/* 不挂科课表 官网 · 校园贴纸风设计系统
   token 与组件规范见 docs/superpowers/specs/2026-09-23-buguake-website-design.md §3 */
:root {
  --paper: #fff8ec;
  --paper-2: #fdf1de;
  --ink: #2d2a45;
  --brand: #333464;
  --hl: #ffd666;
  --dim: #6b6685;
  --faint: #8a849f;
  --card: #ffffff;
  --line-soft: #c9bfae;
  --red: #c0392b;

  --c-blue-bg: #eef0ff;   --c-blue-fg: #7c8df0;
  --c-orange-bg: #fff0e6; --c-orange-fg: #e8894a;
  --c-green-bg: #e9f8f1;  --c-green-fg: #3ba57a;
  --c-purple-bg: #f6e9ff; --c-purple-fg: #9a5ec9;
  --c-yellow-bg: #fff9d9; --c-yellow-fg: #c9a227;

  --border-w: 2.5px;
  --shadow: 4px 4px 0 var(--ink);
  --shadow-lg: 6px 6px 0 var(--ink);
  --radius: 16px;
  --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.75 var(--font);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
strong { font-weight: 800; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 34px; }
.section { padding: 46px 0 10px; }

/* ---------- 文字角色 ---------- */
.eyebrow {
  font-size: 12px; font-weight: 800; letter-spacing: .2em;
  color: #b09a6e; margin: 0 0 8px;
}
.h2 { font-size: 30px; font-weight: 900; line-height: 1.3; margin: 0 0 24px; }
.h2 .mark { background: var(--hl); padding: 0 6px; border-radius: 4px; }
.sub { color: var(--dim); font-size: 14px; margin: 6px 0 0; }
.dim { color: var(--dim); }
.faint { color: var(--faint); font-size: 12px; }
.hl-pen {
  background: linear-gradient(transparent 58%, var(--hl) 58%);
  padding: 0 4px;
}

/* ---------- 贴纸组件 ---------- */
.sticker {
  background: var(--card);
  border: var(--border-w) solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.sticker-lg { box-shadow: var(--shadow-lg); }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 800;
  background: var(--hl); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 99px;
  padding: 4px 12px;
  box-shadow: 2px 2px 0 var(--ink);
  transform: rotate(-1.5deg);
  white-space: nowrap;
}
.badge-red { background: #ffe1e1; color: var(--red); font-size: 10px; padding: 2px 9px; box-shadow: none; border-width: 1.5px; transform: none; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-weight: 900; cursor: pointer; user-select: none;
  border: var(--border-w) solid var(--ink); border-radius: 14px;
  padding: 13px 24px; font-size: 14px; line-height: 1;
  box-shadow: var(--shadow); background: var(--card); color: var(--ink);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 6px 6px 0 var(--ink); }
.btn:active { transform: translateY(1px) scale(.97); box-shadow: 2px 2px 0 var(--ink); }
.btn-primary { background: var(--brand); color: #fff; font-size: 15px; padding: 15px 28px; }
.btn-nav {
  padding: 8px 16px; font-size: 12px; border-width: 2px;
  background: var(--brand); color: var(--hl); border-radius: 99px;
  box-shadow: 2.5px 2.5px 0 var(--ink);
}
.btn-sm { padding: 11px 20px; font-size: 13px; border-width: 2px; border-radius: 12px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 248, 236, .94);
  backdrop-filter: blur(6px);
  border-bottom: 2px dashed #e5d5b8;
}
.nav-inner {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 0;
}
.logo { display: flex; align-items: center; gap: 9px; font-weight: 900; font-size: 16px; }
.logo img {
  width: 30px; height: 30px; border-radius: 9px;
  border: 2px solid var(--ink); box-shadow: 2px 2px 0 var(--ink);
}
.nav-links { margin-left: auto; display: flex; gap: 20px; font-size: 13px; font-weight: 700; }
.nav-links a { position: relative; padding: 2px 0; }
.nav-links a:hover { color: var(--brand); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 7px;
  background: var(--hl); z-index: -1; transition: right .25s ease;
}
.nav-links a:hover::after { right: 0; }
.nav-cta { margin-left: 4px; }
.nav-burger { display: none; }

