/* =========================================================================
   玄息官网 v2 · 赛博修仙风（深浅双套）
   家族语言真源：tiangong/docs/20260815-玄息设计系统-DesignToken.md (v1.4)
   ========================================================================= */

/* ---------- 设计令牌（深浅双套） ---------- */
:root {
  --font-brand: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Source Han Serif CN', 'STZhongsong', 'SimSun', serif;
  --font-body: 'HarmonyOS Sans', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', system-ui, sans-serif;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --space-lg: 20px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-section: 88px;
  --maxw: 1200px;
  --header-h: 64px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

:root[data-theme="dark"] {
  --bg-deep: #1A2040;      /* LOGO 深色底 / Hero / 页脚 */
  --bg-base: #1A1C22;      /* 内容区底 */
  --bg-surface: #242630;   /* 卡片 */
  --gold: #C8A050;         /* 品牌金 */
  --gold-deep: #A87C2E;    /* 强调金 */
  --qi-blue: #4AA5C0;      /* 霓虹蓝（克制） */
  --purple: #C060D8;       /* 霓虹紫（克制） */
  --red: #E86858;          /* 警示 */
  --text: #E5E5E5;
  --text-strong: #F0EDE5;
  --muted: rgba(229, 229, 229, .62);
  --border: rgba(200, 160, 80, .18);
  --header-bg: rgba(20, 25, 46, .86);
  --shadow: 0 12px 32px rgba(0, 0, 0, .45);
  --card-shadow: 0 6px 24px rgba(0, 0, 0, .35);
  /* Hero 光晕（深色，保持现状） */
  --hero-blue-core: rgba(74, 165, 192, .20);
  --hero-blue-mid: rgba(74, 165, 192, .08);
  --hero-blue-ring: rgba(74, 165, 192, .20);
  --hero-gold-core: rgba(200, 160, 80, .30);
}

:root[data-theme="light"] {
  --bg-deep: #F5F0E0;      /* brand.moonlight */
  --bg-base: #F5F3EE;
  --bg-surface: #FFFFFF;
  --gold: #C8A050;
  --gold-deep: #8B7355;
  --qi-blue: #4A6C8A;
  --purple: #7A5AA0;
  --red: #C83030;
  --text: #1A1A1A;
  --text-strong: #1A1A1A;
  --muted: rgba(26, 26, 26, .62);
  --border: rgba(26, 26, 26, .12);
  --header-bg: rgba(245, 240, 224, .88);
  --shadow: 0 12px 32px rgba(26, 32, 64, .16);
  --card-shadow: 0 6px 20px rgba(26, 32, 64, .10);
  /* Hero 光晕（浅色，加深同系色 + 提高不透明度，增强对比） */
  --hero-blue-core: rgba(74, 108, 138, .36);
  --hero-blue-mid: rgba(74, 108, 138, .16);
  --hero-blue-ring: rgba(74, 108, 138, .34);
  --hero-gold-core: rgba(168, 124, 46, .52);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--gold); color: #1A1A1A; padding: 8px 16px; z-index: 9999; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 通用组件 ---------- */
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--bg-deep); }
.section-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--space-lg); }
.section-title {
  font-family: var(--font-brand);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700; letter-spacing: .04em;
  text-align: center; color: var(--text-strong);
  margin-bottom: 16px;
}
.section-lede {
  max-width: 760px; margin: 0 auto 40px; text-align: center;
  color: var(--muted); font-size: 1.05rem;
}
.section-lede strong { color: var(--gold); }

.cta-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 22px; border-radius: var(--radius-full);
  background: var(--gold); color: #1A1A1A; font-weight: 600;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
  box-shadow: 0 0 0 1px rgba(200, 160, 80, .4), 0 6px 18px rgba(200, 160, 80, .28);
  white-space: nowrap;
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px var(--gold), 0 10px 26px rgba(200, 160, 80, .4); }
.cta-lg { padding: 14px 32px; font-size: 1.05rem; }
.cta-ghost {
  background: transparent; color: var(--text-strong);
  box-shadow: 0 0 0 1px var(--border);
}
.cta-ghost:hover { box-shadow: 0 0 0 1px var(--gold); color: var(--gold); }

/* ---------- 1 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; height: var(--header-h);
  display: flex; align-items: center; gap: 16px; padding: 0 var(--space-lg);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 40px; height: 40px; border-radius: 8px; }
.brand-name { font-family: var(--font-brand); font-size: 1.25rem; font-weight: 700; color: var(--text-strong); letter-spacing: .06em; }
.main-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.main-nav a {
  padding: 8px 12px; border-radius: var(--radius-full); color: var(--text);
  font-size: .95rem; transition: color .2s, background .2s;
}
.main-nav a:hover { color: var(--gold); }
.main-nav a.active { color: var(--gold); background: rgba(200, 160, 80, .12); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 40px; height: 40px; border: 1px solid var(--border); border-radius: var(--radius-full);
  background: transparent; color: var(--text); display: inline-flex; align-items: center; justify-content: center;
  transition: color .2s, border-color .2s, background .2s;
}
.icon-btn:hover { color: var(--gold); border-color: var(--gold); }
.icon-btn svg { width: 20px; height: 20px; }
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: block; }
.burger { display: none; }

