@charset "UTF-8";
/* ==========================================================================
   天辰娱乐 · 天辰平台 —— 企业官网样式系统
   视觉语言：Paper & Cobalt（纸感底 / 钴蓝主色 / 苔青点缀 / 技术编辑风）
   结构：@layer 分层 + 设计令牌 + 组件命名（无品牌前缀，与历史模板完全区隔）
   ========================================================================== */

@layer reset, tokens, base, layout, components, motion, utilities;

/* ------------------------------- 0. 归零 -------------------------------- */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html, body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
  ol, ul { padding: 0; list-style: none; }
  img, svg, video { display: block; max-width: 100%; }
  button, input, textarea, select { font: inherit; color: inherit; }
  button { background: none; border: 0; cursor: pointer; }
  a { color: inherit; text-decoration: none; }
  table { border-collapse: collapse; width: 100%; }
}

/* ------------------------------ 1. 设计令牌 ------------------------------ */
@layer tokens {
  :root {
    /* 纸感中性色 */
    --paper: #f4f1ea;
    --paper-hi: #fbf9f4;
    --paper-lo: #e9e3d6;
    --paper-dim: #e2dbcb;
    /* 墨色 */
    --ink: #11151a;
    --ink-2: #3b444d;
    --ink-3: #6f7880;
    --ink-4: #98a0a7;
    /* 强调色 */
    --cobalt: #1b3bf0;
    --cobalt-deep: #1024b4;
    --cobalt-soft: #e6e9ff;
    --teal: #00897a;
    --teal-soft: #d9f2ee;
    --clay: #b8492a;
    /* 线 */
    --line: rgba(17, 21, 26, .13);
    --line-2: rgba(17, 21, 26, .26);
    --line-soft: rgba(17, 21, 26, .07);
    /* 字体 */
    --sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Mono", Consolas, "Courier New", monospace;
    /* 尺寸 */
    --shell: min(1280px, calc(100vw - 48px));
    --shell-narrow: min(940px, calc(100vw - 48px));
    --head-h: 72px;
    --radius: 3px;
    --ease: cubic-bezier(.2, .7, .25, 1);
  }

  @media (max-width: 720px) {
    :root { --shell: calc(100vw - 32px); --shell-narrow: calc(100vw - 32px); --head-h: 62px; }
  }
}

/* -------------------------------- 2. 基线 -------------------------------- */
@layer base {
  html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--head-h) + 16px);
  }

  body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--paper);
    background-image:
      linear-gradient(var(--line-soft) 1px, transparent 1px),
      linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
    background-size: 100% 96px, 96px 100%;
    background-position: 0 -1px, -1px 0;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.8;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
  }

  ::selection { background: var(--cobalt); color: #fff; }

  h1, h2, h3, h4 {
    font-weight: 500;
    line-height: 1.18;
    letter-spacing: -.02em;
    text-wrap: balance;
  }

  h1 { font-size: clamp(2.35rem, 5.4vw, 4.35rem); font-weight: 400; letter-spacing: -.035em; }
  h2 { font-size: clamp(1.75rem, 3.1vw, 2.65rem); }
  h3 { font-size: 1.2rem; letter-spacing: -.01em; }
  h4 { font-size: 1rem; }

  p { color: var(--ink-2); }

  strong, b { font-weight: 600; color: var(--ink); }

  em {
    font-family: Georgia, "Times New Roman", serif;
    font-style: italic;
    letter-spacing: .01em;
  }

  :focus-visible {
    outline: 2px solid var(--cobalt);
    outline-offset: 3px;
  }

  main { display: block; }
}

/* -------------------------------- 3. 布局 -------------------------------- */
@layer layout {
  .wrap { width: var(--shell); margin-inline: auto; }
  .wrap--narrow { width: var(--shell-narrow); margin-inline: auto; }

  .section { padding: clamp(64px, 8vw, 112px) 0; }
  .section--tight { padding: clamp(44px, 5vw, 68px) 0; }
  .section--line { border-top: 1px solid var(--line); }

  .skip {
    position: fixed;
    top: -100px;
    left: 16px;
    z-index: 200;
    padding: 10px 18px;
    background: var(--ink);
    color: var(--paper-hi);
    font-size: .85rem;
  }
  .skip:focus { top: 12px; }

  /* 章节头：编号 + 细线 + 标题 + 侧述 */
  .chapter {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(24px, 5vw, 72px);
    align-items: end;
    padding-bottom: 26px;
    border-bottom: 1px solid var(--line-2);
    margin-bottom: clamp(36px, 5vw, 60px);
  }
  .chapter__no {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--mono);
    font-size: .72rem;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--cobalt);
    margin-bottom: 18px;
  }
  .chapter__no::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--line);
  }
  .chapter h2 { margin-bottom: 10px; }
  .chapter__lead { font-size: 1rem; color: var(--ink-2); max-width: 40ch; }
  .chapter__side { display: flex; flex-direction: column; gap: 18px; align-items: flex-start; }
  .chapter__side p { font-size: .95rem; }

  @media (max-width: 860px) {
    .chapter { grid-template-columns: 1fr; align-items: start; gap: 18px; }
  }
}