/* ---------- Hero ---------- */
.hero { display: flex; gap: 40px; align-items: center; padding: 56px 0 48px; }
.hero-copy { flex: 1; min-width: 0; }
.hero-title {
  font-size: clamp(34px, 4.2vw, 46px); font-weight: 900;
  line-height: 1.22; letter-spacing: -.01em; margin: 18px 0 14px;
}
.hero-desc { font-size: 15px; color: #5b5675; line-height: 1.8; margin: 0 0 26px; max-width: 460px; }
.hero-cta { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.hero-note { font-size: 12px; color: var(--faint); }
.hero-chips { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; font-size: 12px; color: var(--dim); }
.chip {
  background: var(--card); border: 1.5px dashed var(--line-soft);
  padding: 5px 12px; border-radius: 8px;
}

/* Hero 右侧组合 */
.hero-art { flex: 1; position: relative; display: flex; justify-content: center; min-width: 0; }
.phone {
  width: 310px; max-width: 100%;
  background: var(--card);
  border: 3.5px solid var(--ink); border-radius: 32px;
  box-shadow: 10px 10px 0 var(--ink);
  padding: 18px 16px 16px; transform: rotate(2deg);
  position: relative; z-index: 2;
}
.phone-status { display: flex; justify-content: space-between; font-size: 10px; font-weight: 800; color: var(--faint); margin-bottom: 4px; }
.phone-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; }
.phone-week { font-size: 17px; font-weight: 900; }
.phone-date { font-size: 10px; color: var(--faint); }
.phone-tools { margin-left: auto; font-size: 10px; color: var(--c-blue-fg); font-weight: 800; }
.phone-grid { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.pg-row { display: grid; grid-template-columns: 30px repeat(5, 1fr); gap: 3px; }
.pg-head { font-size: 8.5px; text-align: center; color: var(--faint); font-weight: 800; margin-bottom: 6px; }
.pg-head b { color: var(--red); }
.pg-axis { font-size: 7.5px; color: var(--faint); text-align: center; padding-top: 6px; }
.pg-cell {
  border: 1.5px solid var(--ink); border-radius: 7px;
  padding: 5px 4px; font-size: 8.5px; font-weight: 800; position: relative;
  overflow: hidden;
}
.pg-cell small { display: block; font-weight: 700; }
.pg-empty { border: 1.5px dashed #e0d8c8; background: transparent; }
.pg-blue { background: var(--c-blue-bg); }   .pg-blue small { color: var(--c-blue-fg); }
.pg-orange { background: var(--c-orange-bg); } .pg-orange small { color: var(--c-orange-fg); }
.pg-green { background: var(--c-green-bg); } .pg-green small { color: var(--c-green-fg); }
.pg-purple { background: var(--c-purple-bg); } .pg-purple small { color: var(--c-purple-fg); }
.pg-yellow { background: var(--c-yellow-bg); } .pg-yellow small { color: var(--c-yellow-fg); }
.pg-cont-top { border-bottom: none; border-radius: 7px 7px 0 0; }
.pg-cont-bot { border-top: none; border-radius: 0 0 7px 7px; color: var(--c-purple-fg); }
.pg-now { position: absolute; left: 0; right: 0; top: 50%; height: 2px; background: #e05252; }
.phone-tabs {
  margin-top: 12px; background: #f4f2ec; border: 2px solid var(--ink);
  border-radius: 99px; display: flex; justify-content: space-around;
  padding: 7px 6px; font-size: 9.5px; font-weight: 800; color: var(--faint);
}
.phone-tabs .on { background: var(--brand); color: var(--hl); padding: 4px 12px; border-radius: 99px; }

