/* roulang page: index */
:root {
    --brand: #E0603C;
    --brand-deep: #C44A28;
    --brand-soft: rgba(224, 96, 60, .10);
    --brand-line: rgba(224, 96, 60, .30);
    --yun: #6E8B82;
    --ink: #0B0D11;
    --ink-2: #12151B;
    --paper: #F7F5F1;
    --paper-2: #EFEBE4;
    --text-1: #12151B;
    --text-2: #5B626C;
    --text-3: #8B9199;
    --on-dark: #EDEAE5;
    --on-dark-2: rgba(237, 234, 229, .66);
    --line: rgba(18, 21, 27, .10);
    --line-dark: rgba(255, 255, 255, .10);
    --r-card: 14px;
    --r-poster: 10px;
    --r-input: 10px;
    --shadow-light: 0 1px 2px rgba(18, 21, 27, .05), 0 12px 32px -16px rgba(18, 21, 27, .18);
    --shadow-dark: 0 24px 64px -20px rgba(0, 0, 0, .75);
    --ease: cubic-bezier(.22, .61, .36, 1);
  }

  * { box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--text-1);
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 17px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    font-variant-numeric: tabular-nums;
  }

  h1, h2, h3, h4, .serif {
    font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
    font-weight: 600;
  }

  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  button { font-family: inherit; cursor: pointer; }
  input { font-family: inherit; }

  a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
  }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  @media (min-width: 1280px) {
    .container { max-width: 1320px; }
  }

  /* ============ 导航 ============ */
  .nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 72px;
    z-index: 60;
    display: flex;
    align-items: center;
    transition: height .24s var(--ease), background .24s var(--ease), border-color .24s var(--ease), backdrop-filter .24s var(--ease);
    border-bottom: 1px solid transparent;
  }

  .nav.is-scrolled {
    height: 60px;
    background: rgba(11, 13, 17, .78);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom-color: var(--line-dark);
  }

  .nav-inner {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .logo {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    color: var(--on-dark);
    font-family: 'Noto Serif SC', serif;
    font-size: 21px;
    letter-spacing: .01em;
    font-weight: 600;
  }

  .logo .dot {
    width: 4px; height: 4px;
    border-radius: 999px;
    background: var(--brand);
    display: inline-block;
    transform: translateY(-3px);
  }

  .logo .sub {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 12px;
    letter-spacing: .12em;
    color: var(--on-dark-2);
    font-weight: 400;
  }

  .nav-menu {
    display: flex;
    align-items: center;
    gap: clamp(20px, 2.4vw, 36px);
    list-style: none;
    margin: 0; padding: 0;
  }

  .nav-menu a {
    position: relative;
    color: var(--on-dark-2);
    font-size: 15px;
    letter-spacing: .02em;
    padding-bottom: 4px;
    transition: color .24s var(--ease);
  }

  .nav-menu a::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 2px;
    background: var(--brand);
    transition: width .24s var(--ease);
  }

  .nav-menu a:hover { color: var(--on-dark); }
  .nav-menu a:hover::after { width: 100%; }
  .nav-menu a.is-active { color: var(--on-dark); }
  .nav-menu a.is-active::after { width: 100%; }

  .nav-tools {
    display: flex;
    align-items: center;
    gap: 18px;
  }

  .icon-btn {
    width: 38px; height: 38px;
    border-radius: 999px;
    border: 1px solid var(--line-dark);
    background: transparent;
    color: var(--on-dark-2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all .24s var(--ease);
  }

  .icon-btn:hover {
    color: var(--on-dark);
    border-color: rgba(255, 255, 255, .55);
    background: rgba(255, 255, 255, .08);
  }

  .burger {
    display: none;
    width: 40px; height: 40px;
    border: none;
    background: transparent;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  .burger span {
    display: block;
    width: 22px; height: 1.5px;
    background: var(--on-dark);
  }

  .drawer {
    position: fixed;
    inset: 0;
    height: 96vh;
    background: rgba(11, 13, 17, .98);
    z-index: 90;
    padding: 96px 24px 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity .24s var(--ease), transform .24s var(--ease), visibility .24s;
  }

  .drawer.is-open { opacity: 1; visibility: visible; transform: translateY(0); }

  .drawer-close {
    position: absolute;
    top: 24px; right: 24px;
    width: 40px; height: 40px;
    border-radius: 999px;
    border: 1px solid var(--line-dark);
    background: transparent;
    color: var(--on-dark);
    font-size: 16px;
  }

  .drawer-links { list-style: none; margin: 0; padding: 0; }
  .drawer-links li { border-bottom: 1px solid var(--line-dark); }
  .drawer-links a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 0;
    color: var(--on-dark);
    font-size: 22px;
    font-family: 'Noto Serif SC', serif;
  }
  .drawer-links a .dot {
    width: 6px; height: 6px; border-radius: 999px; background: var(--brand);
    opacity: 0;
  }
  .drawer-links a.is-active .dot { opacity: 1; }

  .drawer-foot {
    color: var(--on-dark-2);
    font-size: 13px;
    letter-spacing: .02em;
    border-top: 1px solid var(--line-dark);
    padding-top: 20px;
    line-height: 2;
  }

  /* ============ Hero ============ */
  .hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: flex-end;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    color: var(--on-dark);
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11, 13, 17, .30) 0%, rgba(11, 13, 17, .52) 46%, rgba(11, 13, 17, .93) 100%);
  }

  .hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(11, 13, 17, .76) 0%, rgba(11, 13, 17, .28) 55%, rgba(11, 13, 17, 0) 100%);
  }

  .hero-inner {
    position: relative;
    z-index: 2;
    width: 100%;
    padding-top: 140px;
  }

  .badge-line {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--line-dark);
    border-radius: 999px;
    padding: 7px 16px;
    font-size: 13px;
    letter-spacing: .08em;
    color: var(--on-dark-2);
  }

  .badge-line i { color: var(--brand); font-size: 11px; }

  .hero h1 {
    margin: 26px 0 0;
    font-size: clamp(34px, 5.2vw, 64px);
    line-height: 1.12;
    letter-spacing: -0.01em;
    max-width: 15em;
  }

  .hero-sub {
    margin: 22px 0 0;
    max-width: 34em;
    font-size: clamp(15px, 1.3vw, 18px);
    line-height: 1.85;
    color: var(--on-dark-2);
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 36px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border-radius: 999px;
    padding: 14px 30px;
    font-size: 15px;
    letter-spacing: .02em;
    border: 1px solid transparent;
    transition: all .24s var(--ease);
  }

  .btn-primary {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
  }

  .btn-primary:hover {
    background: var(--brand-deep);
    border-color: var(--brand-deep);
    box-shadow: 0 10px 28px rgba(224, 96, 60, .30);
  }

  .btn-primary:active { transform: scale(.99); }

  .btn-ghost {
    background: transparent;
    color: var(--on-dark);
    border-color: rgba(255, 255, 255, .38);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, .08);
    border-color: #fff;
  }

  .btn-dark {
    background: var(--ink-2);
    color: var(--paper);
    border-color: var(--ink-2);
  }

  .btn-dark:hover {
    background: #000;
    box-shadow: var(--shadow-light);
  }

  .hero-strip {
    margin-top: 56px;
    border-top: 1px solid var(--line-dark);
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    padding: 22px 0 30px;
  }

  .hero-strip .cell strong {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 20px;
    color: var(--on-dark);
    font-weight: 600;
  }

  .hero-strip .cell span {
    display: block;
    margin-top: 4px;
    font-size: 13px;
    letter-spacing: .06em;
    color: var(--on-dark-2);
  }

  /* ============ 通用板块 ============ */
  .section { padding: 96px 0; }
  .section-tight { padding: 72px 0; }
  .section-dark { background: var(--ink); color: var(--on-dark); }
  .section-dark-2 { background: var(--ink-2); color: var(--on-dark); }
  .section-paper { background: var(--paper); }
  .section-paper-2 { background: var(--paper-2); }

  .head-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 40px;
  }

  .head-row h2 {
    margin: 0;
    font-size: clamp(24px, 3vw, 36px);
    line-height: 1.28;
  }

  .head-row .desc {
    margin: 12px 0 0;
    color: var(--text-2);
    font-size: 15px;
    max-width: 44em;
  }

  .section-dark .head-row .desc,
  .section-dark-2 .head-row .desc { color: var(--on-dark-2); }

  .text-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    letter-spacing: .02em;
    color: var(--text-2);
    padding-bottom: 3px;
    transition: color .24s var(--ease);
  }

  .text-link::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 1px;
    background: var(--brand);
    transition: width .24s var(--ease);
  }

  .text-link:hover { color: var(--brand); }
  .text-link:hover::after { width: 100%; }
  .section-dark .text-link, .section-dark-2 .text-link { color: var(--on-dark-2); }
  .section-dark .text-link:hover, .section-dark-2 .text-link:hover { color: var(--brand); }

  /* ============ 横滑片库 ============ */
  .rail-wrap { position: relative; }

  .rail {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 4px 4px 12px;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .rail::-webkit-scrollbar { display: none; }

  .poster-card {
    flex: 0 0 240px;
    scroll-snap-align: start;
    position: relative;
    display: block;
  }

  .poster-media {
    position: relative;
    border-radius: var(--r-poster);
    overflow: hidden;
    aspect-ratio: 2 / 3;
    background: linear-gradient(160deg, #1b1f26, #0e1116);
    border: 1px solid var(--line-dark);
  }

  .poster-media img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .26s var(--ease);
  }

  .poster-card:hover .poster-media img { transform: scale(1.04); }

  .poster-card:hover .poster-media { border-color: var(--brand-line); }

  .poster-badge {
    position: absolute;
    top: 10px; left: 10px;
    z-index: 2;
    background: rgba(11, 13, 17, .66);
    backdrop-filter: blur(6px);
    border: 1px solid var(--line-dark);
    color: var(--on-dark);
    font-size: 12px;
    letter-spacing: .06em;
    padding: 3px 10px;
    border-radius: 999px;
  }

  .poster-card h3 {
    margin: 14px 0 0;
    font-size: 16px;
    line-height: 1.45;
    color: var(--on-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .poster-card p {
    margin: 6px 0 0;
    font-size: 13px;
    color: var(--on-dark-2);
    letter-spacing: .02em;
  }