/* ------------------------------- 4. 组件 -------------------------------- */
@layer components {
  /* 顶部细栏 */
  .strip {
    position: relative;
    z-index: 60;
    background: var(--ink);
    color: rgba(244, 241, 234, .82);
    font-size: .76rem;
    letter-spacing: .04em;
  }
  .strip__in {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 34px;
    padding-block: 6px;
  }
  .strip__in p { color: inherit; display: flex; align-items: center; gap: 10px; }
  .strip__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #45e0c0;
    box-shadow: 0 0 0 3px rgba(69, 224, 192, .18);
    animation: pulse 2.6s var(--ease) infinite;
  }
  .strip__links { display: flex; align-items: center; gap: 20px; }
  .strip__links a { opacity: .78; transition: opacity .2s; }
  .strip__links a:hover { opacity: 1; }
  .strip__tag { font-family: var(--mono); font-size: .66rem; letter-spacing: .2em; color: rgba(244, 241, 234, .42); }
  @media (max-width: 760px) { .strip__links, .strip__tag { display: none; } }

  /* 站点头 */
  .site-head {
    position: sticky;
    top: 0;
    z-index: 80;
    background: rgba(244, 241, 234, .82);
    backdrop-filter: saturate(140%) blur(14px);
    -webkit-backdrop-filter: saturate(140%) blur(14px);
    border-bottom: 1px solid var(--line);
    transition: background .3s var(--ease), box-shadow .3s var(--ease);
  }
  .site-head.is-stuck {
    background: rgba(251, 249, 244, .96);
    box-shadow: 0 12px 30px -24px rgba(17, 21, 26, .9);
  }
  .head-in {
    display: flex;
    align-items: center;
    gap: 28px;
    height: var(--head-h);
  }
  .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
  .brand__mark { width: 38px; height: 38px; }
  .brand__text { display: flex; flex-direction: column; line-height: 1.1; }
  .brand__text b { font-size: 1.06rem; font-weight: 600; letter-spacing: .06em; }
  .brand__text i {
    font-family: var(--mono);
    font-style: normal;
    font-size: .58rem;
    letter-spacing: .28em;
    color: var(--ink-3);
    margin-top: 4px;
  }

  .nav { margin-left: auto; }
  .nav ul { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 30px); }
  .nav a {
    position: relative;
    display: inline-block;
    padding: 6px 0;
    font-size: .9rem;
    color: var(--ink-2);
    transition: color .2s;
  }
  .nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--cobalt);
    transition: width .28s var(--ease);
  }
  .nav a:hover { color: var(--ink); }
  .nav a:hover::after { width: 100%; }
  .nav a.is-on { color: var(--ink); font-weight: 600; }
  .nav a.is-on::after { width: 100%; }

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

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 11px 22px;
    border: 1px solid var(--ink);
    border-radius: var(--radius);
    font-size: .88rem;
    letter-spacing: .02em;
    line-height: 1.2;
    white-space: nowrap;
    transition: background .22s var(--ease), color .22s var(--ease), border-color .22s, transform .22s var(--ease);
  }
  .btn:hover { transform: translateY(-1px); }
  .btn--solid { background: var(--ink); color: var(--paper-hi); }
  .btn--solid:hover { background: var(--cobalt); border-color: var(--cobalt); color: #fff; }
  .btn--ghost { background: transparent; color: var(--ink); }
  .btn--ghost:hover { background: var(--ink); color: var(--paper-hi); }
  .btn--key { background: var(--cobalt); border-color: var(--cobalt); color: #fff; }
  .btn--key:hover { background: var(--cobalt-deep); border-color: var(--cobalt-deep); }
  .btn--sm { padding: 8px 15px; font-size: .8rem; }
  .btn--lg { padding: 15px 30px; font-size: .95rem; }
  .btn__arrow { font-family: var(--mono); transition: transform .25s var(--ease); }
  .btn:hover .btn__arrow { transform: translateX(4px); }

  .link-line {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .88rem;
    color: var(--ink);
    border-bottom: 1px solid var(--line-2);
    padding-bottom: 3px;
    transition: color .2s, border-color .2s;
  }
  .link-line:hover { color: var(--cobalt); border-color: var(--cobalt); }

  /* 滚动进度 */
  .progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; pointer-events: none; }
  .progress span { display: block; height: 100%; width: 0; background: var(--cobalt); }

  /* 汉堡 + 抽屉 */
  .burger {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    position: relative;
  }
  .burger span {
    position: absolute;
    left: 11px;
    width: 18px;
    height: 1px;
    background: var(--ink);
    transition: transform .28s var(--ease), opacity .2s;
  }
  .burger span:nth-child(1) { top: 16px; }
  .burger span:nth-child(2) { top: 22px; }
  .burger span:nth-child(3) { top: 28px; }
  body.nav-open .burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  body.nav-open .burger span:nth-child(2) { opacity: 0; }
  body.nav-open .burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .drawer {
    position: fixed;
    inset: calc(var(--head-h) + 34px) 0 0;
    z-index: 70;
    background: var(--paper-hi);
    border-top: 1px solid var(--line);
    padding: 26px 16px 40px;
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  }
  body.nav-open .drawer { opacity: 1; visibility: visible; transform: none; }
  .drawer ul { display: grid; gap: 2px; }
  .drawer a {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 15px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 1.06rem;
  }
  .drawer a small { font-family: var(--mono); font-size: .68rem; color: var(--ink-4); letter-spacing: .1em; }
  .drawer__foot { display: grid; gap: 10px; margin-top: 26px; }

