/* ============================================================
   PG游艺中心 · 共享样式表 /assets/site.css
   结构：1 重置 2 变量 3 基础排版 4 按钮 5 头部 6 抽屉导航
        7 页脚 8 通用组件 9 响应式 10 动效降级
   ============================================================ */

/* ---------- 1 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a { color: inherit; }

/* ---------- 2 变量 ---------- */
:root {
  /* 主色 */
  --zhu: #B4342A;
  --zhu-deep: #8C231C;
  --zhu-wash: rgba(180, 52, 42, 0.10);
  /* 第二主色 */
  --bamboo: #3C6E5B;
  --bamboo-mist: #DCE8E1;
  --bamboo-wash: rgba(60, 110, 91, 0.10);
  /* 点缀 */
  --gold: #C79A4B;
  --gold-sand: #F2E3C8;
  --gold-deep: #8A6520;
  /* 秩序色 */
  --slate: #5A6B7B;
  --slate-seat: #EDF1F4;
  /* 底与字 */
  --paper: #FAF6F1;
  --ink: #1F2429;
  --ink-soft: #3A424A;
  --glass: rgba(250, 246, 241, 0.72);
  --line: rgba(90, 107, 123, 0.22);
  --line-strong: rgba(90, 107, 123, 0.42);

  --focus: var(--zhu);
  --shadow-sm: 0 2px 12px -8px rgba(31, 36, 41, 0.55);
  --shadow-md: 0 26px 54px -34px rgba(31, 36, 41, 0.6);
  --radius-pill: 999px;
  --radius-card: 18px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --font-head: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --fs-xs: 12.5px;
  --fs-sm: 14px;
  --fs-base: 16.5px;
  --fs-md: 20px;
  --fs-lg: 25px;
  --fs-xl: 31px;
  --fs-2xl: 39px;
  --fs-3xl: 49px;
  --fs-4xl: 61px;

  --shell: 1180px;
}

/* ---------- 3 基础排版 ---------- */
html, body { min-height: 100%; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(112deg, rgba(60, 110, 91, 0.045) 0 1px, transparent 1px 46px),
    radial-gradient(120% 80% at 88% -10%, rgba(199, 154, 75, 0.13), transparent 62%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(30px, 5vw, var(--fs-3xl)); font-family: var(--font-serif); font-weight: 700; line-height: 1.12; }
h2 { font-size: clamp(23px, 3.2vw, var(--fs-lg)); }
h3 { font-size: var(--fs-md); }

p { margin: 0; }
p + p { margin-top: 0.85em; }

strong { font-weight: 800; }

::selection { background: var(--gold-sand); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 8px;
}

.h-display {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(33px, 5.2vw, var(--fs-4xl));
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.h-section {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(23px, 3.4vw, var(--fs-2xl));
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--bamboo);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
}

/* ---------- 4 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.18s var(--ease);
}

.btn-primary {
  background: var(--zhu);
  color: #fff;
  box-shadow: 0 12px 24px -18px var(--zhu-deep);
}

.btn-primary:hover { background: var(--zhu-deep); transform: translateY(-1px); }

.btn-ghost {
  background: var(--bamboo-wash);
  color: var(--bamboo);
  border-color: rgba(60, 110, 91, 0.3);
}

.btn-ghost:hover { background: var(--bamboo); color: #fff; }

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn-outline:hover { border-color: var(--zhu); color: var(--zhu); }

.btn:active { transform: translateY(0); }

/* ---------- 5 头部 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: var(--zhu);
  color: #fff;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 18px 30px -20px rgba(31, 36, 41, 0.9);
  transition: transform 0.22s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 12px clamp(10px, 2.4vw, 26px) 10px;
  background: linear-gradient(
    180deg,
    rgba(250, 246, 241, 0.97) 0%,
    rgba(250, 246, 241, 0.86) 68%,
    rgba(250, 246, 241, 0) 100%
  );
  transition: padding 0.24s var(--ease);
}

.site-header[data-scrolled="true"] { padding-top: 6px; padding-bottom: 6px; }

.header-inner {
  position: relative;
  z-index: 120;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 9px 12px 9px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(60, 110, 91, 0.22);
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15);
  box-shadow: 0 12px 32px -24px rgba(31, 36, 41, 0.7);
  transition: box-shadow 0.24s var(--ease), background-color 0.24s var(--ease);
}

.site-header[data-scrolled="true"] .header-inner {
  background: rgba(250, 246, 241, 0.9);
  box-shadow: 0 18px 38px -26px rgba(31, 36, 41, 0.75);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  text-decoration: none;
  color: var(--ink);
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 13px;
  background: linear-gradient(155deg, var(--zhu), var(--zhu-deep));
  color: #fff;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.06em;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.34),
    0 10px 20px -16px var(--zhu-deep);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 7px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(199, 154, 75, 0));
}