  .rail-mask-left, .rail-mask-right {
    position: absolute;
    top: 0; bottom: 0;
    width: 64px;
    pointer-events: none;
    z-index: 3;
  }

  .rail-mask-left { left: 0; background: linear-gradient(90deg, var(--ink), rgba(11, 13, 17, 0)); }
  .rail-mask-right { right: 0; background: linear-gradient(270deg, var(--ink), rgba(11, 13, 17, 0)); }

  .rail-nav {
    position: absolute;
    top: 40%;
    width: 40px; height: 40px;
    border-radius: 999px;
    border: 1px solid var(--line-dark);
    background: rgba(11, 13, 17, .6);
    color: var(--on-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    z-index: 4;
    transition: all .24s var(--ease);
  }

  .rail-nav:hover { background: var(--brand); border-color: var(--brand); }
  .rail-nav.prev { left: -20px; }
  .rail-nav.next { right: -20px; }

  /* ============ 热播推荐（不对称） ============ */
  .hot-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 28px;
    align-items: stretch;
  }

  .hot-main {
    position: relative;
    border-radius: var(--r-card);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    display: block;
    border: 1px solid var(--line);
    background: var(--paper-2);
  }

  .hot-main img { width: 100%; height: 100%; object-fit: cover; transition: transform .26s var(--ease); }
  .hot-main:hover img { transform: scale(1.04); }

  .hot-main::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(11, 13, 17, .88) 0%, rgba(11, 13, 17, .30) 48%, rgba(11, 13, 17, 0) 78%);
  }

  .hot-main .cap {
    position: absolute;
    left: 28px; right: 28px; bottom: 26px;
    z-index: 2;
    color: var(--on-dark);
  }

  .hot-main .cap .tag {
    display: inline-block;
    font-size: 12px;
    letter-spacing: .08em;
    color: var(--brand);
    border-bottom: 1px solid var(--brand-line);
    padding-bottom: 2px;
  }

  .hot-main .cap h3 {
    margin: 12px 0 0;
    font-size: clamp(20px, 2.2vw, 28px);
    line-height: 1.32;
  }

  .hot-main .cap p {
    margin: 10px 0 0;
    font-size: 14px;
    color: var(--on-dark-2);
    max-width: 40em;
  }

  .hot-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-top: 1px solid var(--line);
  }

  .mini-card {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    transition: transform .24s var(--ease);
  }

  .mini-card:hover { transform: translateX(4px); }

  .mini-thumb {
    flex: 0 0 96px;
    aspect-ratio: 16 / 10;
    border-radius: 8px;
    overflow: hidden;
    background: var(--paper-2);
    border: 1px solid var(--line);
  }

  .mini-thumb img { width: 100%; height: 100%; object-fit: cover; }

  .mini-body h3 {
    margin: 0;
    font-size: 17px;
    line-height: 1.45;
  }

  .mini-body p {
    margin: 6px 0 0;
    font-size: 13px;
    color: var(--text-2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .mini-body .meta {
    margin-top: 6px;
    font-size: 13px;
    color: var(--text-3);
  }

  /* ============ 片单 A：大图文卡 ============ */
  .duo-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

  .wide-card {
    display: block;
    border-radius: var(--r-card);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-light);
    transition: transform .26s var(--ease), border-color .26s var(--ease);
  }

  .wide-card:hover { transform: translateY(-4px); border-color: var(--brand-line); }

  .wide-card .media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--paper-2); }
  .wide-card .media img { width: 100%; height: 100%; object-fit: cover; transition: transform .26s var(--ease); }
  .wide-card:hover .media img { transform: scale(1.04); }

  .wide-card .body { padding: 24px 26px 28px; }

  .wide-card .body h3 { margin: 12px 0 0; font-size: 21px; line-height: 1.4; }
  .wide-card .body p { margin: 10px 0 0; font-size: 15px; color: var(--text-2); }

  .tag-pill {
    display: inline-block;
    background: var(--brand-soft);
    color: var(--brand-deep);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 12px;
    letter-spacing: .06em;
  }

  .tag-pill.yun { background: rgba(110, 139, 130, .14); color: #4d6a62; }

  /* ============ 片单 B：编号列表 ============ */
  .num-list { border-top: 1px solid var(--line); }

  .num-row {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr) 200px 32px;
    gap: 20px;
    align-items: center;
    padding: 24px 4px;
    border-bottom: 1px solid var(--line);
    transition: background .24s var(--ease), padding .24s var(--ease);
  }

  .num-row:hover { background: rgba(224, 96, 60, .05); padding-left: 14px; padding-right: 14px; }

  .num-row .no {
    font-family: 'Noto Serif SC', serif;
    font-size: 28px;
    font-weight: 300;
    color: var(--text-3);
    letter-spacing: .02em;
  }

  .num-row h3 { margin: 0; font-size: 19px; line-height: 1.4; }
  .num-row .sum { margin: 6px 0 0; font-size: 14px; color: var(--text-2); }
  .num-row .side { font-size: 13px; color: var(--text-3); letter-spacing: .02em; }
  .num-row .arrow { color: var(--brand); font-size: 14px; text-align: right; }

  /* ============ 最新信息（CMS） ============ */
  .news-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .news-card {
    border-bottom: 1px solid var(--line);
    padding-bottom: 22px;
  }

  .news-link { display: block; height: 100%; }

  .news-cat {
    display: inline-block;
    font-size: 12px;
    letter-spacing: .08em;
    color: var(--yun);
    border: 1px solid rgba(110, 139, 130, .35);
    border-radius: 999px;
    padding: 3px 12px;
  }

  .news-title {
    margin: 14px 0 0;
    font-size: 19px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color .24s var(--ease);
  }

  .news-link:hover .news-title { color: var(--brand); }

  .news-sum {
    margin: 12px 0 0;
    font-size: 15px;
    color: var(--text-2);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .news-meta {
    margin-top: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-3);
    letter-spacing: .02em;
  }

  .news-meta .more { color: var(--brand); }

  .empty-state {
    grid-column: 1 / -1;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    text-align: center;
    border: 1px dashed var(--line);
    border-radius: var(--r-card);
    color: var(--text-2);
  }

  .empty-state i { font-size: 22px; color: var(--text-3); }
  .empty-state p { margin: 0; font-size: 15px; }

  /* ============ 数据条 ============ */
  .stat-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .stat-cell {
    padding: 8px 28px;
    border-left: 1px solid var(--line-dark);
  }

  .stat-cell:first-child { border-left: none; padding-left: 0; }

  .stat-cell .num {
    font-family: 'Noto Serif SC', serif;
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.1;
    color: var(--on-dark);
    font-weight: 600;
  }

  .stat-cell .num em { font-style: normal; font-size: 18px; color: var(--brand); margin-left: 4px; }

  .stat-cell .lb {
    margin-top: 10px;
    font-size: 13px;
    letter-spacing: .06em;
    color: var(--on-dark-2);
  }

  /* ============ FAQ ============ */
  .faq-list { border-top: 1px solid var(--line); max-width: 900px; }

  .faq-item { border-bottom: 1px solid var(--line); }

  .faq-q {
    width: 100%;
    background: transparent;
    border: none;
    padding: 24px 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    text-align: left;
    font-size: 17px;
    color: var(--text-1);
    font-family: 'Noto Serif SC', serif;
    font-weight: 600;
    transition: color .24s var(--ease);
  }

  .faq-q:hover { color: var(--brand); }

  .faq-icon {
    position: relative;
    flex: 0 0 22px;
    height: 22px;
  }

  .faq-icon::before, .faq-icon::after {
    content: '';
    position: absolute;
    left: 50%; top: 50%;
    background: var(--text-2);
    transition: transform .24s var(--ease), background .24s var(--ease);
  }

  .faq-icon::before { width: 14px; height: 1px; transform: translate(-50%, -50%); }
  .faq-icon::after { width: 1px; height: 14px; transform: translate(-50%, -50%); }

  .faq-item.is-open .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
  .faq-item.is-open .faq-icon::before { background: var(--brand); }
  .faq-item.is-open .faq-q { color: var(--brand); }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .24s var(--ease);
  }

  .faq-a-inner { padding: 0 40px 26px 4px; }
  .faq-a-inner p { margin: 0; font-size: 15px; line-height: 1.85; color: var(--text-2); }

  /* ============ CTA ============ */
  .cta {
    position: relative;
    background: var(--ink);
    color: var(--on-dark);
    overflow: hidden;
    padding: 88px 0 44px;
  }

  .cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: .14;
  }

  .cta-inner { position: relative; z-index: 2; }

  .cta h2 {
    margin: 0;
    font-size: clamp(24px, 3vw, 38px);
    line-height: 1.3;
    max-width: 20em;
  }

  .cta p.lead {
    margin: 16px 0 0;
    color: var(--on-dark-2);
    font-size: 16px;
    max-width: 42em;
  }

  .sub-form {
    margin-top: 34px;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    max-width: 620px;
  }

  .sub-input {
    flex: 1 1 260px;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--line-dark);
    color: var(--on-dark);
    padding: 12px 2px;
    font-size: 15px;
    border-radius: 0;
    transition: border-color .24s var(--ease);
  }

  .sub-input::placeholder { color: rgba(237, 234, 229, .45); }
  .sub-input:focus { border-bottom-color: var(--brand); outline: none; }

  .sub-note {
    margin-top: 14px;
    font-size: 13px;
    color: var(--on-dark-2);
  }

  .cta-foot {
    margin-top: 64px;
    border-top: 1px solid var(--line-dark);
    padding-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 32px;
    font-size: 13px;
    color: var(--on-dark-2);
    letter-spacing: .02em;
  }

  /* ============ 页脚 ============ */
  .footer {
    background: var(--ink);
    color: var(--on-dark-2);
    padding: 72px 0 0;
    font-size: 14px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 0;
  }

  .footer-col {
    padding: 0 28px;
    border-left: 1px solid var(--line-dark);
  }

  .footer-col:first-child { border-left: none; padding-left: 0; }

  .footer-logo {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    color: var(--on-dark);
    font-family: 'Noto Serif SC', serif;
    font-size: 20px;
    font-weight: 600;
  }

  .footer-logo .dot { width: 4px; height: 4px; border-radius: 999px; background: var(--brand); display: inline-block; transform: translateY(-3px); }
  .footer-logo .sub { font-family: 'Noto Sans SC', sans-serif; font-size: 12px; letter-spacing: .12em; color: var(--on-dark-2); font-weight: 400; }