  @media (max-width: 1080px) {
    .nav { display: none; }
    .burger { display: block; }
    .head-act .btn--ghost { display: none; }
  }
  @media (max-width: 520px) {
    .head-act .btn--solid { display: none; }
    .brand__text i { display: none; }
  }

  /* 首屏 */
  .hero { position: relative; padding: clamp(36px, 5vw, 64px) 0 clamp(48px, 6vw, 84px); }
  .hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .78fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }
  .hero__kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: .7rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 26px;
  }
  .hero__kicker::before {
    content: "";
    width: 26px;
    height: 1px;
    background: var(--cobalt);
  }
  .hero h1 { margin-bottom: 26px; }
  .hero h1 .line { display: block; }
  .hero h1 .mark {
    display: inline-block;
    color: var(--cobalt);
    background-image: linear-gradient(transparent 78%, var(--teal-soft) 78%);
  }
  .hero__lead {
    max-width: 52ch;
    font-size: 1.02rem;
    line-height: 1.9;
    color: var(--ink-2);
    margin-bottom: 32px;
  }
  .hero__lead strong { color: var(--ink); }
  .hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
  .hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 34px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
    font-size: .82rem;
    color: var(--ink-3);
  }
  .hero__meta b {
    font-family: var(--mono);
    font-size: .95rem;
    color: var(--ink);
    margin-right: 4px;
  }

  /* 首屏右侧：叠层画框 */
  .plate { position: relative; }
  .plate__frame {
    position: relative;
    border: 1px solid var(--line-2);
    background: var(--paper-hi);
    padding: 10px;
  }
  .plate__frame img { width: 100%; height: auto; }
  .plate__tag {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: .62rem;
    letter-spacing: .24em;
    color: var(--ink-4);
    white-space: nowrap;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 10px;
  }
  .plate__tag::before {
    content: "";
    width: 5px;
    height: 5px;
    background: var(--cobalt);
  }
  .plate__cap {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    font-family: var(--mono);
    font-size: .64rem;
    letter-spacing: .12em;
    color: var(--ink-4);
  }
  .plate__card {
    position: absolute;
    left: -18px;
    bottom: 30px;
    width: min(230px, 72%);
    background: var(--paper-hi);
    border: 1px solid var(--line-2);
    border-left: 3px solid var(--cobalt);
    padding: 14px 16px;
    box-shadow: 0 18px 36px -28px rgba(17, 21, 26, .8);
  }
  .plate__card small {
    display: block;
    font-family: var(--mono);
    font-size: .6rem;
    letter-spacing: .16em;
    color: var(--ink-4);
    text-transform: uppercase;
    margin-bottom: 6px;
  }
  .plate__card b { display: block; font-size: .9rem; font-weight: 600; margin-bottom: 2px; }
  .plate__card span { font-size: .76rem; color: var(--ink-3); }

  @media (max-width: 940px) {
    .hero__grid { grid-template-columns: 1fr; }
    .plate { order: -1; max-width: 460px; }
    .plate__card { left: auto; right: 6px; bottom: -14px; width: 200px; }
    .hero__meta { gap: 12px 22px; }
  }

  /* 滚动字条 */
  .ticker {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--paper-hi);
    overflow: hidden;
    padding: 14px 0;
  }
  .ticker__track {
    display: flex;
    gap: 48px;
    width: max-content;
    animation: drift 42s linear infinite;
  }
  .ticker__track span {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-family: var(--mono);
    font-size: .72rem;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--ink-3);
    white-space: nowrap;
  }
  .ticker__track span::before { content: ""; width: 4px; height: 4px; background: var(--cobalt); }
  .ticker:hover .ticker__track { animation-play-state: paused; }

  /* 卡片网格（Bento） */
  .bento {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
  }
  .bento__card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 16px;
    grid-column: span 2;
    padding: clamp(22px, 2.6vw, 34px);
    background: var(--paper-hi);
    transition: background .3s var(--ease), color .3s var(--ease);
  }
  .bento__card--wide { grid-column: span 4; }
  .bento__card--half { grid-column: span 3; }
  .bento__card--full { grid-column: span 6; }
  .bento__card:hover { background: var(--ink); color: var(--paper-hi); }
  .bento__card:hover p,
  .bento__card:hover .bento__idx,
  .bento__card:hover .bento__tags li { color: rgba(244, 241, 234, .72); }
  .bento__card:hover .bento__icon { border-color: rgba(244, 241, 234, .3); color: #fff; }
  .bento__card:hover .bento__tags li { border-color: rgba(244, 241, 234, .22); }
  .bento__idx {
    font-family: var(--mono);
    font-size: .66rem;
    letter-spacing: .18em;
    color: var(--ink-4);
  }
  .bento__icon {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    color: var(--cobalt);
    transition: border-color .3s, color .3s;
  }
  .bento__icon svg { width: 22px; height: 22px; }
  .bento h3 { font-size: 1.16rem; }
  .bento p { font-size: .92rem; line-height: 1.85; color: var(--ink-2); transition: color .3s; }
  .bento__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 8px; }
  .bento__tags li {
    font-size: .72rem;
    color: var(--ink-3);
    border: 1px solid var(--line);
    border-radius: 100px;
    padding: 3px 10px;
    transition: color .3s, border-color .3s;
  }
  @media (max-width: 980px) {
    .bento { grid-template-columns: repeat(2, 1fr); }
    .bento__card, .bento__card--wide, .bento__card--half { grid-column: span 1; }
    .bento__card--full { grid-column: span 2; }
  }
  @media (max-width: 600px) {
    .bento { grid-template-columns: 1fr; }
    .bento__card, .bento__card--full { grid-column: span 1; }
  }