.float-card { position: absolute; z-index: 3; }
.float-widget {
  top: 0; right: -8px; width: 176px;
  background: var(--card); border: 3px solid var(--ink); border-radius: 16px;
  box-shadow: 5px 5px 0 var(--ink); padding: 12px 14px; transform: rotate(-3deg);
}
.float-widget .fw-label { font-size: 10px; font-weight: 900; color: var(--faint); display: flex; gap: 5px; align-items: center; margin-bottom: 7px; }
.float-widget .fw-day { font-size: 11px; font-weight: 800; margin-bottom: 3px; }
.fw-course {
  border: 1.5px solid var(--ink); border-radius: 8px;
  padding: 5px 7px; font-size: 10px; font-weight: 800; margin-bottom: 4px;
}
.fw-more { margin-top: 6px; font-size: 9px; color: var(--c-blue-fg); font-weight: 800; }

.float-door {
  bottom: 4px; left: -14px; width: 190px;
  background: var(--brand); color: #fff;
  border: 3px solid var(--ink); border-radius: 16px;
  box-shadow: 5px 5px 0 var(--ink); padding: 12px 16px; transform: rotate(-2.5deg);
}
.float-door .fd-label { font-size: 10px; font-weight: 900; opacity: .75; margin-bottom: 5px; }
.fd-row { display: flex; align-items: center; gap: 9px; }
.fd-icon {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--hl); border: 2px solid var(--ink);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.fd-title { font-size: 13px; font-weight: 900; }
.fd-sub { font-size: 9px; opacity: .7; }

/* ---------- 三大特色 ---------- */
.hl-grid { display: flex; gap: 16px; }
.hl-card { flex: 1; padding: 22px; }
.hl-card .icon { font-size: 28px; margin-bottom: 10px; }
.hl-card h3 { font-size: 19px; font-weight: 900; margin: 0 0 8px; }
.hl-card p { margin: 0; font-size: 13px; line-height: 1.8; color: var(--dim); }
.hl-card.main { background: var(--brand); color: #fff; }
.hl-card.main p { color: rgba(255, 255, 255, .85); }

/* ---------- 功能网格 ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feat { padding: 16px 14px; border-width: 2.5px; box-shadow: var(--shadow); }
.feat .icon { font-size: 22px; margin-bottom: 7px; }
.feat h3 { font-size: 14px; font-weight: 900; margin: 0 0 5px; }
.feat p { margin: 0; font-size: 11.5px; line-height: 1.7; color: var(--dim); }

/* ---------- 隐私横幅 ---------- */
.privacy-band {
  margin-top: 42px; background: var(--brand); color: #fff;
  border: 3px solid var(--ink); border-radius: 18px;
  box-shadow: var(--shadow-lg); padding: 22px 28px;
  display: flex; gap: 26px; align-items: center;
}
.privacy-band .icon { font-size: 30px; }
.privacy-band .pb-body { flex: 1; }
.privacy-band h3 { font-size: 18px; font-weight: 900; margin: 0 0 4px; }
.privacy-band p { margin: 0; font-size: 13px; opacity: .85; line-height: 1.7; }
.privacy-band .btn {
  background: var(--hl); color: var(--brand); white-space: nowrap;
  border-width: 2px; border-radius: 12px; padding: 10px 18px; font-size: 13px;
}

/* ---------- 下载 ---------- */
.dl-card { padding: 24px; display: flex; gap: 24px; align-items: center; }
.dl-main { flex: 1; }
.dl-title { font-size: 15px; font-weight: 900; margin: 0 0 8px; }
.dl-desc { font-size: 13px; color: var(--dim); line-height: 1.8; margin: 0 0 14px; }
.dl-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.dl-notes {
  width: 210px; flex-shrink: 0;
  background: var(--paper-2); border: 1.5px dashed var(--line-soft);
  border-radius: 12px; padding: 14px; font-size: 12px; color: var(--dim); line-height: 1.9;
}
.dl-notes b { color: var(--ink); }
.ver-badge { background: var(--hl); padding: 0 6px; border-radius: 4px; }

