-shadow: 0 14px 30px rgba(0, 0, 0, .22);
}
.btn-outline-light {
    background: rgba(255, 255, 255, .08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .65);
}
.btn-outline-light:hover {
    background: rgba(255, 255, 255, .18);
    transform: scale(1.02);
}
.btn-lg { padding: .9rem 1.8rem; font-size: 1.02rem; }
.btn-sm { padding: .58rem 1.05rem; font-size: .9rem; }
.btn-default {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 10px 24px rgba(122, 46, 142, .3);
}
.btn-default:hover {
    background: var(--color-primary-600);
    transform: scale(1.02);
    box-shadow: 0 14px 30px rgba(122, 46, 142, .4);
}

/* 卡片 */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .9rem;
    color: var(--color-muted);
    margin-bottom: 1rem;
}
.breadcrumb a {
    color: var(--color-muted); 
    transition: color .2s;
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: rgba(255,255,255,.6); }
.breadcrumb .current { color: rgba(255,255,255,.95); font-weight: 600; }

/* 分类页横幅 */
.cat-hero {
    background: linear-gradient(135deg, #221830 0%, #2D1542 40%, #3B1B55 100%), url('/assets/images/backpic/back-2.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
    color: #f5ecf8;
    padding: clamp(3rem, 6vw, 4.6rem) 0;
}
.cat-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(23, 12, 30, .9), rgba(23, 12, 30, .55) 55%, rgba(23, 12, 30, .2));
}
.cat-hero .container { position: relative; z-index: 2; }

/* 分类筛选工具条 */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: .6rem;
}
.filter-btn {
    padding: .55rem 1.3rem;
    border-radius: 999px;
    border: 1px solid var(--color-soft-line);
    background: #fff;
    color: var(--color-muted);
    font-weight: 600;
    font-size: .9rem;
    cursor: pointer;
    transition: all .22s ease;
}
.filter-btn:hover {
    border-color: var(--color-primary-light);
    color: var(--color-primary);
    background: #F9F0FC;
}
.filter-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    box-shadow: 0 6px 16px rgba(122, 46, 142, .25);
}

/* 视频卡片网格 */
.video-card {
    display: flex;
    flex-direction: row;
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(122, 46, 142, .08);
    box-shadow: var(--shadow-card);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    min-height: 200px;
}
.video-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
}
.video-thumb {
    flex: 0 0 280px;
    max-width: 46%;
    position: relative;
    background: var(--color-dark);
    overflow: hidden;
}
.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .45s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.07); }
.play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(23, 12, 30, 0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .3s ease;
}
.play-overlay i {
    color: #fff;
    font-size: 1.5rem;
    width: 58px;
    height: 58px;
    background: rgba(245, 158, 11, 0);
    border-radius: 50%;
    display: grid;
    place-items: center;
    transform: scale(.85);
    opacity: 0;
    transition: all .28s ease;
    border: 2px solid #fff;
}
.video-card:hover .play-overlay { background: rgba(23, 12, 30, .35); }
.video-card:hover .play-overlay i { opacity: 1; transform: scale(1); background: rgba(245, 158, 11, .85); }
.video-card:active .play-overlay i { transform: scale(.9); }
.video-info {
    flex: 1;
    padding: 1.25rem 1.4rem;
    display: flex;
    flex-direction: column;
}
.video-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.45;
    margin-bottom: .5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.video-desc {
    font-size: .9rem;
    color: var(--color-muted);
    line-height: 1.6;
    margin-bottom: .8rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .6rem;
    margin-top: auto;
    align-items: center;
}
.video-badge {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .72rem;
    font-weight: 600;
    background: var(--color-bg-soft);
    color: var(--color-primary);
    padding: .2rem .8rem;
    border-radius: 999px;
    border: 1px solid var(--color-soft-line);
}
.video-duration {
    margin-left: auto;
    background: rgba(23, 12, 30, .8);
    color: #FFD66B;
    font-size: .8rem;
    font-weight: 600;
    padding: .15rem .7rem;
    border-radius: 999px;
}

/* 分页 */
.pagination {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    padding-top: 2rem;
}
.page-link {
    min-width: 42px;
    height: 42px;
    display: inline-grid;
    place-items: center;
    background: #fff;
    border: 1px solid var(--color-soft-line);
    border-radius: 50%;
    font-weight: 600;
    font-size: .92rem;
    color: var(--color-muted);
    padding: 0 .9rem;
    transition: all .2s ease;
}
.page-link:hover {
    border-color: var(--color-primary-light);
    color: var(--color-primary);
    background: #F9F0FC;
}
.page-link.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    box-shadow: 0 6px 18px rgba(122, 46, 142, .35);
}