  /* 数据带 */
  .stats { border-block: 1px solid var(--line-2); background: var(--paper-hi); }
  .stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
  .stats__item {
    padding: clamp(26px, 3.4vw, 44px) clamp(18px, 2.4vw, 32px);
    border-left: 1px solid var(--line);
  }
  .stats__item:first-child { border-left: 0; padding-left: 0; }
  .stats__item b {
    display: block;
    font-family: var(--mono);
    font-size: clamp(1.9rem, 3.6vw, 2.9rem);
    font-weight: 400;
    letter-spacing: -.03em;
    line-height: 1;
    color: var(--ink);
  }
  .stats__item b i { font-style: normal; font-size: .5em; color: var(--cobalt); margin-left: 2px; }
  .stats__item small { display: block; margin-top: 10px; font-size: .8rem; color: var(--ink-3); letter-spacing: .04em; }
  @media (max-width: 860px) {
    .stats__grid { grid-template-columns: repeat(2, 1fr); }
    .stats__item:nth-child(3) { border-left: 0; padding-left: 0; }
    .stats__item:nth-child(n+3) { border-top: 1px solid var(--line); }
  }

  /* 方案切换器 */
  .switch { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
  .switch__menu { display: grid; border-top: 1px solid var(--line-2); }
  .switch__btn {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 14px;
    padding: 18px 4px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    color: var(--ink-3);
    transition: color .22s, padding-left .22s var(--ease);
  }
  .switch__btn small { font-family: var(--mono); font-size: .68rem; letter-spacing: .1em; color: var(--ink-4); }
  .switch__btn b { font-size: 1rem; font-weight: 500; }
  .switch__btn .arw { font-family: var(--mono); opacity: 0; transform: translateX(-4px); transition: .22s; }
  .switch__btn:hover { color: var(--ink); padding-left: 8px; }
  .switch__btn[aria-selected="true"] { color: var(--ink); padding-left: 8px; }
  .switch__btn[aria-selected="true"] small { color: var(--cobalt); }
  .switch__btn[aria-selected="true"] .arw { opacity: 1; transform: none; color: var(--cobalt); }
  .switch__panel { position: relative; }
  .switch__pane { display: none; }
  .switch__pane.is-live { display: block; animation: fade .35s var(--ease); }
  .switch__media { border: 1px solid var(--line-2); background: var(--paper-hi); padding: 8px; }
  .switch__media img { width: 100%; }
  .switch__body { padding-top: 22px; }
  .switch__body h3 { font-size: clamp(1.3rem, 2.1vw, 1.7rem); margin-bottom: 12px; }
  .switch__body p { font-size: .95rem; }
  .switch__list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; margin-top: 20px; }
  .switch__list li {
    position: relative;
    padding-left: 16px;
    font-size: .86rem;
    color: var(--ink-2);
  }
  .switch__list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .68em;
    width: 6px;
    height: 1px;
    background: var(--teal);
  }
  .switch__note {
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px dashed var(--line-2);
    font-family: var(--mono);
    font-size: .68rem;
    letter-spacing: .06em;
    color: var(--ink-4);
  }
  @media (max-width: 900px) {
    .switch { grid-template-columns: 1fr; }
    .switch__panel { margin-top: 8px; }
    .switch__list { grid-template-columns: 1fr; }
  }

  /* 流程步骤 */
  .steps { display: grid; gap: 0; border-top: 1px solid var(--line-2); }
  .step {
    display: grid;
    grid-template-columns: 90px minmax(0, .9fr) minmax(0, 1.1fr);
    gap: clamp(16px, 3vw, 44px);
    padding: 26px 0;
    border-bottom: 1px solid var(--line);
    align-items: start;
  }
  .step__no { font-family: var(--mono); font-size: .74rem; letter-spacing: .16em; color: var(--cobalt); padding-top: 6px; }
  .step h3 { font-size: 1.08rem; }
  .step p { font-size: .9rem; }
  .step small {
    display: block;
    font-family: var(--mono);
    font-size: .64rem;
    letter-spacing: .14em;
    color: var(--ink-4);
    margin-top: 8px;
  }
  @media (max-width: 760px) {
    .step { grid-template-columns: 54px 1fr; }
    .step p { grid-column: 2; }
  }