/* ---------- 双栏（更新日志 / FAQ 预览） ---------- */
.duo { display: flex; gap: 18px; }
.duo > * { flex: 1; min-width: 0; }
.panel { padding: 22px; border-width: 2.5px; box-shadow: var(--shadow); }
.panel-head { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.panel-head .icon { font-size: 18px; }
.panel-head h3 { font-size: 18px; font-weight: 900; margin: 0; }
.panel-head .meta { margin-left: auto; font-size: 11px; color: var(--faint); }
.log-list { border-left: 3px solid var(--hl); padding-left: 14px; display: flex; flex-direction: column; gap: 14px; }
.log-item .ver { font-size: 14px; font-weight: 900; }
.log-item .date { font-size: 11px; color: var(--faint); font-weight: 400; margin-left: 6px; }
.log-item .desc { font-size: 12px; color: var(--dim); margin-top: 2px; }
.more-link { display: inline-block; margin-top: 16px; font-size: 13px; font-weight: 800; color: var(--brand); }
.more-link:hover { text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 3px; text-underline-offset: 3px; }

.faq-mini { display: flex; flex-direction: column; gap: 10px; }
.faq-mini .q {
  background: var(--paper-2); border: 1.5px dashed var(--line-soft);
  border-radius: 10px; padding: 10px 12px; font-size: 13px; font-weight: 800;
}

/* ---------- 参与贡献 ---------- */
.contribute { padding: 26px; }
.contribute-inner { display: flex; gap: 26px; align-items: center; }
.contribute-copy { flex: 1.4; }
.contribute-copy h2 { font-size: 24px; font-weight: 900; margin: 0 0 8px; }
.contribute-copy p { font-size: 13px; color: var(--dim); line-height: 1.8; margin: 0 0 14px; }
.contribute-steps { flex: 1; display: flex; flex-direction: column; gap: 8px; font-size: 12px; }
.step {
  background: var(--paper-2); border: 1.5px dashed var(--line-soft);
  border-radius: 10px; padding: 9px 12px; color: var(--dim);
}
.step b { color: var(--ink); }

/* ---------- 免责 / 致谢 ---------- */
.disclaimer {
  font-size: 12px; color: var(--faint);
  background: var(--card); border: 1.5px dashed var(--line-soft);
  border-radius: 10px; padding: 12px 16px; line-height: 1.8;
}
.disclaimer b { color: var(--ink); }

.credits-card { padding: 26px; text-align: center; }
.credits-card h2 { font-size: 24px; font-weight: 900; margin: 0 0 8px; }
.credits-card p { font-size: 13px; color: var(--dim); line-height: 1.8; max-width: 680px; margin: 0 auto 16px; }
.credit-chips { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; font-size: 12px; font-weight: 800; }
.credit-chips a, .credit-chips span {
  background: var(--c-blue-bg); border: 2px solid var(--ink);
  border-radius: 99px; padding: 6px 14px;
}
.credit-chips a:hover { background: var(--hl); }
.credits-actions { margin-top: 18px; display: flex; gap: 12px; justify-content: center; }
.credits-actions .btn-primary { color: var(--hl); }

/* ---------- 页脚 ---------- */
.footer { margin-top: 46px; background: var(--ink); color: #cfc9e3; padding: 30px 0 26px; font-size: 13px; }
.footer-grid { display: flex; gap: 30px; margin-bottom: 18px; }
.footer-brand { flex: 1; }
.footer-brand .name { font-weight: 900; color: #fff; display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.footer-brand .name img { width: 22px; height: 22px; border-radius: 7px; border: 1.5px solid var(--hl); }
.footer-brand p { opacity: .75; line-height: 1.8; margin: 0; }
.footer-col b { display: block; color: #fff; font-weight: 800; margin-bottom: 8px; }
.footer-col a { display: block; opacity: .75; margin-bottom: 6px; }
.footer-col a:hover { opacity: 1; color: var(--hl); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .15); padding-top: 14px;
  display: flex; justify-content: space-between; gap: 12px; font-size: 11px; opacity: .6; flex-wrap: wrap;
}