/* ---------- 2 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(120% 120% at 50% -10%, #2A3560 0%, var(--bg-deep) 55%);
  color: var(--text-strong);
  text-align: center;
  padding: 96px var(--space-lg) 88px;
}
:root[data-theme="light"] .hero {
  background: radial-gradient(120% 120% at 50% -10%, #FFF7E6 0%, var(--bg-deep) 60%);
}
/* 蓝色光晕区域（判定金色光晕是否跟随鼠标的边界） */
.hero-blue {
  position: absolute; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, var(--hero-blue-core) 0%, var(--hero-blue-mid) 52%, transparent 74%);
  box-shadow: 0 0 0 1px var(--hero-blue-ring);
  filter: blur(2px); pointer-events: none;
  left: 50%; top: 6%; transform: translateX(-50%);
}
/* 金色光晕（跟随鼠标，translate3d 由 JS 驱动） */
.hero-gold {
  position: absolute; width: 520px; height: 360px; border-radius: 50%;
  background: radial-gradient(50% 50% at 50% 50%, var(--hero-gold-core), transparent 72%);
  filter: blur(8px); pointer-events: none;
  left: 0; top: 0; will-change: transform;
  opacity: 0; transition: opacity .45s ease;
}
.hero-inner { position: relative; z-index: 1; }
.hero-logo {
  width: 200px; height: 200px; margin: 0 auto 20px; object-fit: contain;
  filter: drop-shadow(0 0 28px rgba(200, 160, 80, .5));
  animation: breathe 3.2s ease-in-out infinite;
}
.hero-title {
  font-family: var(--font-brand); font-size: clamp(3rem, 7vw, 4.6rem);
  font-weight: 700; letter-spacing: .12em; line-height: 1.1;
}
.hero-tagline {
  font-family: var(--font-brand); font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  color: var(--gold); letter-spacing: .08em; margin-top: 10px;
}
.hero-sub { color: var(--muted); font-size: 1.05rem; margin-top: 12px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; margin-top: 30px; flex-wrap: wrap; }
.hero-badge {
  display: inline-block; margin-top: 28px; padding: 6px 16px; border-radius: var(--radius-full);
  border: 1px solid var(--qi-blue); color: var(--qi-blue); font-size: .85rem; letter-spacing: .08em;
}

/* 品牌叙事四段式（生于鸿蒙 / 长于鸿蒙 / 成于鸿蒙 / 行于人间）
   合规约束：本区块须与 .hero-badge（HarmonyOS NEXT）保持视觉区隔，
   避免被连读为“华为官方授权或合作”语义。故独立分栏、独立分隔线、独立间距。 */
.hero-narrative {
  display: flex; justify-content: center; align-items: center; flex-wrap: wrap;
  gap: 0 18px; margin: 26px auto 0; padding-top: 22px;
  border-top: 1px solid var(--border); max-width: 640px;
}
.hero-narrative span {
  font-family: var(--font-brand); font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--gold); letter-spacing: .1em; line-height: 1.9; white-space: nowrap;
}
.hero-narrative span + span::before {
  content: "·"; color: var(--muted); margin-right: 18px; letter-spacing: 0;
}

@keyframes breathe { 0%, 100% { opacity: .78; } 50% { opacity: 1; } }

/* ---------- 3 产品定位 ---------- */
.systems-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.system-card {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 24px 18px; text-align: center; transition: transform .2s var(--ease), border-color .2s, box-shadow .2s;
}
.system-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.system-card svg { width: 34px; height: 34px; color: var(--gold); margin-bottom: 12px; }
.system-card h3 { font-family: var(--font-brand); font-size: 1.15rem; color: var(--text-strong); margin-bottom: 6px; }
.system-card p { font-size: .88rem; color: var(--muted); }

/* ---------- 4 功能亮点 ----------
   本区只讲「能用它做什么」（能力），不放界面截图——截图统一归第 5 区「玄息实录」展示，
   避免同一张界面在首页出现两次（2026-10-08 老板指出两区内容重复）。 */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 26px 20px 22px; text-align: center;
  transition: transform .2s var(--ease), border-color .2s, box-shadow .2s var(--ease);
}
.feature-card:hover { transform: translateY(-5px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.feature-icon { width: 34px; height: 34px; color: var(--gold); margin: 0 auto 14px; display: block; }
.feature-card h3 { font-family: var(--font-brand); font-size: 1.15rem; color: var(--text-strong); margin-bottom: 8px; }
.feature-card p { font-size: .9rem; color: var(--muted); line-height: 1.8; }