  /* 案例网格 */
  .case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .case {
    background: var(--paper-hi);
    display: flex;
    flex-direction: column;
    transition: background .3s;
  }
  .case:hover { background: #fff; }
  .case__media { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); aspect-ratio: 4 / 3; background: var(--paper); }
  .case__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
  .case:hover .case__media img { transform: scale(1.03); }
  .case__badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(251, 249, 244, .94);
    border: 1px solid var(--line);
    font-family: var(--mono);
    font-size: .62rem;
    letter-spacing: .14em;
    padding: 4px 9px;
    color: var(--ink-2);
  }
  .case__body { padding: clamp(20px, 2.4vw, 30px); display: flex; flex-direction: column; gap: 12px; flex: 1; }
  .case__kicker { font-family: var(--mono); font-size: .66rem; letter-spacing: .14em; color: var(--ink-4); }
  .case h3 { font-size: 1.15rem; }
  .case p { font-size: .9rem; }
  .case__facts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 18px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--line);
  }
  .case__facts div { font-size: .74rem; color: var(--ink-3); }
  .case__facts b { display: block; font-family: var(--mono); font-size: 1.02rem; font-weight: 500; color: var(--ink); margin-bottom: 2px; }
  @media (max-width: 760px) { .case-grid { grid-template-columns: 1fr; } }

  /* 洞察列表 */
  .news-list { border-top: 1px solid var(--line-2); }
  .news-row {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr) auto 30px;
    gap: clamp(14px, 2.4vw, 32px);
    align-items: center;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
    transition: padding-left .28s var(--ease), background .28s;
  }
  .news-row:hover { padding-left: 10px; background: rgba(255, 255, 255, .5); }
  .news-row__date { font-family: var(--mono); font-size: .74rem; color: var(--ink-4); letter-spacing: .04em; }
  .news-row h3 { font-size: 1.02rem; font-weight: 500; letter-spacing: -.01em; }
  .news-row h3 span { display: block; margin-top: 4px; font-size: .82rem; font-weight: 400; color: var(--ink-3); letter-spacing: 0; }
  .news-row__tag {
    font-size: .7rem;
    color: var(--teal);
    border: 1px solid var(--teal-soft);
    background: var(--teal-soft);
    border-radius: 100px;
    padding: 3px 10px;
    white-space: nowrap;
  }
  .news-row__arw { font-family: var(--mono); color: var(--ink-4); transition: transform .25s var(--ease), color .25s; }
  .news-row:hover .news-row__arw { transform: translateX(5px); color: var(--cobalt); }
  @media (max-width: 760px) {
    .news-row { grid-template-columns: 1fr 26px; row-gap: 8px; }
    .news-row__date { grid-column: 1; }
    .news-row h3 { grid-column: 1; }
    .news-row__tag { grid-column: 1; justify-self: start; }
    .news-row__arw { grid-column: 2; grid-row: 1; }
  }

  /* 评价 */
  .quote {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 24px;
    padding: clamp(28px, 4vw, 48px);
    border: 1px solid var(--line-2);
    background: var(--paper-hi);
  }
  .quote__mk { font-family: Georgia, serif; font-size: 4rem; line-height: .7; color: var(--cobalt); }
  .quote blockquote { font-size: clamp(1.1rem, 1.9vw, 1.45rem); line-height: 1.65; color: var(--ink); font-weight: 400; }
  .quote footer { margin-top: 18px; font-size: .82rem; color: var(--ink-3); }
  .quote footer b { color: var(--ink); font-weight: 600; }

  /* 行动条 */
  .cta { background: var(--ink); color: var(--paper-hi); position: relative; overflow: hidden; }
  .cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(620px 300px at 88% 8%, rgba(27, 59, 240, .38), transparent 60%),
      radial-gradient(420px 240px at 4% 100%, rgba(0, 137, 122, .22), transparent 62%);
    pointer-events: none;
  }
  .cta__in {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    gap: 32px;
    align-items: center;
    padding: clamp(44px, 6vw, 78px) 0;
  }
  .cta h2 { color: var(--paper-hi); margin-bottom: 14px; }
  .cta p { color: rgba(244, 241, 234, .7); max-width: 46ch; font-size: .96rem; }
  .cta__act { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
  .cta .btn { border-color: rgba(244, 241, 234, .35); color: var(--paper-hi); }
  .cta .btn:hover { background: var(--paper-hi); color: var(--ink); }
  .cta .btn--key { background: var(--paper-hi); border-color: var(--paper-hi); color: var(--ink); }
  .cta .btn--key:hover { background: #fff; }
  @media (max-width: 860px) { .cta__in { grid-template-columns: 1fr; } .cta__act { justify-content: flex-start; } }

  /* 页脚 */
  .foot { background: var(--ink); color: rgba(244, 241, 234, .68); padding-top: clamp(48px, 6vw, 76px); position: relative; overflow: hidden; }
  .foot__top { display: grid; grid-template-columns: minmax(0, 1.3fr) repeat(3, minmax(0, .7fr)); gap: clamp(28px, 4vw, 56px); padding-bottom: 48px; }
  .foot__brand { display: flex; align-items: flex-start; gap: 14px; }
  .foot__brand .brand__text b { color: var(--paper-hi); }
  .foot__brand .brand__text i { color: rgba(244, 241, 234, .42); }
  .foot__desc { margin-top: 18px; font-size: .86rem; line-height: 1.9; color: rgba(244, 241, 234, .58); max-width: 34ch; }
  .foot__col h4 {
    font-size: .72rem;
    font-family: var(--mono);
    letter-spacing: .18em;
    text-transform: uppercase;
    color: rgba(244, 241, 234, .45);
    font-weight: 400;
    margin-bottom: 16px;
  }
  .foot__col li { margin-bottom: 10px; font-size: .86rem; }
  .foot__col a { transition: color .2s; }
  .foot__col a:hover { color: var(--paper-hi); }
  .foot__giant {
    font-family: var(--mono);
    font-size: clamp(3.4rem, 12.5vw, 11rem);
    line-height: .78;
    letter-spacing: -.02em;
    color: transparent;
    -webkit-text-stroke: 1px rgba(244, 241, 234, .16);
    text-align: center;
    user-select: none;
    padding-bottom: 8px;
  }
  .foot__bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px 24px;
    padding: 18px 0 24px;
    border-top: 1px solid rgba(244, 241, 234, .12);
    font-size: .74rem;
    color: rgba(244, 241, 234, .45);
  }
  .foot__bar ul { display: flex; flex-wrap: wrap; gap: 18px; }
  .foot__bar a:hover { color: var(--paper-hi); }
  @media (max-width: 900px) {
    .foot__top { grid-template-columns: 1fr 1fr; }
    .foot__giant { font-size: 22vw; }
  }
  @media (max-width: 560px) {
    .foot__top { grid-template-columns: 1fr; }
  }