/* ---------- 子页通用 ---------- */
.page-head { padding: 56px 0 8px; }
.page-head h1 { font-size: clamp(30px, 4vw, 40px); font-weight: 900; margin: 14px 0 8px; line-height: 1.25; }
.page-head p { color: var(--dim); margin: 0; max-width: 640px; }
.back-link { font-size: 13px; font-weight: 800; color: var(--brand); }
.back-link:hover { text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 3px; }

/* FAQ 手风琴 */
.faq-list { display: flex; flex-direction: column; gap: 12px; padding-bottom: 20px; }
details.faq {
  background: var(--card); border: 2.5px solid var(--ink); border-radius: 14px;
  box-shadow: var(--shadow); overflow: hidden;
}
details.faq summary {
  cursor: pointer; list-style: none; user-select: none;
  padding: 15px 18px; font-weight: 800; font-size: 14.5px;
  display: flex; align-items: center; gap: 10px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+"; margin-left: auto; font-size: 18px; font-weight: 900;
  color: var(--brand); transition: transform .2s ease;
}
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq .a {
  padding: 0 18px 16px; color: var(--dim); font-size: 14px; line-height: 1.85;
}
details.faq .a a { color: var(--brand); font-weight: 700; text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 3px; text-underline-offset: 2px; }
details.faq .q-idx {
  width: 26px; height: 26px; flex-shrink: 0; border-radius: 8px;
  background: var(--hl); border: 2px solid var(--ink);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 900;
}

/* 更新日志时间线 */
.timeline { position: relative; padding: 8px 0 30px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 0; bottom: 0;
  width: 4px; background: var(--hl); border-radius: 2px;
  transform-origin: top;
}
.tl-item { position: relative; padding: 0 0 26px 34px; }
.tl-item::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--card); border: 3.5px solid var(--ink);
}
.tl-item .tl-ver { font-size: 17px; font-weight: 900; }
.tl-item .tl-date { font-size: 12px; color: var(--faint); margin-left: 8px; }
.tl-item .tl-src {
  font-size: 10px; font-weight: 800; color: var(--dim);
  background: var(--paper-2); border: 1px dashed var(--line-soft);
  border-radius: 99px; padding: 1px 8px; margin-left: 8px; vertical-align: 2px;
}
.tl-item ul { margin: 8px 0 0; padding-left: 20px; }
.tl-item li { font-size: 13.5px; color: var(--dim); line-height: 1.8; margin-bottom: 4px; }
.tl-item a.tl-link { font-size: 12px; font-weight: 800; color: var(--brand); }
.tl-loading { color: var(--faint); font-size: 14px; padding: 20px 0 40px; }

/* 隐私页 */
.pp { padding-bottom: 30px; max-width: 860px; }
.pp h2 { font-size: 20px; font-weight: 900; color: var(--brand); margin: 34px 0 10px; }
.pp h3 { font-size: 15.5px; font-weight: 800; margin: 20px 0 6px; }
.pp p, .pp li { font-size: 14.5px; color: var(--dim); line-height: 1.9; }
.pp ul, .pp ol { padding-left: 22px; }
.pp strong { color: var(--ink); }
.pp table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 12px 0; }
.pp th, .pp td { border: 2px solid var(--ink); padding: 9px 12px; text-align: left; vertical-align: top; }
.pp th { background: var(--hl); font-weight: 900; }
.pp td { background: var(--card); color: var(--dim); }
.pp .pp-note {
  background: var(--paper-2); border: 1.5px dashed var(--line-soft);
  border-radius: 10px; padding: 12px 16px; font-size: 13px; color: var(--dim);
}
.pp .changelog-pp { list-style: none; padding-left: 0; }
.pp .changelog-pp li { border-left: 3px solid var(--hl); padding-left: 12px; margin-bottom: 8px; }