  .footer-col p.intro { margin: 18px 0 0; line-height: 1.9; max-width: 26em; }

  .footer h4 {
    color: var(--on-dark);
    font-size: 15px;
    margin: 0 0 18px;
    letter-spacing: .04em;
  }

  .footer ul { list-style: none; margin: 0; padding: 0; }
  .footer ul li { margin-bottom: 12px; }
  .footer ul a { transition: color .24s var(--ease); }
  .footer ul a:hover { color: var(--brand); }

  .footer .contact-line { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 12px; }
  .footer .contact-line i { color: var(--brand); font-size: 13px; margin-top: 6px; }

  .footer-sub {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    border-bottom: 1px solid var(--line-dark);
    padding-bottom: 10px;
  }

  .footer-sub input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--on-dark);
    font-size: 14px;
    outline: none;
  }

  .footer-sub input::placeholder { color: rgba(237, 234, 229, .45); }

  .footer-sub button {
    border: none;
    border-radius: 999px;
    background: var(--brand);
    color: #fff;
    font-size: 13px;
    padding: 8px 18px;
    transition: background .24s var(--ease);
  }

  .footer-sub button:hover { background: var(--brand-deep); }

  .footer-bottom {
    margin-top: 56px;
    border-top: 1px solid var(--line-dark);
    padding: 20px 0 26px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 28px;
    justify-content: space-between;
    font-size: 12px;
    letter-spacing: .02em;
  }

  .footer-bottom a { transition: color .24s var(--ease); }
  .footer-bottom a:hover { color: var(--brand); }

  .footer-friends { display: flex; flex-wrap: wrap; gap: 8px 18px; }

  /* ============ 响应式 ============ */
  @media (max-width: 1023px) {
    .section { padding: 72px 0; }
    .hot-grid { grid-template-columns: minmax(0, 1fr); }
    .duo-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 32px; }
    .stat-cell:nth-child(3) { border-left: none; padding-left: 0; }
    .rail-nav { display: none; }
    .num-row { grid-template-columns: 56px minmax(0, 1fr) 28px; }
    .num-row .side { display: none; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 40px; }
    .footer-col:nth-child(3) { border-left: none; padding-left: 0; }
  }

  @media (max-width: 767px) {
    body { font-size: 16px; }
    .nav-menu, .nav-tools { display: none; }
    .burger { display: flex; }
    .hero { min-height: 520px; }
    .hero-inner { padding-top: 120px; }
    .hero-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 16px; margin-top: 40px; }
    .poster-card { flex: 0 0 62vw; }
    .section { padding: 56px 0; }
    .section-tight { padding: 48px 0; }
    .head-row { margin-bottom: 28px; }
    .news-grid { grid-template-columns: minmax(0, 1fr); }
    .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stat-cell { padding: 8px 18px; }
    .footer { padding-top: 56px; }
    .footer-grid { grid-template-columns: minmax(0, 1fr); }
    .footer-col { border-left: none; padding: 0; border-top: 1px solid var(--line-dark); padding-top: 28px; }
    .footer-col:first-child { border-top: none; padding-top: 0; }
    .cta { padding: 64px 0 36px; }
    .faq-a-inner { padding-right: 8px; }
    .hero-actions .btn { width: 100%; justify-content: center; }
  }

/* roulang page: category1 */
:root{
  --primary:#E0603C;
  --primary-d:#C44A28;
  --secondary:#6E8B82;
  --ink:#0B0D11;
  --ink-2:#12151B;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --text-1:#12151B;
  --text-2:#5B626C;
  --text-3:#8B9199;
  --on-dark:#EDEAE5;
  --on-dark-2:rgba(237,234,229,.66);
  --line:rgba(18,21,27,.10);
  --line-dark:rgba(255,255,255,.10);
  --r-card:14px;
  --r-poster:10px;
  --r-btn:999px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(18,21,27,.05), 0 12px 32px -16px rgba(18,21,27,.18);
  --sh-2:0 24px 64px -20px rgba(0,0,0,.75);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
.site-page{
  font-family:var(--sans);
  color:var(--text-1);
  background:var(--paper);
  line-height:1.8;
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;margin:0;letter-spacing:-0.005em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease)}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}

.container{
  width:100% !important;
  max-width:1200px !important;
  margin:0 auto !important;
  padding:0 24px !important;
}
@media (min-width:1280px){
  .container{max-width:1320px !important;}
}

/* ============ 导航 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:72px;display:flex;align-items:center;
  background:rgba(247,245,241,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:height .26s var(--ease),background .26s var(--ease),box-shadow .26s var(--ease);
}
.nav.is-scrolled{height:60px;background:rgba(247,245,241,.96);box-shadow:0 10px 30px -24px rgba(18,21,27,.5)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
.logo{
  display:inline-flex;align-items:baseline;gap:6px;
  font-family:var(--serif);font-size:20px;color:var(--text-1);white-space:nowrap;
}
.logo .dot{width:4px;height:4px;border-radius:50%;background:var(--primary);display:inline-block;transform:translateY(-2px)}
.logo .sub{font-family:var(--sans);font-size:12px;letter-spacing:.14em;color:var(--text-2)}
.nav-menu{display:flex;align-items:center;gap:clamp(20px,2.4vw,36px)}
.nav-menu a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:14.5px;letter-spacing:.02em;color:var(--text-2);
}
.nav-menu a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--primary);border-radius:2px;transition:width .24s var(--ease);
}
.nav-menu a:hover{color:var(--text-1)}
.nav-menu a:hover::after{width:100%}
.nav-menu a.is-active{color:var(--text-1)}
.nav-menu a.is-active::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:16px}
.icon-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1.5px solid var(--line);border-radius:50%;color:var(--text-2);font-size:13px;
  transition:border-color .24s var(--ease),color .24s var(--ease),background .24s var(--ease);
}
.icon-btn:hover{border-color:var(--text-1);color:var(--text-1);background:rgba(18,21,27,.03)}
.burger{display:none;width:40px;height:40px;border:0;background:transparent;padding:0;position:relative}
.burger span{
  position:absolute;left:10px;right:10px;height:1.5px;background:var(--text-1);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.burger span:nth-child(1){top:16px}
.burger span:nth-child(2){top:23px}
.burger.is-open span:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
.burger.is-open span:nth-child(2){transform:translateY(-3.5px) rotate(-45deg)}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:99;background:var(--ink);
  padding:104px 24px 32px;display:flex;flex-direction:column;justify-content:space-between;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-links{display:flex;flex-direction:column;gap:26px}
.drawer-links a{
  font-family:var(--serif);font-size:22px;color:var(--on-dark);
  display:flex;align-items:center;gap:12px;
}
.drawer-links a.is-active{color:#fff}
.drawer-links a.is-active::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);display:inline-block;
}
.drawer-foot{color:var(--on-dark-2);font-size:13px;letter-spacing:.02em;line-height:2}
.drawer-foot span{display:block}
@media (max-width:767px){
  .nav-menu{display:none}
  .burger{display:block}
}

/* ============ 页面头部横幅 ============ */
.page-head{
  background:var(--paper-2);
  padding:136px 0 46px;
  border-bottom:1px solid var(--line);
}
.page-head-inner{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:end}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--r-btn);
  background:rgba(224,96,60,.10);color:var(--primary-d);
  font-size:12.5px;letter-spacing:.06em;
}
.page-head h1{
  margin:18px 0 12px;
  font-size:clamp(30px,4vw,46px);line-height:1.2;letter-spacing:-0.01em;
}
.page-head .lead{font-size:15.5px;color:var(--text-2);max-width:560px;line-height:1.9}
.page-head-meta{display:flex;gap:0}
.meta-item{padding:0 28px;border-left:1px solid var(--line)}
.meta-item:first-child{border-left:0;padding-left:0}
.meta-item b{
  display:block;font-family:var(--serif);font-size:32px;line-height:1.2;
  font-variant-numeric:tabular-nums;color:var(--text-1);
}
.meta-item span{font-size:13px;letter-spacing:.02em;color:var(--text-3)}
@media (max-width:1023px){
  .page-head{padding:120px 0 38px}
  .page-head-inner{grid-template-columns:1fr;gap:26px}
  .meta-item b{font-size:26px}
}
@media (max-width:520px){
  .page-head{padding:104px 0 32px}
  .page-head h1{font-size:27px}
  .meta-item{padding:0 18px}
  .meta-item b{font-size:23px}
}

/* ============ 片库主体 ============ */
.library{background:var(--paper);padding:56px 0 84px}
.lib-bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding-bottom:28px;border-bottom:1px solid var(--line);
}
.chips{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.chip{
  padding:8px 18px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:transparent;
  font-size:13.5px;letter-spacing:.02em;color:var(--text-2);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.chip:hover{border-color:rgba(18,21,27,.28);color:var(--text-1)}
.chip.is-active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 10px 24px -14px rgba(224,96,60,.85)}
.chip:active{transform:scale(.98)}
.lib-count{font-size:13px;letter-spacing:.02em;color:var(--text-3);font-variant-numeric:tabular-nums}

.poster-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:34px 24px;margin-top:38px;
}
.poster-card{transition:transform .26s var(--ease),opacity .26s var(--ease)}
.poster-card.is-hidden{display:none}
.poster-card:hover{transform:translateY(-4px)}
.poster-link{display:block;border-radius:var(--r-poster)}
.poster-media{
  position:relative;aspect-ratio:2/3;border-radius:var(--r-poster);overflow:hidden;
  background:var(--paper-2);border:1px solid var(--line);
}
.poster-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.poster-card:hover .poster-media img{transform:scale(1.04)}
.poster-card:hover .poster-media{box-shadow:var(--sh-1);outline:1px solid rgba(224,96,60,.30)}
.badge{
  position:absolute;left:10px;top:10px;
  padding:4px 10px;border-radius:var(--r-btn);
  background:rgba(11,13,17,.72);color:#fff;
  font-size:11.5px;letter-spacing:.06em;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.poster-title{
  margin-top:14px;font-family:var(--sans);font-size:16px;font-weight:500;line-height:1.5;
  color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.poster-card:hover .poster-title{color:var(--primary-d)}
.poster-meta{
  margin-top:8px;font-size:13px;letter-spacing:.02em;color:var(--text-3);
  font-variant-numeric:tabular-nums;display:flex;align-items:center;gap:8px;
}
.poster-meta i{font-style:normal;color:rgba(18,21,27,.22)}
@media (max-width:1023px){
  .poster-grid{grid-template-columns:repeat(3,1fr);gap:30px 20px}
}
@media (max-width:767px){
  .library{padding:40px 0 64px}
  .poster-grid{grid-template-columns:repeat(2,1fr);gap:24px 14px;margin-top:28px}
  .poster-title{font-size:14.5px;margin-top:10px}
  .poster-meta{font-size:12px;gap:6px}
  .lib-bar{padding-bottom:22px}
  .chip{padding:7px 14px;font-size:13px}
}