.brand-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.18; }

.brand-name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: inherit;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
  white-space: nowrap;
}

/* 导航（桌面横排） */
.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  margin-right: 4px;
}

.nav-list { display: flex; align-items: center; gap: 2px; }

.nav-list a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  color: var(--ink-soft);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-list a::before {
  content: attr(data-idx);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--slate);
  opacity: 0.72;
}

.nav-list a:hover { background: var(--bamboo-wash); color: var(--bamboo); }

.nav-list a[aria-current="page"] { background: var(--zhu-wash); color: var(--zhu); }

.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--zhu);
}

.nav-eyebrow { display: none; }
.nav-extra { display: none; }

.nav-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.nav-quick { display: grid; gap: 2px; margin-top: 10px; }

.nav-quick a {
  display: block;
  padding: 9px 2px;
  font-size: 14.5px;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.nav-quick a:hover { color: var(--zhu); padding-left: 6px; }

/* 头部动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  margin-left: 4px;
}

.header-cta { padding: 10px 18px; font-size: 14.5px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(60, 110, 91, 0.3);
  background: rgba(255, 255, 255, 0.55);
  color: var(--bamboo);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover { background: var(--bamboo-wash); }

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), top 0.22s var(--ease), bottom 0.22s var(--ease);
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 4px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  bottom: 4px;
  transform: rotate(-45deg);
}

.nav-toggle-label { display: inline-block; }

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
  background: linear-gradient(90deg, var(--zhu), var(--gold));
  pointer-events: none;
}

/* ---------- 6 抽屉导航（≤1023px） ---------- */
@media (max-width: 1023px) {
  .header-inner {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: rgba(250, 246, 241, 0.95);
    gap: 10px;
  }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 120;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: min(370px, 88vw);
    margin: 0;
    padding: 88px 22px 32px;
    overflow-y: auto;
    overscroll-behavior: contain;
    background-color: rgba(250, 246, 241, 0.97);
    background-image: repeating-linear-gradient(
      114deg,
      rgba(60, 110, 91, 0.06) 0 1px,
      transparent 1px 38px
    );
    border-left: 1px solid rgba(60, 110, 91, 0.24);
    box-shadow: -30px 0 70px -40px rgba(31, 36, 41, 0.75);
    transform: translateX(102%);
    transition: transform 0.24s var(--ease);
  }

  .site-nav[data-open="true"] { transform: translateX(0); }

  .site-header.is-nav-open::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(31, 36, 41, 0.44);
  }

  .nav-eyebrow {
    display: block;
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.16em;
    color: var(--bamboo);
  }

  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }

  .nav-list a {
    padding: 13px 12px;
    border-radius: 12px;
    border-bottom: 1px solid var(--line);
    font-size: 17px;
  }

  .nav-list a[aria-current="page"]::after { display: none; }

  .nav-extra { display: block; margin-top: 26px; }

  .nav-note { margin-bottom: 6px; font-size: 12px; }

  .header-actions { margin-left: auto; }
}

/* ---------- 7 页脚 ---------- */
.site-footer {
  --focus: var(--gold);
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(40px, 6vw, 72px) 0 26px;
  border-top: 3px solid var(--zhu);
  background-color: #1F2429;
  background-image:
    repeating-linear-gradient(116deg, rgba(250, 246, 241, 0.045) 0 1px, transparent 1px 44px),
    radial-gradient(120% 90% at 8% 0%, rgba(60, 110, 91, 0.42), transparent 62%);
  color: rgba(250, 246, 241, 0.78);
  font-size: 15px;
}

.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr);
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(26px, 4vw, 40px);
  border-bottom: 1px solid rgba(250, 246, 241, 0.14);
}

.footer-identity { min-width: 0; }

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--paper);
}

.footer-mark { width: 42px; height: 42px; }

.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-tag { color: rgba(250, 246, 241, 0.6); }

.footer-lede {
  margin-top: 16px;
  max-width: 40ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(250, 246, 241, 0.72);
}

.footer-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.footer-chip {
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(199, 154, 75, 0.42);
  background: rgba(199, 154, 75, 0.12);
  color: var(--gold-sand);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 32px);
}

.footer-col { min-width: 0; }

.footer-col-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.footer-col ul { display: grid; gap: 8px; counter-reset: fcount; }

.footer-col li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  align-items: baseline;
  gap: 6px;
  counter-increment: fcount;
}

.footer-col li::before {
  content: counter(fcount, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: rgba(250, 246, 241, 0.38);
}

.footer-col a {
  color: rgba(250, 246, 241, 0.8);
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-col a:hover { color: #fff; border-bottom-color: var(--gold); }

.footer-contact {
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(20px, 3vw, 26px);
  border-radius: var(--radius-card);
  border: 1px solid rgba(250, 246, 241, 0.12);
  background: rgba(250, 246, 241, 0.06);
}