/* ---------- 5 玄息实录 ---------- */
.shots-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.shots-grid figure { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); background: var(--bg-surface); }
.shots-grid img { width: 100%; aspect-ratio: 9 / 16; object-fit: contain; }
.shots-grid figcaption { text-align: center; padding: 12px; color: var(--muted); font-size: .9rem; }

/* ---------- 6 下载引导 ---------- */
.download-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; align-items: center; }
.download-info { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; }
.app-icon { border-radius: var(--radius-lg); box-shadow: var(--card-shadow); }
.download-note { color: var(--muted); font-size: 1rem; max-width: 460px; }
.download-note strong { color: var(--gold); }
.download-qr {
  text-align: center; background: #fff; border-radius: var(--radius-lg);
  padding: 20px; border: 1px solid var(--border); box-shadow: var(--card-shadow);
}
.download-qr img { width: 200px; height: 200px; margin: 0 auto; object-fit: contain; }
.download-qr p { margin-top: 10px; color: #1A1A1A; font-size: .9rem; }

/* ---------- 7 关于 ---------- */
.about-card {
  max-width: 760px; margin: 0 auto; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px;
}
.about-card h3 { font-family: var(--font-brand); color: var(--text-strong); font-size: 1.3rem; margin-bottom: 12px; }
.about-card p { color: var(--muted); margin-bottom: 12px; }
.about-card strong { color: var(--gold); }
.about-links a { color: var(--gold); border-bottom: 1px solid transparent; }
.about-links a:hover { border-bottom-color: var(--gold); }

/* ---------- 8 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.contact-card {
  display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center;
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 30px 18px; transition: transform .2s var(--ease), border-color .2s, box-shadow .2s;
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.contact-card svg { width: 32px; height: 32px; color: var(--gold); }
.contact-card h3 { font-family: var(--font-brand); color: var(--text-strong); font-size: 1.05rem; }
.contact-card p { color: var(--muted); font-size: .9rem; word-break: break-all; }

/* ---------- 9 页脚 ---------- */
.site-footer { background: var(--bg-deep); border-top: 1px solid var(--border); padding: 44px var(--space-lg) 36px; text-align: center; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; }
.footer-links { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.footer-links a { color: var(--muted); font-size: .9rem; }
.footer-links a:hover { color: var(--gold); }
.footer-links span { color: var(--muted); }
.beian { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.beian a { color: var(--muted); font-size: .85rem; display: inline-flex; align-items: center; gap: 4px; }
.beian a:hover { color: var(--gold); }
.beian-icon { width: 16px; height: 16px; }
.copyright { color: var(--muted); font-size: .85rem; opacity: .8; }

/* ---------- 弹窗 ---------- */
.modal { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, .72); }
.modal-dialog {
  position: relative; background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px; text-align: center; max-width: 92vw; box-shadow: var(--shadow);
}
.modal-dialog img { width: min(320px, 70vw); height: auto; border-radius: 10px; margin: 0 auto; }
.modal-dialog p { margin-top: 12px; color: var(--text); }
.modal-close {
  position: absolute; top: -14px; right: -14px; width: 32px; height: 32px; border-radius: 50%;
  background: var(--gold); color: #1A1A1A; border: none; font-size: 20px; line-height: 1;
}

/* ---------- 滚动渐入 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 世界观页（v2/worldview/WorldView.html） ---------- */
.world-hero {
  padding: 120px var(--space-lg) 72px; text-align: center;
  background: radial-gradient(760px 420px at 50% 8%, rgba(200, 160, 80, .16), transparent 68%), var(--bg-deep);
  border-bottom: 1px solid var(--border);
}
:root[data-theme="light"] .world-hero {
  background: radial-gradient(760px 420px at 50% 8%, rgba(200, 160, 80, .20), transparent 68%), var(--bg-deep);
}
.world-kicker { color: var(--qi-blue); font-size: .88rem; letter-spacing: .16em; margin-bottom: 18px; }
.world-title {
  font-family: var(--font-brand); font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700; color: var(--text-strong); letter-spacing: .06em; line-height: 1.25;
}
.world-lead { font-size: clamp(1.05rem, 2vw, 1.35rem); color: var(--gold); margin-top: 18px; line-height: 1.7; }
.world-lead-sub { font-size: 1rem; color: var(--muted); margin-top: 8px; }
.world-motto {
  display: inline-block; margin-top: 28px; padding: 8px 22px; border-radius: var(--radius-full);
  border: 1px solid var(--border); color: var(--text); font-size: .92rem; letter-spacing: .1em;
}