.pager{
  display:flex;align-items:center;justify-content:center;gap:10px;
  margin-top:56px;padding-top:30px;border-top:1px solid var(--line);
}
.pager a{
  min-width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;border:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);font-variant-numeric:tabular-nums;
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.pager a:hover{border-color:var(--text-1);color:var(--text-1)}
.pager a.is-current{background:var(--text-1);border-color:var(--text-1);color:#fff}
.pager .pager-arrow{color:var(--text-3)}

/* ============ 数据条 ============ */
.metrics{background:var(--ink);color:var(--on-dark);padding:64px 0}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.metric{padding:0 28px;border-left:1px solid var(--line-dark)}
.metric:first-child{border-left:0;padding-left:0}
.metric b{
  display:block;font-family:var(--serif);font-size:clamp(30px,3.4vw,44px);
  line-height:1.15;color:#fff;font-variant-numeric:tabular-nums;
}
.metric span{display:block;margin-top:8px;font-size:13px;letter-spacing:.02em;color:var(--on-dark-2)}
@media (max-width:767px){
  .metrics{padding:48px 0}
  .metrics-grid{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .metric{padding:0 20px}
  .metric:nth-child(odd){border-left:0;padding-left:0}
}

/* ============ 路径说明（不对称图文） ============ */
.howto{background:var(--paper);padding:92px 0}
.howto-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:68px;align-items:center}
.sec-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.1em;color:var(--secondary);
}
.sec-label::before{content:"";width:20px;height:1px;background:var(--secondary);display:inline-block}
.howto h2{
  margin:16px 0 14px;font-size:clamp(24px,3vw,36px);line-height:1.28;
}
.howto .desc{font-size:15.5px;line-height:1.9;color:var(--text-2);max-width:520px}
.path-list{margin-top:34px}
.path-list li{
  display:grid;grid-template-columns:132px 1fr;gap:24px;
  padding:22px 0;border-top:1px solid var(--line);
}
.path-list li:last-child{border-bottom:1px solid var(--line)}
.path-tag{
  font-size:14px;font-weight:500;color:var(--text-1);letter-spacing:.02em;
  display:inline-flex;align-items:center;gap:8px;
}
.path-tag::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--primary);display:inline-block}
.path-list p{font-size:14.5px;line-height:1.85;color:var(--text-2)}
.howto-media{
  aspect-ratio:16/9;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:var(--paper-2);box-shadow:var(--sh-1);
}
.howto-media img{width:100%;height:100%;object-fit:cover}
@media (max-width:1023px){
  .howto{padding:68px 0}
  .howto-inner{grid-template-columns:1fr;gap:40px}
  .howto-media{order:-1}
}
@media (max-width:520px){
  .path-list li{grid-template-columns:1fr;gap:8px}
}

/* ============ FAQ ============ */
.faq-sec{background:var(--paper-2);padding:88px 0}
.faq-head{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:end;margin-bottom:36px}
.faq-head h2{font-size:clamp(24px,3vw,36px);line-height:1.28;margin-top:14px}
.faq-head .desc{font-size:15px;color:var(--text-2);max-width:420px;line-height:1.85}
.faq-list{border-bottom:1px solid var(--line)}
.faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:24px;
  padding:24px 0;background:none;border:0;text-align:left;
  font-size:17px;font-weight:500;color:var(--text-1);line-height:1.5;
  font-family:var(--sans);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--primary-d)}
.faq-icon{position:relative;flex:0 0 14px;width:14px;height:14px;margin-top:6px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--text-2);transition:transform .24s var(--ease),background .24s var(--ease);
}
.faq-icon::before{left:0;top:6px;width:14px;height:1.5px}
.faq-icon::after{left:6px;top:0;width:1.5px;height:14px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-icon::before{background:var(--primary)}
.faq-item.is-open .faq-q{color:var(--text-1)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{
  padding:0 0 26px;max-width:760px;
  font-size:15px;line-height:1.85;color:var(--text-2);
}
@media (max-width:767px){
  .faq-sec{padding:64px 0}
  .faq-head{grid-template-columns:1fr;gap:12px}
  .faq-q{font-size:16px;padding:20px 0}
}

/* ============ 窄 CTA ============ */
.mini-cta{background:var(--paper);border-top:1px solid var(--line);padding:44px 0}
.mini-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.mini-cta p{font-size:15.5px;color:var(--text-2)}
.mini-cta strong{font-family:var(--serif);font-weight:500;color:var(--text-1)}
.link-arrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14.5px;color:var(--text-1);position:relative;padding-bottom:3px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--primary);transition:width .24s var(--ease);
}
.link-arrow:hover{color:var(--primary-d)}
.link-arrow:hover::after{width:100%}
.link-arrow i{font-size:12px;transition:transform .24s var(--ease)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ 页脚 ============ */
.footer{background:var(--ink);padding:72px 0 26px;color:var(--on-dark)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr}
.footer-col{padding:0 32px;border-left:1px solid var(--line-dark)}
.footer-col:first-child{border-left:0;padding-left:0}
.footer-col:last-child{padding-right:0}
.footer-logo{
  display:inline-flex;align-items:baseline;gap:6px;
  font-family:var(--serif);font-size:20px;color:#fff;
}
.footer-logo .dot{width:4px;height:4px;border-radius:50%;background:var(--primary);display:inline-block;transform:translateY(-2px)}
.footer-logo .sub{font-family:var(--sans);font-size:12px;letter-spacing:.14em;color:var(--on-dark-2)}
.footer .intro{margin-top:16px;font-size:14px;line-height:1.9;color:var(--on-dark-2);max-width:300px}
.footer-col h4{
  font-family:var(--sans);font-size:13px;font-weight:500;letter-spacing:.12em;
  color:rgba(237,234,229,.55);margin-bottom:18px;
}
.footer-col ul li{margin-bottom:11px}
.footer-col ul li a{font-size:14.5px;color:var(--on-dark-2);position:relative}
.footer-col ul li a:hover{color:#fff}
.contact-line{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--on-dark-2);margin-bottom:11px}
.contact-line i{font-size:12.5px;color:rgba(237,234,229,.45);width:14px}
.footer-sub{display:flex;align-items:center;gap:10px;margin-top:18px;border-bottom:1px solid var(--line-dark);padding-bottom:8px}
.footer-sub input{flex:1;background:transparent;border:0;outline:none;color:#fff;font-size:14px;min-width:0}
.footer-sub input::placeholder{color:rgba(237,234,229,.42)}
.footer-sub button{
  border:0;border-radius:var(--r-btn);background:var(--primary);color:#fff;
  font-size:13px;padding:8px 18px;letter-spacing:.02em;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.footer-sub button:hover{background:var(--primary-d)}
.footer-sub button:active{transform:scale(.98)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line-dark);
  font-size:12px;letter-spacing:.02em;color:rgba(237,234,229,.5);
}
.footer-friends{display:flex;gap:20px;flex-wrap:wrap}
.footer-friends a:hover{color:var(--on-dark)}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px 0}
  .footer-col{padding:0 24px}
  .footer-col:nth-child(odd){border-left:0;padding-left:0}
  .footer-col:nth-child(even){padding-right:0}
}
@media (max-width:640px){
  .footer{padding:56px 0 22px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-col{padding:0;border-left:0;border-top:1px solid var(--line-dark);padding-top:26px}
  .footer-col:first-child{border-top:0;padding-top:0}
  .footer-bottom{margin-top:36px}
}