/* FAQ手风琴 */
.faq-accordion {
    max-width: 760px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-card);
    margin-bottom: 1rem;
    border: 1px solid rgba(122, 46, 142, .06);
    transition: border-color .2s;
    overflow: hidden;
}
.faq-item summary {
    list-style: none;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.02rem;
    transition: background .25s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item[open] summary { background: #F9F0FC; }
.faq-ico {
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: #F2DFF7;
    color: var(--color-primary);
    transition: transform .25s ease;
    font-size: .95rem;
}
.faq-item[open] .faq-ico { transform: rotate(45deg); }
.faq-body {
    padding: 0 1.5rem 1.35rem;
    color: var(--color-muted);
    font-size: .95rem;
    line-height: 1.75;
}

/* CTA */
.cta-section {
    background: linear-gradient(120deg, #221827, #351B4A 55%, #4A2066);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.cta-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 15%, rgba(245, 158, 11, .18), transparent 38%),
                radial-gradient(circle at 10% 85%, rgba(157, 78, 221, .2), transparent 40%);
    pointer-events: none;
}

/* 页脚 */
.site-footer {
    background: #120B16;
    color: #B9AEBE;
    padding: 3.2rem 0 1.4rem;
    font-size: .9rem;
    line-height: 1.7;
}
.site-footer .brand-text { color: #fff; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1.4fr;
    gap: 2.5rem;
    padding-bottom: 2.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.footer-about p {
    margin-top: 1rem;
    max-width: 380px;
    opacity: .7;
}
.site-footer h3 {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 1.2rem;
    font-weight: 300px;
    font-weight: 700;
    opacity: .92;
}
.footer-links a {
    color: #B9AEBE;
    transition: color .2s;
}
.footer-links a:hover {
    color: var(--color-accent);
}
.footer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem .5rem;
}
.footer-tags a {
    font-size: .8rem;
    background: rgba(255, 255, 255, .05);
    padding: .2rem .8rem;
    border-radius: 999px;
    color: #B9AEBE;
    transition: all .2s ease;
    border: 1px solid rgba(255,255,255,.06);
}
.footer-tags a:hover {
    background: rgba(245, 158, 11, .12);
    color: #FFD66B;
}
.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem 1.4rem;
    justify-content: space-between;
    padding-top: 1.6rem;
    font-size: .82rem;
    opacity: .6;
}

/* 装饰小徽章 */
.star-rate {
    display: inline-flex;
    gap: .15rem;
    color: #F59E0B;
    font-size: .92rem;
}

/* 客服/浮动 */
.float-tip {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: .6rem;
    align-items: flex-end;
}
.float-tip a {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    box-shadow: 0 10px 26px rgba(40, 15, 55, .28);
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #8B2A96, #5B1D6B);
    color: #fff;
    transition: transform .2s ease;
}
.float-tip a:hover { transform: translateY(-3px); }

/* 阶段标签 */
.step-tag {
    display: inline-flex;
    width: 28px;
    height: 28px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-accent);
    color: #331A00;
    font-weight: 800;
    font-size: .85rem;
    margin-right: .5rem;
}

/* 数据卡 */
.stat-card {
    background: #fff;
    padding: 1.6rem 1.4rem;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}

/* 页码等文本溢出保护 */
.no-wrap { white-space: nowrap; }

/* 响应式增强 */
@media (min-width: 768px) {
    .menu-toggle { display: none; }
    .main-nav {
        display: flex;
        width: auto;
        order: 0;
        flex-direction: row;
        align-items: center;
        gap: .25rem;
        background: transparent;
        padding: 0;
        margin: 0;
        box-shadow: none;
    }
    .nav-link {
        color: rgba(255, 255, 255, .88);
        justify-content: center;
        padding: .55rem 1.05rem;
    }
    .nav-link:hover,
    .nav-link.active {
        background: rgba(255, 255, 255, .16);
        color: #fff;
    }
    .header-cta { margin: 0; width: auto; }
}

@media (max-width: 767px) {
    .cat-hero .container { 
        padding-top: 1rem; 
    }
    .breadcrumb-box {
        margin-bottom: .5rem;
    }
    .video-card {
        flex-direction: column;
    }
    .video-thumb {
        max-width: 100%;
        flex: 0 0 auto;
        aspect-ratio: 16 / 10;
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.8rem;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
    .brand-text { font-size: .95rem; }
}

@media (max-width: 520px) {
    .filter-btn { font-size: .82rem; padding: .5rem 1rem; }
    .header-inner { min-height: 64px; }
    .brand-mark { width: 36px; height: 36px; font-size: 1.05rem; border-radius: 12px; }
    .container { width: min(100% - 1.25rem, 1140px); }
    .video-info { padding: 1rem 1.1rem; }
    .stat-card { padding: 1.2rem; }
}

/* 视频筛选隐藏 */
.hide-video { display: none; }
.video-card { transition: opacity .25s ease; }