  /* 内页头 */
  .page-head { padding: clamp(48px, 6vw, 82px) 0 clamp(32px, 4vw, 52px); border-bottom: 1px solid var(--line); position: relative; }
  .page-head__grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr); gap: clamp(24px, 4vw, 56px); align-items: end; }
  .page-head h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); margin: 18px 0 16px; }
  .page-head p { max-width: 56ch; font-size: .98rem; }
  .page-head__aside { font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; color: var(--ink-4); line-height: 2.1; border-left: 1px solid var(--line-2); padding-left: 18px; }
  .page-head__aside b { color: var(--ink-2); font-weight: 500; }
  .crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: .76rem; color: var(--ink-4); }
  .crumbs a { color: var(--ink-3); }
  .crumbs a:hover { color: var(--cobalt); }
  .crumbs span::after { content: "/"; margin-left: 8px; color: var(--ink-4); }
  @media (max-width: 820px) {
    .page-head__grid { grid-template-columns: 1fr; }
    .page-head__aside { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 14px; }
  }

  /* 文章正文 */
  .article { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: clamp(28px, 4vw, 64px); align-items: start; padding-bottom: clamp(48px, 6vw, 80px); }
  .article__body { max-width: 760px; }
  .article__body > p { font-size: 1rem; line-height: 1.95; margin-bottom: 20px; }
  .article__body h2 {
    font-size: clamp(1.3rem, 2.2vw, 1.6rem);
    margin: 44px 0 16px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }
  .article__body h3 { margin: 28px 0 10px; font-size: 1.08rem; }
  .article__body ul { margin: 0 0 20px; display: grid; gap: 9px; }
  .article__body ul li { position: relative; padding-left: 18px; font-size: .95rem; color: var(--ink-2); }
  .article__body ul li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 1px; background: var(--cobalt); }
  .article__body ol { counter-reset: n; margin: 0 0 20px; display: grid; gap: 12px; }
  .article__body ol li { position: relative; padding-left: 30px; font-size: .95rem; color: var(--ink-2); counter-increment: n; }
  .article__body ol li::before {
    content: counter(n, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: .1em;
    font-family: var(--mono);
    font-size: .72rem;
    color: var(--cobalt);
  }
  .article__body blockquote {
    margin: 28px 0;
    padding: 20px 24px;
    border-left: 3px solid var(--cobalt);
    background: var(--paper-hi);
    font-size: .98rem;
    color: var(--ink);
  }
  .article__body table { margin: 24px 0; font-size: .86rem; }
  .article__body th, .article__body td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
  .article__body th { background: var(--paper-lo); font-weight: 600; color: var(--ink); }
  .article__body td { color: var(--ink-2); }
  .article__aside { position: sticky; top: calc(var(--head-h) + 24px); display: grid; gap: 22px; }
  .article__aside h4 { font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; color: var(--ink-4); text-transform: uppercase; margin-bottom: 10px; }
  .article__aside ul { display: grid; gap: 8px; }
  .article__aside li { font-size: .82rem; }
  .article__aside ul a { color: var(--ink-2); }
  .article__aside ul a:hover { color: var(--cobalt); }
  .article__aside .btn { justify-self: start; }
  .article__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
    font-family: var(--mono);
    font-size: .7rem;
    letter-spacing: .06em;
    color: var(--ink-4);
    padding: 16px 0 0;
    border-top: 1px solid var(--line);
    margin-top: 8px;
  }
  .article__figure { margin: 30px 0; }
  .article__figure img { border: 1px solid var(--line-2); }
  .article__figure figcaption { margin-top: 8px; font-size: .74rem; color: var(--ink-4); font-family: var(--mono); letter-spacing: .04em; }
  .note {
    border: 1px solid var(--line-2);
    border-left: 3px solid var(--teal);
    background: var(--paper-hi);
    padding: 16px 18px;
    font-size: .88rem;
    color: var(--ink-2);
    margin: 26px 0;
  }
  .note b { display: block; margin-bottom: 4px; font-size: .8rem; letter-spacing: .08em; color: var(--teal); font-family: var(--mono); text-transform: uppercase; }
  @media (max-width: 980px) { .article { grid-template-columns: 1fr; } .article__aside { position: static; border-top: 1px solid var(--line); padding-top: 20px; } }