/* roulang page: article */
:root{
  --brand:#E0603C;
  --brand-dark:#C44A28;
  --brand-soft:rgba(224,96,60,.10);
  --teal:#6E8B82;
  --ink:#0B0D11;
  --ink-2:#12151B;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --text-1:#12151B;
  --text-2:#5B626C;
  --text-3:#8B9199;
  --on-dark:#EDEAE5;
  --on-dark-2:rgba(237,234,229,.66);
  --line:rgba(18,21,27,.10);
  --line-dark:rgba(255,255,255,.10);
  --r:14px;
  --r-sm:10px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(18,21,27,.05),0 12px 32px -16px rgba(18,21,27,.18);
  --shadow-2:0 10px 28px rgba(224,96,60,.30);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;background:var(--paper);color:var(--text-1);font-family:var(--font-sans);font-size:16px;line-height:1.7;letter-spacing:.01em;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
::selection{background:rgba(224,96,60,.18)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1280px){.container{max-width:1320px}}
@media (max-width:520px){.container{padding:0 20px}}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;z-index:99;background:#fff;padding:8px 14px;border-radius:8px}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(247,245,241,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:clamp(16px,3vw,40px);height:var(--nav-h)}
.logo{display:inline-flex;align-items:baseline;gap:7px;font-family:var(--font-serif);font-weight:600;font-size:21px;color:var(--text-1);letter-spacing:.01em;white-space:nowrap}
.logo .dot{width:4px;height:4px;border-radius:50%;background:var(--brand);display:inline-block;transform:translateY(-4px)}
.logo .sub{font-family:var(--font-sans);font-size:12px;font-weight:400;color:var(--text-3);letter-spacing:.18em}
.nav-menu{display:flex;align-items:center;gap:clamp(18px,2.4vw,36px);list-style:none;margin:0;padding:0}
.nav-menu a{position:relative;display:inline-block;padding:6px 0;font-size:14.5px;color:var(--text-2);letter-spacing:.02em;transition:color .24s var(--ease)}
.nav-menu a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left center;transition:transform .24s var(--ease)}
.nav-menu a:hover{color:var(--text-1)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--text-1)}
.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-tools{display:flex;align-items:center;gap:14px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;border:1px solid var(--line);color:var(--text-2);font-size:13.5px;transition:color .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease)}
.icon-btn:hover{color:var(--brand);border-color:rgba(224,96,60,.5);background:var(--brand-soft)}
.burger{display:none;width:40px;height:40px;border:0;background:transparent;flex-direction:column;justify-content:center;align-items:flex-end;gap:6px}
.burger span{display:block;width:22px;height:1.5px;background:var(--text-1);transition:transform .24s var(--ease)}
.burger.is-open span:first-child{transform:translateY(3.75px) rotate(45deg)}
.burger.is-open span:last-child{transform:translateY(-3.75px) rotate(-45deg)}
@media (max-width:767px){
  .nav-inner{height:64px}
  .nav-menu{display:none}
  .burger{display:flex}
}
/* 移动端抽屉 */
.drawer{position:fixed;inset:0;z-index:80;background:rgba(11,13,17,.98);display:flex;flex-direction:column;justify-content:center;padding:0 32px;opacity:0;visibility:hidden;transform:translateY(-12px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease)}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-close{position:absolute;top:20px;right:20px;width:42px;height:42px;border-radius:50%;border:1px solid var(--line-dark);background:transparent;color:var(--on-dark);font-size:15px}
.drawer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:22px}
.drawer a{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:22px;color:var(--on-dark);transition:color .24s var(--ease)}
.drawer a:hover{color:var(--brand)}
.drawer a.is-active{color:var(--brand)}
.drawer a.is-active::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
.drawer-foot{margin-top:44px;padding-top:22px;border-top:1px solid var(--line-dark);font-size:13px;color:var(--on-dark-2)}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--paper);border-bottom:1px solid var(--line)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:16px 0;font-size:13px;color:var(--text-3);letter-spacing:.02em}
.crumb a{color:var(--text-3);border-bottom:1px solid transparent;transition:color .24s var(--ease),border-color .24s var(--ease)}
.crumb a:hover{color:var(--brand);border-bottom-color:currentColor}
.crumb .current{color:var(--text-2);max-width:min(600px,58vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头 ---------- */
.art-head{padding:56px 0 36px;background:var(--paper)}
.art-head-inner{max-width:860px}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 13px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;letter-spacing:.06em}
.art-title{margin:18px 0 0;font-family:var(--font-serif);font-weight:600;font-size:clamp(28px,3.6vw,42px);line-height:1.25;letter-spacing:-.01em;color:var(--text-1)}
.art-lead{margin:16px 0 0;font-size:17px;line-height:1.8;color:var(--text-2);max-width:760px}
.art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px;font-size:13px;color:var(--text-3);letter-spacing:.02em}
.art-meta .num{font-variant-numeric:tabular-nums}
.art-meta .sep{width:1px;height:12px;background:var(--line);display:inline-block}

/* ---------- 头图 ---------- */
.art-figure{margin:8px auto 56px}
.art-figure-frame{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r);background:var(--paper-2);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.art-figure-frame img{width:100%;height:100%;object-fit:cover}
.art-figure figcaption{margin-top:12px;text-align:center;font-size:12.5px;color:var(--text-3);letter-spacing:.02em}

/* ---------- 阅读区 ---------- */
.art-layout{display:grid;gap:56px;justify-content:center;grid-template-columns:minmax(0,1fr)}
@media (min-width:1024px){.art-layout{grid-template-columns:minmax(0,760px) 240px;align-items:start}}
.prose{font-size:17.5px;line-height:1.9;color:#22262E;overflow-wrap:break-word}
.prose>*+*{margin-top:1.4em}
.prose p{font-size:17.5px;line-height:1.9;color:#22262E}
.prose h2{margin:2.4em 0 0;padding-left:14px;border-left:3px solid var(--brand);font-family:var(--font-serif);font-weight:600;font-size:clamp(21px,2.2vw,26px);line-height:1.4;color:var(--text-1)}
.prose h3{margin:2em 0 0;font-size:19px;line-height:1.5;font-weight:600;color:var(--text-1)}
.prose ul,.prose ol{margin:1.2em 0 0;padding-left:1.4em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-top:.55em;line-height:1.85}
.prose li::marker{color:var(--brand)}
.prose blockquote{margin:1.8em 0 0;padding:16px 20px;background:var(--paper-2);border-left:3px solid var(--brand);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--text-2);font-size:16.5px}
.prose img{margin-top:1.6em;border-radius:var(--r);border:1px solid var(--line)}
.prose figure{margin-top:1.6em}
.prose figcaption{margin-top:10px;text-align:center;font-size:12.5px;color:var(--text-3)}
.prose a{color:var(--brand-dark);border-bottom:1px solid rgba(224,96,60,.4);transition:color .24s var(--ease),border-color .24s var(--ease)}
.prose a:hover{color:var(--brand);border-bottom-color:var(--brand)}
.prose table{width:100%;border-collapse:collapse;margin-top:1.8em;font-size:15px}
.prose th,.prose td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.prose th{background:var(--paper-2);font-size:14px;font-weight:600;letter-spacing:.02em}
.prose strong{font-weight:600;color:var(--ink-2)}
.prose hr{margin:2.4em 0;border:0;border-top:1px solid var(--line)}
.art-toc{display:none}
@media (min-width:1024px){
  .art-toc{display:block;position:sticky;top:calc(var(--nav-h) + 32px);padding-left:20px;border-left:1px solid var(--line)}
}
.toc-title{margin:0 0 14px;font-size:12.5px;font-weight:500;letter-spacing:.18em;color:var(--text-3)}
.art-toc ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;max-height:62vh;overflow:auto}
.art-toc a{display:block;margin-left:-21px;padding-left:10px;border-left:2px solid transparent;font-size:13.5px;line-height:1.5;color:var(--text-2);transition:color .24s var(--ease),border-color .24s var(--ease)}
.art-toc a:hover{color:var(--brand)}
.art-toc a.is-current{color:var(--brand-dark);border-left-color:var(--brand)}
.art-toc a.toc-sub{padding-left:22px;font-size:12.5px;color:var(--text-3)}

/* ---------- 文末 ---------- */
.art-foot{margin-top:64px;padding-top:32px;border-top:1px solid var(--line)}
.tags{display:flex;flex-wrap:wrap;gap:10px}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;font-size:13px;color:var(--text-2);transition:color .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease)}
.tag:hover{color:var(--brand-dark);border-color:rgba(224,96,60,.45);background:var(--brand-soft)}
.pn-card{display:flex;flex-direction:column;gap:10px;padding:22px 24px;border:1px solid var(--line);border-radius:var(--r);background:#fff;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-1);border-color:rgba(224,96,60,.35)}
.pn-label{font-size:12.5px;letter-spacing:.14em;color:var(--text-3)}
.pn-title{margin:0;font-size:17px;line-height:1.5;font-weight:600;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pn-more{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-dark)}
.back-link{display:inline-flex;align-items:center;gap:8px;margin-top:30px;font-size:14px;color:var(--text-2);transition:color .24s var(--ease)}
.back-link:hover{color:var(--brand)}

/* ---------- 通用板块 ---------- */
.sec{padding:64px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.sec-title{margin:0;font-family:var(--font-serif);font-weight:600;font-size:clamp(20px,2.2vw,26px);line-height:1.35;color:var(--text-1)}
.sec-more{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);transition:color .24s var(--ease)}
.sec-more::after{content:"→";transition:transform .24s var(--ease)}
.sec-more:hover{color:var(--brand)}
.sec-more:hover::after{transform:translateX(4px)}
.rel-card{display:block;overflow:hidden;border:1px solid var(--line);border-radius:var(--r);background:#fff;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-1);border-color:rgba(224,96,60,.35)}
.rel-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper-2)}
.rel-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.rel-card:hover .rel-cover img{transform:scale(1.04)}
.rel-body{padding:18px 20px 22px}
.rel-body h3{margin:0;font-size:16.5px;line-height:1.5;font-weight:600;color:var(--text-1)}
.rel-body p{margin:8px 0 0;font-size:13.5px;line-height:1.75;color:var(--text-2)}
.rel-body time{display:block;margin-top:12px;font-size:12.5px;color:var(--text-3);font-variant-numeric:tabular-nums}

/* ---------- FAQ ---------- */
.faq{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.faq-list{max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;background:transparent;border:0;text-align:left;font-size:17px;font-weight:500;color:var(--text-1)}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--text-2);transition:transform .24s var(--ease),background .24s var(--ease)}
.faq-icon::before{left:0;top:8.3px;width:18px;height:1.4px}
.faq-icon::after{top:0;left:8.3px;width:1.4px;height:18px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-icon::before{background:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a p{margin:0;padding-bottom:24px;max-width:760px;font-size:15px;line-height:1.85;color:var(--text-2)}

/* ---------- CTA ---------- */
.cta{position:relative;overflow:hidden;padding:72px 0;background:var(--ink);color:var(--on-dark)}
.cta::before{content:"";position:absolute;inset:0;background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;opacity:.14}
.cta-inner{position:relative;display:grid;gap:32px;grid-template-columns:minmax(0,1fr)}
@media (min-width:1024px){.cta-inner{grid-template-columns:1.05fr .95fr;align-items:center;gap:56px}}
.cta h2{margin:0;font-family:var(--font-serif);font-weight:600;font-size:clamp(24px,3vw,34px);line-height:1.3;color:var(--on-dark)}
.cta p{margin:14px 0 0;max-width:520px;font-size:15px;line-height:1.8;color:var(--on-dark-2)}
.cta-form{display:flex;flex-wrap:wrap;gap:12px}
.cta-form input{flex:1 1 220px;min-width:0;height:48px;padding:0 4px;background:transparent;border:0;border-bottom:1px solid var(--line-dark);color:var(--on-dark);font-size:15px;transition:border-color .24s var(--ease)}
.cta-form input::placeholder{color:rgba(237,234,229,.45)}
.cta-form input:focus{outline:none;border-bottom-color:var(--brand)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r-pill);border:1px solid transparent;font-size:14.5px;letter-spacing:.02em;transition:background .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:scale(.99)}
.btn-ghost{border-color:var(--line-dark);background:transparent;color:var(--on-dark)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff}
.form-msg{margin-top:12px;font-size:13px;color:var(--brand);letter-spacing:.02em}