.panel {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 22px 20px; transition: transform .2s var(--ease), border-color .2s, box-shadow .2s;
}
.panel h3 { font-family: var(--font-brand); font-size: 1.12rem; color: var(--text-strong); margin-bottom: 8px; }
.panel p { color: var(--muted); font-size: .94rem; line-height: 1.85; }
.panel p + p { margin-top: 10px; }
.panel-note { margin-top: 28px; background: transparent; border-style: dashed; }
.panel-note p { color: var(--text); }
.panel-note strong { color: var(--gold); }
.note-dim { color: var(--muted) !important; font-size: .88rem !important; }

.layer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.layer-grid .panel:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.layer-tag {
  display: inline-block; margin-bottom: 10px; padding: 3px 12px; border-radius: var(--radius-full);
  border: 1px solid var(--border); color: var(--gold); font-size: .8rem; letter-spacing: .1em;
}

.mech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: stretch; }
/* 四阶卡片等高：文字长短不一时仍保持整齐的一行四格 */
.mech-grid > .panel { display: flex; flex-direction: column; }
.mech-step {
  display: inline-block; margin-right: 8px; padding: 2px 10px; border-radius: var(--radius-full);
  background: rgba(200, 160, 80, .14); color: var(--gold); font-size: .82rem; letter-spacing: .08em;
}

.pivot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pivot-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }

.pillar-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.pillar-card { text-align: center; }
.pillar-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.pillar-word { color: var(--gold) !important; font-size: .82rem !important; letter-spacing: .18em; margin-bottom: 6px; }

.realm-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 18px; align-items: start; }
.realm-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.realm-count {
  font-family: var(--font-body); font-size: .78rem; color: var(--muted);
  border: 1px solid var(--border); border-radius: var(--radius-full); padding: 2px 9px; margin-left: 6px; vertical-align: middle;
}
.realm-line { color: var(--text) !important; font-size: .92rem !important; }
.realm-line span {
  display: inline-block; min-width: 40px; margin-right: 8px; color: var(--gold); font-size: .82rem; letter-spacing: .08em;
}
.realm-line strong { color: var(--gold); }

.people-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.people-card:first-child { grid-column: 1 / -1; }
.people-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--card-shadow); }
.people-role { color: var(--gold) !important; font-size: .86rem !important; letter-spacing: .04em; margin-bottom: 10px !important; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--bg-surface); }
.term-table { width: 100%; border-collapse: collapse; min-width: 520px; }
.term-table th, .term-table td { padding: 13px 16px; text-align: left; font-size: .92rem; border-bottom: 1px solid var(--border); }
.term-table th { color: var(--gold); font-weight: 600; font-size: .85rem; letter-spacing: .08em; background: rgba(200, 160, 80, .07); }
.term-table td { color: var(--muted); }
.term-table td:first-child { color: var(--text); }
.term-table td strong { color: var(--gold); }
.term-table tbody tr:last-child td { border-bottom: none; }
.glossary-note { margin-top: 16px; color: var(--muted); font-size: .9rem; text-align: center; }

.motto-block { text-align: center; padding: 12px 0 4px; }
.motto-line {
  font-family: var(--font-brand); font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  color: var(--gold); letter-spacing: .1em; line-height: 1.5;
}
.motto-sub { margin-top: 14px; color: var(--muted); font-size: .95rem; letter-spacing: .08em; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .systems-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .layer-grid, .mech-grid, .pivot-grid { grid-template-columns: repeat(2, 1fr); }
  .pillar-grid { grid-template-columns: repeat(3, 1fr); }
  .realm-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --space-section: 60px; --header-h: 60px; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--bg-deep); border-bottom: 1px solid var(--border);
    padding: 12px var(--space-lg) 20px; display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
  .burger { display: inline-flex; }
  .nav-actions .cta-btn { display: none; }
  .hero { padding: 64px var(--space-lg) 60px; }
  .hero-logo { width: 150px; height: 150px; }
  .systems-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .shots-grid { grid-template-columns: repeat(2, 1fr); }
  .systems-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .hero-title { letter-spacing: .08em; }
  /* 品牌叙事：窄屏改纵向单列，去掉中点分隔，避免挤行 */
  .hero-narrative { flex-direction: column; gap: 2px; padding-top: 18px; margin-top: 22px; }
  .hero-narrative span + span::before { content: none; }
  /* 世界观页：单列 */
  .world-hero { padding: 96px var(--space-lg) 56px; }
  .layer-grid, .mech-grid, .pivot-grid, .people-grid, .realm-grid { grid-template-columns: 1fr; }
  .people-card:first-child { grid-column: auto; }
  .pillar-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .term-table th, .term-table td { padding: 11px 12px; font-size: .88rem; }
}

/* ---------- 降级：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}