  /* 常见问题 */
  .faq { border-top: 1px solid var(--line-2); }
  .faq__item { border-bottom: 1px solid var(--line); }
  .faq__q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: 100%;
    padding: 20px 0;
    text-align: left;
    font-size: 1rem;
    color: var(--ink);
  }
  .faq__q i {
    position: relative;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
  }
  .faq__q i::before, .faq__q i::after {
    content: "";
    position: absolute;
    background: var(--cobalt);
    transition: transform .28s var(--ease);
  }
  .faq__q i::before { left: 0; top: 7.5px; width: 16px; height: 1px; }
  .faq__q i::after { left: 7.5px; top: 0; width: 1px; height: 16px; }
  .faq__q[aria-expanded="true"] i::after { transform: scaleY(0); }
  .faq__a { display: none; padding: 0 0 22px; }
  .faq__a p { font-size: .93rem; max-width: 76ch; }
  .faq__item.is-open .faq__a { display: block; animation: fade .3s var(--ease); }

  /* 表单 */
  .form { display: grid; gap: 16px; }
  .form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .field { display: grid; gap: 7px; }
  .field label { font-size: .78rem; color: var(--ink-3); letter-spacing: .04em; }
  .field input, .field select, .field textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--paper-hi);
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    font-size: .92rem;
    transition: border-color .2s, background .2s;
  }
  .field textarea { min-height: 118px; resize: vertical; }
  .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--cobalt); background: #fff; outline: none; }
  .form__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
  .form__tip { font-size: .76rem; color: var(--ink-4); }
  .form__msg { font-size: .84rem; color: var(--teal); min-height: 1.2em; }
  @media (max-width: 640px) { .form__row { grid-template-columns: 1fr; } }

  /* 联系信息 */
  .info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .info { background: var(--paper-hi); padding: 24px; }
  .info small { font-family: var(--mono); font-size: .64rem; letter-spacing: .16em; color: var(--ink-4); text-transform: uppercase; }
  .info b { display: block; margin: 8px 0 4px; font-size: 1rem; font-weight: 600; }
  .info p { font-size: .86rem; }
  .info a:hover { color: var(--cobalt); }
  @media (max-width: 640px) { .info-grid { grid-template-columns: 1fr; } }

  /* 时间轴 */
  .timeline { display: grid; border-top: 1px solid var(--line-2); }
  .tl-row {
    display: grid;
    grid-template-columns: 110px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 48px);
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
  }
  .tl-row b { font-family: var(--mono); font-size: .86rem; font-weight: 400; color: var(--cobalt); padding-top: 2px; }
  .tl-row h3 { font-size: 1rem; margin-bottom: 6px; }
  .tl-row p { font-size: .88rem; }
  @media (max-width: 600px) { .tl-row { grid-template-columns: 1fr; gap: 6px; } }

  /* 标签云 / 资质 */
  .chips { display: flex; flex-wrap: wrap; gap: 10px; }
  .chips li {
    font-size: .78rem;
    color: var(--ink-2);
    border: 1px solid var(--line-2);
    border-radius: 100px;
    padding: 5px 14px;
    background: var(--paper-hi);
  }

  /* 团队/岗位卡 */
  .team { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .team article { background: var(--paper-hi); padding: 24px; }
  .team h3 { font-size: 1rem; margin-bottom: 6px; }
  .team p { font-size: .86rem; }
  .team small { font-family: var(--mono); font-size: .62rem; letter-spacing: .14em; color: var(--ink-4); display: block; margin-bottom: 10px; }
  @media (max-width: 820px) { .team { grid-template-columns: 1fr; } }

  /* 提示条 */
  .banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    border: 1px solid var(--line-2);
    border-left: 3px solid var(--cobalt);
    background: var(--paper-hi);
    padding: 16px 20px;
    font-size: .88rem;
  }
  .banner p { font-size: .88rem; }

  /* 404 */
  .notfound { min-height: 62vh; display: grid; place-items: center; text-align: center; padding: 60px 0; }
  .notfound__code { font-family: var(--mono); font-size: clamp(4.5rem, 16vw, 11rem); line-height: .9; letter-spacing: -.04em; color: transparent; -webkit-text-stroke: 1px var(--line-2); }
  .notfound h1 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 10px 0 12px; }
  .notfound p { max-width: 46ch; margin: 0 auto 26px; }
  .notfound__act { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
}

@layer components {
/* 专题行（图文交替） */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  padding: clamp(30px, 4vw, 54px) 0;
  border-top: 1px solid var(--line);
}
.feature--flip .feature__media { order: 2; }
.feature__media {
  border: 1px solid var(--line-2);
  background: var(--paper-hi);
  padding: 8px;
}
.feature__media img { width: 100%; }
.feature__no {
  display: inline-block;
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .18em;
  color: var(--cobalt);
  margin-bottom: 12px;
}
.feature h3 { font-size: clamp(1.3rem, 2.2vw, 1.75rem); margin-bottom: 12px; }
.feature p { font-size: .95rem; }
.feature__list { display: grid; gap: 8px; margin-top: 18px; }
.feature__list li { position: relative; padding-left: 18px; font-size: .88rem; color: var(--ink-2); }
.feature__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 7px;
  height: 1px;
  background: var(--teal);
}
.feature__kpi { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 22px; padding-top: 16px; border-top: 1px dashed var(--line-2); }
.feature__kpi div { font-size: .74rem; color: var(--ink-3); }
.feature__kpi b { display: block; font-family: var(--mono); font-size: 1.1rem; font-weight: 500; color: var(--ink); }
@media (max-width: 880px) {
  .feature { grid-template-columns: 1fr; }
  .feature--flip .feature__media { order: 0; }
}