/* ---------- 空态 ---------- */
.empty{max-width:600px;margin:72px auto 96px;padding:56px 32px;border:1px solid var(--line);border-radius:var(--r);background:#fff;box-shadow:var(--shadow-1);text-align:center}
.empty-icon{position:relative;width:34px;height:34px;margin:0 auto 18px;border:1.5px solid var(--text-3);border-radius:50%}
.empty-icon::after{content:"";position:absolute;right:-7px;bottom:0;width:14px;height:1.5px;background:var(--text-3);transform:rotate(45deg)}
.empty h2{margin:0;font-family:var(--font-serif);font-weight:600;font-size:22px;color:var(--text-1)}
.empty p{margin:12px 0 24px;font-size:14.5px;line-height:1.8;color:var(--text-2)}
.empty .btn{background:var(--brand);color:#fff}
.empty .btn:hover{background:var(--brand-dark);box-shadow:var(--shadow-2)}

/* ---------- 页脚 ---------- */
.footer{padding:64px 0 28px;background:var(--ink);color:var(--on-dark)}
.footer-grid{display:grid;gap:40px;grid-template-columns:minmax(0,1fr)}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}}
.footer-col{min-width:0}
@media (min-width:1024px){
  .footer-grid{gap:0}
  .footer-col{padding:0 32px;border-right:1px solid var(--line-dark)}
  .footer-col:first-child{padding-left:0}
  .footer-col:last-child{padding-right:0;border-right:0}
}
.footer-logo{display:inline-flex;align-items:baseline;gap:7px;font-family:var(--font-serif);font-size:21px;color:var(--on-dark)}
.footer-logo .dot{width:4px;height:4px;border-radius:50%;background:var(--brand);transform:translateY(-4px)}
.footer-logo .sub{font-family:var(--font-sans);font-size:12px;color:var(--on-dark-2);letter-spacing:.18em}
.footer-col .intro{margin:16px 0 0;max-width:320px;font-size:13.5px;line-height:1.85;color:var(--on-dark-2)}
.footer-col h4{margin:0 0 16px;font-size:13px;font-weight:500;letter-spacing:.16em;color:rgba(237,234,229,.5)}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.footer-col ul a{font-size:14px;color:var(--on-dark-2);transition:color .24s var(--ease)}
.footer-col ul a:hover{color:var(--brand)}
.contact-line{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:13.5px;color:var(--on-dark-2)}
.contact-line i{color:var(--brand);font-size:12.5px}
.footer-sub{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.footer-sub input{flex:1 1 140px;min-width:0;height:40px;background:transparent;border:0;border-bottom:1px solid var(--line-dark);color:var(--on-dark);font-size:13.5px;transition:border-color .24s var(--ease)}
.footer-sub input::placeholder{color:rgba(237,234,229,.4)}
.footer-sub input:focus{outline:none;border-bottom-color:var(--brand)}
.footer-sub button{height:40px;padding:0 20px;border:0;border-radius:var(--r-pill);background:var(--brand);color:#fff;font-size:13.5px;transition:background .24s var(--ease)}
.footer-sub button:hover{background:var(--brand-dark)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:48px;padding-top:20px;border-top:1px solid var(--line-dark);font-size:12.5px;color:rgba(237,234,229,.5)}
.footer-friends a{margin-left:16px;color:rgba(237,234,229,.5);transition:color .24s var(--ease)}
.footer-friends a:hover{color:var(--brand)}
@media (max-width:520px){
  .sec{padding:48px 0}
  .art-head{padding:40px 0 28px}
  .cta{padding:56px 0}
}

/* roulang page: category3 */
:root{
  --brand:#E0603C;
  --brand-deep:#C44A28;
  --brand-soft:rgba(224,96,60,.10);
  --second:#6E8B82;
  --ink:#0B0D11;
  --ink-2:#12151B;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --text-1:#12151B;
  --text-2:#5B626C;
  --text-3:#8B9199;
  --on-dark:#EDEAE5;
  --line:rgba(18,21,27,.10);
  --line-dark:rgba(255,255,255,.10);
  --radius-card:14px;
  --shadow-card:0 1px 2px rgba(18,21,27,.05),0 12px 32px -16px rgba(18,21,27,.18);
  --shadow-dark:0 24px 64px -20px rgba(0,0,0,.75);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--text-1);
  background:var(--paper);
  font-size:16.5px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:600;letter-spacing:-.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1280px){.container{max-width:1320px;}}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:70;
  background:rgba(247,245,241,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;transition:height .24s var(--ease);}
.nav.is-scrolled .nav-inner{height:60px;}
.logo,.footer-logo{
  font-family:var(--font-serif);font-size:20px;letter-spacing:-.01em;
  display:inline-flex;align-items:center;gap:6px;color:var(--text-1);
}
.logo .dot,.footer-logo .dot{width:4px;height:4px;border-radius:999px;background:var(--brand);display:inline-block;transform:translateY(1px);}
.logo .sub,.footer-logo .sub{font-family:var(--font-sans);font-size:12px;letter-spacing:.18em;color:var(--text-3);font-weight:400;}
.nav-menu{display:flex;align-items:center;gap:clamp(20px,2.4vw,36px);}
.nav-menu a{
  position:relative;font-size:14.5px;letter-spacing:.02em;color:var(--text-2);
  padding:6px 0;transition:color .24s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);border-radius:2px;
}
.nav-menu a:hover{color:var(--text-1);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.is-active{color:var(--text-1);}
.nav-menu a.is-active::after{transform:scaleX(1);}
.nav-tools{display:flex;align-items:center;gap:14px;}
.icon-btn{
  width:36px;height:36px;border:1px solid var(--line);border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:border-color .24s var(--ease),color .24s var(--ease),background .24s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.burger{display:none;width:40px;height:36px;flex-direction:column;justify-content:center;gap:6px;}
.burger span{display:block;height:1.5px;width:22px;background:var(--text-1);transition:transform .24s var(--ease),opacity .2s linear;margin-left:auto;}
.burger.is-open span:first-child{transform:translateY(3.75px) rotate(45deg);}
.burger.is-open span:last-child{transform:translateY(-3.75px) rotate(-45deg);}
.drawer{
  position:fixed;inset:0;z-index:69;background:rgba(11,13,17,.97);
  padding:104px 28px 32px;display:flex;flex-direction:column;justify-content:space-between;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-nav a{
  display:flex;align-items:center;gap:12px;color:var(--on-dark);font-family:var(--font-serif);
  font-size:22px;padding:16px 0;border-bottom:1px solid var(--line-dark);
}
.drawer-nav a i{font-size:6px;color:var(--brand);opacity:0;transition:opacity .2s;}
.drawer-nav a.is-active i{opacity:1;}
.drawer-foot{color:rgba(237,234,229,.66);font-size:13.5px;letter-spacing:.02em;line-height:2;}
@media (max-width:767px){
  .nav-menu{display:none;}
  .burger{display:flex;}
}

/* ---------- 通用 ---------- */
.sec{padding:72px 0;}
@media (max-width:767px){.sec{padding:52px 0;}}
.sec-dark{background:var(--ink);color:var(--on-dark);}
.sec-paper2{background:var(--paper-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.14em;
  color:var(--second);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--second);}
.h2{font-size:clamp(24px,3vw,36px);line-height:1.28;}
.lead{color:var(--text-2);font-size:16.5px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px;}
.more-link{
  position:relative;font-size:14px;letter-spacing:.02em;color:var(--text-2);display:inline-flex;align-items:center;gap:8px;
  transition:color .24s var(--ease);
}
.more-link::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);}
.more-link:hover{color:var(--brand);}
.more-link:hover::after{transform:scaleX(1);}
.btn{
  display:inline-flex;align-items:center;gap:10px;border-radius:999px;padding:13px 28px;
  font-size:15px;letter-spacing:.02em;transition:all .24s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px -8px rgba(224,96,60,.6);}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 10px 28px rgba(224,96,60,.30);}
.btn-primary:active{transform:scale(.99);}
.btn-ghost{border:1px solid var(--line-dark);color:var(--on-dark);}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff;}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;letter-spacing:.06em;
  color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:5px 12px;
}
.tag{display:inline-block;font-size:13px;letter-spacing:.02em;color:var(--second);border:1px solid rgba(110,139,130,.35);border-radius:999px;padding:4px 12px;}

/* ---------- 顶部横幅 ---------- */
.page-banner{border-bottom:1px solid var(--line);background:var(--paper);padding:48px 0 40px;}
.crumb{font-size:13px;color:var(--text-3);display:flex;gap:8px;align-items:center;margin-bottom:18px;}
.crumb a{transition:color .2s;}
.crumb a:hover{color:var(--brand);}
.crumb .cur{color:var(--text-2);}
.banner-inner{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.banner-title{font-size:clamp(26px,3.6vw,42px);line-height:1.22;margin:12px 0 14px;}
.banner-desc{color:var(--text-2);max-width:640px;}
.banner-stats{display:flex;gap:28px;padding-left:32px;border-left:1px solid var(--line);}
.banner-stats .num{font-family:var(--font-serif);font-size:26px;line-height:1.2;}
.banner-stats .lab{font-size:13px;color:var(--text-3);letter-spacing:.02em;}
@media (max-width:767px){
  .banner-stats{padding-left:0;border-left:none;border-top:1px solid var(--line);padding-top:20px;width:100%;gap:20px;}
}

/* ---------- 左文右图 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;}
.split-media{position:sticky;top:104px;}
.split-media figure{margin:0;}
.split-media img{border-radius:var(--radius-card);aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow-card);}
.split-media figcaption{font-size:13px;color:var(--text-3);margin-top:12px;text-align:center;}
.split-text h2{margin-bottom:20px;}
.split-text p+p{margin-top:18px;color:var(--text-2);}
.split-note{margin-top:32px;padding:20px 22px;background:var(--paper-2);border-left:3px solid var(--brand);border-radius:0 10px 10px 0;color:var(--text-2);font-size:15.5px;}
@media (max-width:1023px){
  .split{grid-template-columns:1fr;gap:36px;}
  .split-media{position:static;}
}