/* ---------- 动画挂载（JS 开启后隐藏，避免无 JS 白屏） ---------- */
.js-anim .anim { opacity: 0; }

/* 卡片悬停（reveal 动画完成后 JS 会清掉 inline transform，交还给这里） */
.hl-card, .feat, .panel, .dl-card, .contribute, .credits-card {
  transition: box-shadow .18s ease, transform .18s ease;
}
.hl-card:hover, .feat:hover, .panel:hover,
.dl-card:hover, .contribute:hover, .credits-card:hover {
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 var(--ink);
}
details.faq { transition: box-shadow .18s ease; }
details.faq:hover { box-shadow: 6px 6px 0 var(--ink); }

/* 更新日志时间线黄线 draw-in（无 JS 时保持完整显示） */
.js-anim .timeline::before { transform: scaleY(0); }
.js-anim .timeline.drawn::before { transform: scaleY(1); transition: transform .7s ease; }

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .hero { flex-direction: column; align-items: stretch; gap: 56px; padding-top: 40px; }
  .hero-desc { max-width: none; }
  .hero-art { margin-top: 8px; }
  .phone { transform: rotate(0); }
  .float-widget { right: max(0px, calc(50% - 210px)); }
  .float-door { left: max(0px, calc(50% - 210px)); }
  .hl-grid { flex-direction: column; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .duo { flex-direction: column; }
  .dl-card { flex-direction: column; align-items: stretch; }
  .dl-notes { width: auto; }
  .contribute-inner { flex-direction: column; align-items: stretch; }
  .privacy-band { flex-direction: column; align-items: flex-start; gap: 14px; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 18px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--paper); border-bottom: 2px dashed #e5d5b8;
    padding: 12px 18px 16px; margin: 0;
  }
  .nav-burger {
    display: inline-flex; margin-left: auto; font-size: 13px; font-weight: 800;
    background: var(--card); border: 2px solid var(--ink); border-radius: 99px;
    padding: 6px 14px; cursor: pointer; box-shadow: 2px 2px 0 var(--ink);
  }
  .nav-cta, .nav-inner .badge-red { display: none; }
  .hero { gap: 40px; padding-top: 36px; }
  .hero-title { font-size: 30px; }
  .h2 { font-size: 24px; margin-bottom: 18px; }
  .feat-grid { grid-template-columns: 1fr; gap: 16px; }
  .btn, .btn-primary { width: 100%; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-note { text-align: center; }

  /* 手机端 Hero 右侧：悬浮卡脱离绝对定位、改为手机下方顺序排列，杜绝三块叠压 */
  .hero-art { flex-direction: column; align-items: center; gap: 16px; margin-top: 0; }
  .phone { width: min(300px, 100%); transform: rotate(0); }
  .float-card {
    position: static; transform: none !important;
    width: min(300px, 100%); box-shadow: 4px 4px 0 var(--ink);
  }
  .float-widget { right: auto; top: auto; }
  .float-door { left: auto; bottom: auto; }

  /* 区块呼吸感 */
  .section { padding: 38px 0 8px; }
  .hl-grid { gap: 16px; }
  .duo { gap: 16px; }
  .privacy-band { margin-top: 34px; padding: 18px 18px; }
  .dl-card, .contribute, .credits-card, .panel { padding: 18px 16px; }

  /* 隐私页表格收紧，防止挤爆 */
  .pp table { font-size: 12px; }
  .pp th, .pp td { padding: 6px 8px; }
  .pp h2 { margin-top: 26px; }

  /* 移动端：阴影减半、旋转归零 */
  .sticker, .feat, .panel { box-shadow: 3px 3px 0 var(--ink); }
  .phone { box-shadow: 6px 6px 0 var(--ink); border-width: 3px; }
  .badge { transform: rotate(0); }
  .footer-grid { flex-wrap: wrap; }
  .footer-col { min-width: 120px; }
}

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