/* 通用表格 */
.table { font-size: .86rem; background: var(--paper-hi); }
.table th, .table td { border: 1px solid var(--line); padding: 12px 14px; text-align: left; vertical-align: top; }
.table th { background: var(--paper-lo); font-weight: 600; color: var(--ink); white-space: nowrap; }
.table td { color: var(--ink-2); }
.table--compact th, .table--compact td { padding: 9px 12px; font-size: .82rem; }

/* 关键值网格 */
.kv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.kv > div { background: var(--paper-hi); padding: 22px; }
.kv small { display: block; font-family: var(--mono); font-size: .62rem; letter-spacing: .16em; color: var(--ink-4); margin-bottom: 8px; }
.kv b { display: block; font-size: 1.02rem; font-weight: 600; }
.kv p { font-size: .84rem; margin-top: 4px; }
@media (max-width: 820px) { .kv { grid-template-columns: 1fr; } }

/* 上一篇 / 下一篇 */
.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: clamp(36px, 5vw, 60px);
}
.pager a { background: var(--paper-hi); padding: 22px; transition: background .2s; }
.pager a:hover { background: #fff; }
.pager small { display: block; font-family: var(--mono); font-size: .62rem; letter-spacing: .16em; color: var(--ink-4); margin-bottom: 6px; }
.pager b { font-size: .95rem; font-weight: 500; }
.pager a:last-child { text-align: right; }
@media (max-width: 640px) { .pager { grid-template-columns: 1fr; } .pager a:last-child { text-align: left; } }

/* 作者/免责 */
.byline { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 18px; font-size: .78rem; color: var(--ink-4); }
.byline b { color: var(--ink-2); font-weight: 500; }

/* 分层架构图 */
.arch { display: grid; gap: 10px; counter-reset: arch; }
.arch__row {
  display: grid;
  grid-template-columns: 78px minmax(0, .72fr) minmax(0, 1.28fr);
  gap: clamp(14px, 2.4vw, 34px);
  align-items: center;
  border: 1px solid var(--line-2);
  background: var(--paper-hi);
  padding: 18px clamp(16px, 2.2vw, 26px);
  transition: background .25s var(--ease), color .25s var(--ease);
}
.arch__row:hover { background: var(--ink); color: var(--paper-hi); }
.arch__row:hover p { color: rgba(244, 241, 234, .7); }
.arch__row:hover .arch__no { color: #8fa2ff; }
.arch__row:hover .chips li { border-color: rgba(244, 241, 234, .25); color: rgba(244, 241, 234, .8); background: transparent; }
.arch__row--core { border-left: 3px solid var(--cobalt); }
.arch__no { font-family: var(--mono); font-size: .64rem; letter-spacing: .16em; color: var(--cobalt); }
.arch__row h3 { font-size: 1rem; }
.arch__row p { font-size: .8rem; margin-top: 4px; transition: color .25s; }
.arch__tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.arch__tags li { font-size: .7rem; border: 1px solid var(--line); border-radius: 100px; padding: 2px 9px; color: var(--ink-3); transition: .25s; }
@media (max-width: 820px) {
  .arch__row { grid-template-columns: 58px 1fr; row-gap: 10px; }
  .arch__tags { grid-column: 2; justify-content: flex-start; }
}

/* 内页小标题块 */
.block-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line-2); margin-bottom: 26px; }
.block-head h2 { font-size: clamp(1.35rem, 2.4vw, 1.9rem); }
.block-head p { font-size: .86rem; color: var(--ink-3); margin-left: auto; }
}

/* -------------------------------- 5. 动效 -------------------------------- */
@layer motion {
  @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
  @keyframes drift { from { transform: translateX(0); } to { transform: translateX(-50%); } }
  @keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

  html.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  html.js .reveal.in { opacity: 1; transform: none; }
  .reveal[data-d="1"] { transition-delay: .08s; }
  .reveal[data-d="2"] { transition-delay: .16s; }
  .reveal[data-d="3"] { transition-delay: .24s; }
  .reveal[data-d="4"] { transition-delay: .32s; }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    html.js .reveal { opacity: 1; transform: none; transition: none; }
    .ticker__track { animation: none; }
    .strip__dot { animation: none; }
    * { transition-duration: .01ms !important; }
  }
}

/* ------------------------------- 6. 工具类 ------------------------------- */
@layer utilities {
  .mono { font-family: var(--mono); }
  .eyebrow {
    font-family: var(--mono);
    font-size: .7rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--ink-4);
  }
  .muted { color: var(--ink-3); }
  .accent { color: var(--cobalt); }
  .mt-s { margin-top: 12px; }
  .mt-m { margin-top: 26px; }
  .mt-l { margin-top: 44px; }
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .two-col { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(20px, 3vw, 40px); }
  .three-col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .three-col > * { background: var(--paper-hi); padding: clamp(20px, 2.4vw, 28px); }
  @media (max-width: 900px) { .two-col, .three-col { grid-template-columns: 1fr; } }
}