/* ---------- 数据条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);}
.metric{padding:0 24px;border-left:1px solid var(--line);}
.metric:first-child{border-left:none;padding-left:0;}
.metric .num{font-family:var(--font-serif);font-size:clamp(28px,3.4vw,40px);line-height:1.1;color:var(--brand);}
.metric .lab{font-size:13px;color:var(--text-2);margin-top:8px;letter-spacing:.02em;}
@media (max-width:767px){
  .metrics{grid-template-columns:repeat(2,1fr);gap:28px 0;}
  .metric:nth-child(3){border-left:none;padding-left:0;}
}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:34px;}
.timeline::before{content:"";position:absolute;left:5px;top:10px;bottom:10px;width:1px;background:var(--line);}
.tl-item{position:relative;display:grid;grid-template-columns:104px 1fr;gap:24px;padding:0 0 34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-34px;top:9px;width:11px;height:11px;border-radius:999px;
  background:var(--brand);box-shadow:0 0 0 4px rgba(224,96,60,.14);
}
.tl-date{font-size:13.5px;color:var(--text-3);letter-spacing:.04em;padding-top:2px;}
.tl-body h3{font-size:18px;line-height:1.45;margin-bottom:8px;}
.tl-body p{color:var(--text-2);font-size:15.5px;}
.tl-body .tag{margin-top:12px;}
@media (max-width:767px){
  .tl-item{grid-template-columns:1fr;gap:6px;padding-bottom:28px;}
}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;text-align:left;font-size:17px;font-family:var(--font-serif);color:var(--text-1);
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);transition:transform .24s var(--ease);}
.faq-icon::before{left:0;right:0;top:7.5px;height:1.5px;}
.faq-icon::after{top:0;bottom:0;left:7.5px;width:1.5px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a p{padding:0 0 24px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:860px;}

/* ---------- 联系表单 ---------- */
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:44px;
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px 36px;margin-top:28px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;letter-spacing:.04em;color:var(--text-3);}
.field input,.field textarea,.field select{
  border:none;border-bottom:1px solid var(--line);background:transparent;padding:10px 2px;
  font-size:15.5px;transition:border-color .24s var(--ease);
}
.field textarea{resize:vertical;min-height:88px;}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-bottom-color:var(--brand);}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:32px;flex-wrap:wrap;}
.form-note{font-size:13px;color:var(--text-3);max-width:520px;line-height:1.7;}
.form-msg{font-size:14px;color:var(--second);margin-top:14px;display:none;}
.form-msg.is-show{display:block;}
@media (max-width:767px){
  .contact-card{padding:28px 22px;}
  .form-grid{grid-template-columns:1fr;gap:24px;}
}

/* ---------- 窄 CTA ---------- */
.narrow-cta{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:32px 0;}
.narrow-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.narrow-inner p{font-family:var(--font-serif);font-size:clamp(17px,2vw,21px);}
.narrow-link{display:inline-flex;align-items:center;gap:10px;color:var(--brand);font-size:14.5px;letter-spacing:.02em;}
.narrow-link i{transition:transform .24s var(--ease);}
.narrow-link:hover i{transform:translateX(5px);}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:rgba(237,234,229,.66);padding:72px 0 28px;font-size:14.5px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:0;}
.footer-col{padding:0 28px;border-left:1px solid var(--line-dark);}
.footer-col:first-child{border-left:none;padding-left:0;}
.footer-logo{color:var(--on-dark);font-size:19px;}
.footer-logo .sub{color:rgba(237,234,229,.5);}
.footer .intro{margin-top:16px;line-height:1.9;max-width:300px;font-size:14px;}
.footer h4{color:var(--on-dark);font-size:14px;letter-spacing:.08em;font-family:var(--font-sans);font-weight:500;margin-bottom:18px;}
.footer ul li+li{margin-top:10px;}
.footer ul a{transition:color .24s var(--ease);}
.footer ul a:hover{color:var(--brand);}
.contact-line{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:14px;}
.contact-line i{color:var(--second);font-size:13px;}
.footer-sub{display:flex;gap:10px;margin-top:20px;align-items:center;}
.footer-sub input{
  flex:1;background:transparent;border:none;border-bottom:1px solid var(--line-dark);
  padding:8px 2px;font-size:14px;color:var(--on-dark);
}
.footer-sub input:focus{outline:none;border-bottom-color:var(--brand);}
.footer-sub button{
  border-radius:999px;background:var(--brand);color:#fff;font-size:13.5px;padding:8px 20px;
  transition:background .24s var(--ease);
}
.footer-sub button:hover{background:var(--brand-deep);}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(237,234,229,.5);
}
.footer-friends{display:flex;gap:18px;}
.footer-friends a:hover{color:var(--brand);}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px 0;}
  .footer-col:nth-child(3){border-left:none;padding-left:0;}
}
@media (max-width:767px){
  .footer{padding:52px 0 24px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-col{border-left:none;padding:0;}
}

/* roulang page: category2 */
:root{
  --brand:#E0603C;
  --brand-deep:#C44A28;
  --jade:#6E8B82;
  --ink:#0B0D11;
  --ink-2:#12151B;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --text-1:#12151B;
  --text-2:#5B626C;
  --text-3:#8B9199;
  --on-dark:#EDEAE5;
  --on-dark-2:rgba(237,234,229,.66);
  --line:rgba(18,21,27,.10);
  --line-dark:rgba(255,255,255,.10);
  --r-lg:14px;
  --r-poster:10px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(18,21,27,.05),0 12px 32px -16px rgba(18,21,27,.18);
  --shadow-dark:0 24px 64px -20px rgba(0,0,0,.75);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html body{
  margin:0;
  background:var(--paper);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
html img{display:block;max-width:100%;height:auto}
html h1,html h2,html h3,html h4{font-weight:600;color:inherit}
html p{margin:0}
html ul,html ol{margin:0;padding:0;list-style:none}
html button{font-family:inherit}
a{color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:rgba(224,96,60,.24)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){
  .container{max-width:1320px;padding:0 24px}
}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;
  top:0;left:0;right:0;
  height:72px;
  z-index:80;
  transition:height .26s var(--ease),background .26s var(--ease),box-shadow .26s var(--ease);
}
.nav.is-solid{
  background:rgba(247,245,241,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav.is-scrolled{
  height:60px;
  box-shadow:0 12px 32px -26px rgba(18,21,27,.55);
}
.nav-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:700;
  letter-spacing:-.005em;
  color:var(--text-1);
  text-decoration:none;
}
.logo .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);align-self:center;display:inline-block}
.logo .sub{font-family:var(--font-sans);font-size:12px;font-weight:400;letter-spacing:.16em;color:var(--text-3)}
.nav-menu{display:flex;align-items:center;gap:clamp(20px,2.4vw,36px)}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:14.5px;
  letter-spacing:.02em;
  color:var(--text-2);
  text-decoration:none;
  transition:color .22s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .26s var(--ease);
}
.nav-menu a:hover{color:var(--text-1)}
.nav-menu a:hover::after,.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--text-1)}
.nav-tools{display:flex;align-items:center;gap:14px}
.icon-btn{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:50%;
  color:var(--text-2);
  font-size:14px;
  text-decoration:none;
  transition:color .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(224,96,60,.45);background:rgba(224,96,60,.06)}
.burger{
  display:none;
  position:relative;
  width:40px;height:40px;
  border:0;background:transparent;
  cursor:pointer;
}
.burger span{
  position:absolute;left:9px;right:9px;height:1.5px;
  background:var(--text-1);
  transition:transform .24s var(--ease);
}
.burger span:nth-child(1){top:15px}
.burger span:nth-child(2){top:23px}
.burger.is-open span:nth-child(1){transform:translateY(4px) rotate(45deg)}
.burger.is-open span:nth-child(2){transform:translateY(-4px) rotate(-45deg)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;
  z-index:90;
  background:var(--ink);
  padding:96px 28px 32px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;
  transform:translateY(-14px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-list{display:flex;flex-direction:column}
.drawer-list a{
  display:flex;align-items:center;gap:12px;
  padding:16px 0;
  font-family:var(--font-serif);
  font-size:22px;
  color:var(--on-dark);
  text-decoration:none;
  border-bottom:1px solid var(--line-dark);
  transition:color .22s var(--ease);
}
.drawer-list a:hover{color:var(--brand)}
.drawer-list .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:0;transition:opacity .22s var(--ease)}
.drawer-list a.is-active .dot{opacity:1}
.drawer-foot{margin-top:auto;padding-top:28px;font-size:13px;line-height:1.9;color:var(--on-dark-2)}
.drawer-close{
  position:absolute;top:20px;right:24px;
  width:42px;height:42px;border-radius:50%;
  border:1px solid var(--line-dark);
  background:transparent;color:var(--on-dark);
  font-size:16px;cursor:pointer;
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.drawer-close:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.4)}

/* ---------- 顶部横幅 ---------- */
.page-head{
  padding:140px 0 56px;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.page-head-inner{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:56px;
}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:rgba(224,96,60,.10);
  color:var(--brand-deep);
  font-size:13px;
  letter-spacing:.02em;
}
.page-head h1{
  font-family:var(--font-serif);
  font-size:clamp(28px,3.6vw,46px);
  line-height:1.22;
  letter-spacing:-.01em;
  margin:20px 0 14px;
  max-width:17em;
}
.lede{color:var(--text-2);font-size:16px;max-width:32em}
.head-stats{display:flex;gap:clamp(24px,3vw,44px);flex-shrink:0;padding-bottom:6px}
.head-stat strong{
  display:block;
  font-family:var(--font-serif);
  font-size:clamp(24px,2.6vw,32px);
  line-height:1;
  font-variant-numeric:tabular-nums;
  color:var(--text-1);
}
.head-stat span{display:block;margin-top:10px;font-size:13px;letter-spacing:.02em;color:var(--text-3)}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:44px;
}
.section-head h2{
  font-family:var(--font-serif);
  font-size:clamp(24px,3vw,36px);
  line-height:1.28;
  letter-spacing:-.01em;
  margin:0 0 10px;
}
.section-head p{color:var(--text-2);font-size:15px;max-width:38em}
.text-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding-bottom:3px;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--text-1);
  text-decoration:none;
  white-space:nowrap;
  transition:color .24s var(--ease);
}
.text-link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:1px;background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .26s var(--ease);
}
.text-link:hover{color:var(--brand)}
.text-link:hover::after{transform:scaleX(1)}
.text-link i{font-size:12px;transition:transform .24s var(--ease)}
.text-link:hover i{transform:translateX(4px)}