.footer-contact .footer-col-title { margin-bottom: 10px; }

.contact-list { display: grid; gap: 10px; }

.contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.contact-key {
  min-width: 44px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.contact-val {
  font-size: 14.5px;
  color: rgba(250, 246, 241, 0.92);
}

.contact-mail {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  color: #fff;
  word-break: break-all;
}

.copy-btn {
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(199, 154, 75, 0.5);
  color: var(--gold-sand);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.copy-btn:hover { background: rgba(199, 154, 75, 0.18); }

.copy-btn[data-copied="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: #1F2429;
}

.contact-note {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(250, 246, 241, 0.6);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 34px);
  padding-top: 22px;
  border-top: 1px solid rgba(250, 246, 241, 0.14);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: rgba(250, 246, 241, 0.55);
}

.footer-legal { color: rgba(250, 246, 241, 0.62); }

.footer-copy { margin-right: auto; }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(250, 246, 241, 0.25);
  color: rgba(250, 246, 241, 0.86);
  font-family: var(--font-mono);
  font-size: 12.5px;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.to-top:hover { background: rgba(250, 246, 241, 0.12); color: #fff; }

/* ---------- 8 通用组件 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.section { padding-block: clamp(40px, 6vw, 84px); }

.section + .section { border-top: 1px solid var(--line); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.breadcrumb li { display: flex; align-items: center; gap: 8px; }

.breadcrumb li::after { content: "/"; color: rgba(90, 107, 123, 0.45); }
.breadcrumb li:last-child::after { content: ""; }

.breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumb a:hover { color: var(--zhu); border-bottom-color: var(--zhu); }

.breadcrumb [aria-current="page"] { color: var(--ink); font-weight: 700; }

.grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.col-span-8 { grid-column: span 8; }
.col-span-5 { grid-column: span 5; }
.col-span-3 { grid-column: span 3; }

.card {
  padding: clamp(18px, 2.4vw, 28px);
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.card--glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-color: rgba(60, 110, 91, 0.24);
  box-shadow: var(--shadow-md);
}

.card--wash {
  background: var(--bamboo-mist);
  border-color: rgba(60, 110, 91, 0.18);
  box-shadow: none;
}

.note {
  padding: 14px 18px;
  border-left: 3px solid var(--gold);
  border-radius: 0 12px 12px 0;
  background: var(--gold-sand);
  color: var(--ink);
  font-size: 15px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bamboo-mist);
  color: var(--bamboo);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.tag--gold { background: var(--gold-sand); color: var(--gold-deep); }

.rule-card {
  display: grid;
  gap: 12px;
  padding: 22px 22px 20px;
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.rule-no {
  justify-self: start;
  padding: 3px 9px;
  border-radius: 8px;
  background: var(--zhu);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
}

.rule-title { font-size: var(--fs-md); font-weight: 800; line-height: 1.35; }

.rule-rows { display: grid; gap: 8px; }

.rule-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.rule-key {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.rule-val { font-size: 15px; color: var(--ink-soft); }

.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--slate-seat), var(--bamboo-mist));
}

.media img { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media-caption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.index-rail {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.index-rail a {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--slate);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.index-rail a:hover { color: var(--zhu); }
.index-rail a[aria-current="true"] { color: var(--zhu); font-weight: 700; }

/* 滚动显现 */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease);
}

.js [data-reveal][data-revealed="true"] { opacity: 1; transform: none; }

/* ---------- 9 响应式 ---------- */
@media (max-width: 1100px) {
  .nav-list a { padding: 9px 10px; font-size: 14.5px; }
  .header-cta { padding: 9px 15px; font-size: 14px; }
}

@media (max-width: 899px) {
  .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .col-span-8, .col-span-5, .col-span-3 { grid-column: span 4; }

  .footer-top { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }

  .index-rail { position: static; border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 10px; }
}

@media (max-width: 639px) {
  :root { --fs-base: 16px; }
  .header-cta { display: none; }
  .brand-tag { display: none; }
  .header-inner { padding: 8px 8px 8px 10px; gap: 8px; }
  .brand-mark { width: 36px; height: 36px; border-radius: 11px; font-size: 13px; }
  .brand-name { font-size: 15.5px; }
  .nav-toggle { padding: 8px 12px; }
  .rule-row { grid-template-columns: 76px minmax(0, 1fr); }
}

@media (max-width: 519px) {
  .footer-links { grid-template-columns: 1fr; }
  .footer-meta { font-size: 12px; }
  .to-top { margin-left: 0; }
}

/* ---------- 10 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js [data-reveal] { opacity: 1 !important; transform: none !important; }

  .site-nav { transition: none; }
  .btn:hover, .btn-primary:hover { transform: none; }
}