/* ---------- 编辑精选大卡 ---------- */
.feature-list{display:flex;flex-direction:column;gap:76px}
.feature-card{
  display:grid;
  grid-template-columns:6fr 4fr;
  gap:clamp(28px,4vw,56px);
  align-items:center;
}
.feature-card.is-reverse{grid-template-columns:4fr 6fr}
.feature-card.is-reverse .feature-media{order:2}
.feature-media{
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--paper-2);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.feature-card:hover .feature-media{border-color:rgba(224,96,60,.32);box-shadow:0 20px 44px -22px rgba(18,21,27,.32)}
.feature-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease)}
.feature-card:hover .feature-media img{transform:scale(1.04)}
.meta{
  font-size:13px;
  letter-spacing:.02em;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.feature-body h3{
  font-family:var(--font-serif);
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.4;
  margin:12px 0 14px;
}
.feature-body p{color:var(--text-2);font-size:16px;margin-bottom:20px;max-width:34em}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.tag{
  display:inline-block;
  padding:4px 12px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--text-2);
  background:rgba(255,255,255,.6);
}

/* ---------- 深色区 ---------- */
.section-dark{
  position:relative;
  background:linear-gradient(180deg,var(--paper) 0,var(--ink) 60px,var(--ink) calc(100% - 60px),var(--paper) 100%);
  color:var(--on-dark);
  padding:104px 0;
}
.section-dark .section-head h2{color:var(--on-dark)}
.section-dark .section-head p{color:var(--on-dark-2)}
.section-dark .text-link{color:var(--on-dark)}
.section-dark .text-link:hover{color:var(--brand)}

/* ---------- 编号列表 ---------- */
.rank-list{border-top:1px solid var(--line-dark)}
.rank-list li{border-bottom:1px solid var(--line-dark)}
.rank-list a{
  display:grid;
  grid-template-columns:96px 1fr 42px;
  align-items:center;
  gap:24px;
  padding:26px 8px;
  text-decoration:none;
  color:inherit;
  transition:background .24s var(--ease),padding-left .24s var(--ease);
}
.rank-list a:hover{background:rgba(255,255,255,.045);padding-left:18px}
.rank-no{
  font-family:var(--font-serif);
  font-size:clamp(28px,3vw,40px);
  font-weight:300;
  line-height:1;
  color:rgba(237,234,229,.34);
  font-variant-numeric:tabular-nums;
  transition:color .24s var(--ease);
}
.rank-list a:hover .rank-no{color:var(--brand)}
.rank-title{
  font-family:var(--font-serif);
  font-size:19px;
  line-height:1.45;
  margin:0 0 6px;
  color:var(--on-dark);
  transition:color .24s var(--ease);
}
.rank-list a:hover .rank-title{color:var(--brand)}
.rank-desc{font-size:14px;color:var(--on-dark-2)}
.rank-arrow{
  justify-self:end;
  width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-dark);
  border-radius:50%;
  color:var(--on-dark-2);
  font-size:13px;
  transition:background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
}
.rank-list a:hover .rank-arrow{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateX(5px)}

/* ---------- 指标条 ---------- */
.metrics{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.metric{padding:34px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric strong{
  display:block;
  font-family:var(--font-serif);
  font-size:clamp(28px,3.4vw,42px);
  line-height:1;
  font-variant-numeric:tabular-nums;
  color:var(--text-1);
}
.metric strong em{font-style:normal;font-size:.5em;margin-left:2px;color:var(--text-3)}
.metric span{display:block;margin-top:12px;font-size:13px;letter-spacing:.02em;color:var(--text-3)}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.step{
  padding:30px 26px 4px;
  border-right:1px solid var(--line);
}
.step:first-child{padding-left:0}
.step:last-child{border-right:0;padding-right:0}
.step .num{
  display:block;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.step h3{
  font-family:var(--font-serif);
  font-size:18px;
  line-height:1.45;
  margin:12px 0 10px;
}
.step p{font-size:14px;line-height:1.85;color:var(--text-2)}

/* ---------- 观看需求 ---------- */
.needs{display:grid;grid-template-columns:1fr 1.5fr;gap:clamp(32px,5vw,72px);align-items:start}
.needs-intro h2{
  font-family:var(--font-serif);
  font-size:clamp(24px,3vw,34px);
  line-height:1.3;
  margin:0 0 16px;
}
.needs-intro p{font-size:15px;color:var(--text-2);max-width:24em}
.need-list{display:grid;grid-template-columns:1fr 1fr;gap:24px 40px}
.need{display:flex;gap:12px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.need i{color:var(--brand);font-size:11px;margin-top:8px;flex-shrink:0}
.need h3{font-family:var(--font-serif);font-size:17px;line-height:1.5;margin:0 0 6px}
.need p{font-size:14px;line-height:1.8;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq{max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 0;
  background:none;border:0;
  text-align:left;
  font-family:var(--font-serif);
  font-size:17px;
  line-height:1.6;
  color:var(--text-1);
  cursor:pointer;
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px;color:var(--text-2)}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  transition:transform .26s var(--ease),background .26s var(--ease);
}
.faq-icon::before{left:0;right:0;top:7.5px;height:1px}
.faq-icon::after{top:0;bottom:0;left:7.5px;width:1px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-icon{color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a p{
  margin:0 0 26px;
  font-size:15px;
  line-height:1.9;
  color:var(--text-2);
  max-width:46em;
}

/* ---------- 窄 CTA ---------- */
.narrow-cta{
  position:relative;
  background:var(--ink);
  color:var(--on-dark);
  overflow:hidden;
}
.narrow-cta::before{
  content:"";
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity:.14;
}
.narrow-cta .container{position:relative}
.narrow-inner{
  border-top:1px solid var(--line-dark);
  padding:46px 0 52px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.narrow-inner h2{
  font-family:var(--font-serif);
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.45;
  margin:0 0 8px;
  color:var(--on-dark);
}
.narrow-inner p{font-size:14px;color:var(--on-dark-2)}
.narrow-cta .text-link{color:var(--on-dark);font-size:15px}
.narrow-cta .text-link:hover{color:var(--brand)}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:var(--on-dark);padding:76px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.25fr;gap:0}
.footer-col{padding:0 32px;border-left:1px solid var(--line-dark)}
.footer-col:first-child{padding-left:0;border-left:0}
.footer-col:last-child{padding-right:0}
.footer-logo{
  display:inline-flex;align-items:baseline;gap:7px;
  font-family:var(--font-serif);
  font-size:21px;font-weight:700;
  color:var(--on-dark);
  text-decoration:none;
}
.footer-logo .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);align-self:center}
.footer-logo .sub{font-family:var(--font-sans);font-size:12px;font-weight:400;letter-spacing:.16em;color:var(--on-dark-2)}
.footer .intro{margin-top:18px;font-size:14px;line-height:1.9;color:var(--on-dark-2);max-width:30em}
.footer h4{
  font-family:var(--font-sans);
  font-size:14px;
  letter-spacing:.06em;
  margin:0 0 20px;
  color:var(--on-dark);
}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul a{
  font-size:14px;
  color:var(--on-dark-2);
  text-decoration:none;
  transition:color .22s var(--ease);
}
.footer-col ul a:hover{color:var(--brand)}
.contact-line{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--on-dark-2);margin-bottom:12px}
.contact-line i{color:var(--brand);font-size:13px;width:16px;text-align:center}
.footer-sub{
  display:flex;align-items:center;gap:10px;
  margin-top:20px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-dark);
}
.footer-sub input{
  flex:1;min-width:0;
  background:transparent;border:0;
  color:var(--on-dark);
  font-size:14px;
  padding:4px 0;
  outline:none;
}
.footer-sub input::placeholder{color:rgba(237,234,229,.42)}
.footer-sub button{
  border:0;
  border-radius:var(--r-pill);
  background:var(--brand);
  color:#fff;
  font-size:13px;
  padding:8px 20px;
  cursor:pointer;
  white-space:nowrap;
  transition:background .24s var(--ease),transform .24s var(--ease);
}
.footer-sub button:hover{background:var(--brand-deep)}
.footer-sub button:active{transform:scale(.98)}
.form-note{margin-top:10px;font-size:12px;color:rgba(237,234,229,.5);min-height:16px}
.footer-bottom{
  margin-top:56px;
  padding-top:22px;
  border-top:1px solid var(--line-dark);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  font-size:12px;
  color:rgba(237,234,229,.5);
}
.footer-friends{display:flex;gap:20px;flex-wrap:wrap}
.footer-friends a{color:rgba(237,234,229,.5);text-decoration:none;transition:color .22s var(--ease)}
.footer-friends a:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:44px 0}
  .footer-col{padding:0 24px}
  .footer-col:nth-child(odd){padding-left:0;border-left:0}
  .footer-col:nth-child(even){padding-right:0}
  .needs{grid-template-columns:1fr;gap:32px}
  .features .feature-card{gap:32px}
}
@media (max-width:767px){
  .nav-menu{display:none}
  .burger{display:block}
  .icon-btn{display:none}
  .page-head{padding:118px 0 40px}
  .page-head-inner{flex-direction:column;align-items:flex-start;gap:28px}
  .head-stats{gap:26px;flex-wrap:wrap}
  .section{padding:56px 0}
  .section-dark{padding:64px 0;background:linear-gradient(180deg,var(--paper) 0,var(--ink) 40px,var(--ink) calc(100% - 40px),var(--paper) 100%)}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:30px}
  .feature-list{gap:56px}
  .feature-card,.feature-card.is-reverse{grid-template-columns:1fr;gap:22px}
  .feature-card.is-reverse .feature-media{order:0}
  .rank-list a{grid-template-columns:46px 1fr 34px;gap:14px;padding:20px 4px}
  .rank-list a:hover{padding-left:8px}
  .rank-title{font-size:17px}
  .rank-arrow{width:34px;height:34px}
  .metrics{grid-template-columns:1fr 1fr}
  .metric{padding:26px 18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  .metric:nth-child(2n){border-right:0}
  .metric:nth-last-child(-n+2){border-bottom:0}
  .steps{grid-template-columns:1fr}
  .step{padding:24px 0;border-right:0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .need-list{grid-template-columns:1fr}
  .faq-q{font-size:16px;padding:20px 0}
  .narrow-inner{flex-direction:column;align-items:flex-start;padding:36px 0 40px}
  .footer{padding:56px 0 22px}
  .footer-grid{grid-template-columns:1fr;gap:36px 0}
  .footer-col{padding:0;border-left:0}
  .footer-bottom{margin-top:36px}
}
@media (max-width:520px){
  .logo{font-size:20px}
  .head-stats{gap:20px}
  .metric strong{font-size:26px}
}