/* ==========================================================================
   酷游中心 · 共享外壳与基础组件  /assets/site.css
   设计逻辑：悬浮胶囊导航 + 手账纸张叠层 + 仪表盘等宽标注
   ========================================================================== */

/* 01 — 设计变量 ---------------------------------------------------------- */
:root {
  --sea-900: #0B2E4F;
  --sea-700: #123F63;
  --sea-500: #1E5F8A;
  --coral: #F26A4B;
  --sunset: #FFB38A;
  --mist: #DCE3E8;
  --sand: #F4E8D6;
  --ink: #12202B;
  --ink-soft: #3B5065;
  --salt: #F9FBFC;
  --jade: #2F8F83;
  --amber: #D99A2B;

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

  --wrap: 1200px;
  --read: 720px;
  --radius-pill: 999px;
  --radius-card: 18px;
  --border-print: 1.5px solid var(--mist);
  --shadow-pill: 0 8px 26px rgba(11, 46, 79, 0.12);
  --shadow-card: 0 14px 34px rgba(11, 46, 79, 0.10);
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* 02 — 重置与中文排版基准 ------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--salt);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.005em;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--sea-900);
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 6.2rem);
  font-weight: 900;
  line-height: 1.04;
}

h2 { font-size: clamp(1.7rem, 3.5vw, 3rem); }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.5rem); line-height: 1.3; }

p { margin: 0; }

a { color: var(--sea-500); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--coral); }

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

ul, ol { margin: 0; padding-left: 1.25em; }
ul[class], ol[class] { list-style: none; padding-left: 0; }

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

table { border-collapse: collapse; width: 100%; }

::selection { background: var(--coral); color: var(--sea-900); }

/* 03 — 焦点反馈 ---------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
  box-shadow: inset 0 0 0 2px var(--salt);
}

/* 04 — 跳转链 ------------------------------------------------------------ */
.skip-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: var(--sea-900);
  color: var(--salt);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  box-shadow: var(--shadow-pill);
  transform: translateY(-180%);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translateY(0); color: var(--salt); }

#main-content { display: block; scroll-margin-top: 112px; }

/* 05 — 浮动胶囊头部 ------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 14px clamp(12px, 3vw, 28px) 0;
  transition: padding .25s var(--ease);
}

.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 70;
  height: 3px;
  background: rgba(220, 227, 232, 0.55);
  pointer-events: none;
}
.scroll-meter-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--sea-500), var(--coral));
}

.header-rail {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 10px;
  border: 1px solid rgba(220, 227, 232, 0.9);
  border-radius: var(--radius-pill);
  background: rgba(249, 251, 252, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-pill);
  transition: padding .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}

.brand-capsule {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  background: var(--sea-900);
  color: var(--salt);
  text-decoration: none;
  transition: transform .2s var(--ease), background .2s var(--ease);
}
.brand-capsule:hover,
.brand-capsule:focus-visible { background: var(--sea-700); color: var(--salt); transform: translateY(-1px); }

.brand-mark {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.brand-tag {
  padding-left: 10px;
  border-left: 1px solid rgba(249, 251, 252, 0.28);
  color: var(--sunset);
  font-size: 12px;
  line-height: 1.25;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: opacity .2s var(--ease), max-width .2s var(--ease), padding .2s var(--ease);
  max-width: 240px;
  overflow: hidden;
}

.nav-capsule {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-item { position: relative; }

.nav-link {
  display: inline-block;
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  color: var(--sea-700);
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}
.nav-link:hover { background: var(--sand); color: var(--sea-900); }
.nav-link[aria-current="page"] {
  background: var(--sea-900);
  color: var(--salt);
  font-weight: 700;
  box-shadow: inset 0 0 0 1.5px rgba(242, 106, 75, 0.95);
}
.nav-link[aria-current="page"]:hover { background: var(--sea-700); color: var(--salt); }

@media (hover: hover) and (min-width: 961px) {
  .nav-link::after {
    content: attr(data-summary);
    position: absolute;
    top: calc(100% + 11px);
    left: 50%;
    z-index: 6;
    padding: 7px 11px;
    border-radius: 10px;
    background: var(--sea-900);
    color: var(--sand);
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.04em;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -4px);
    box-shadow: 0 12px 26px rgba(11, 46, 79, 0.28);
    transition: opacity .18s var(--ease), transform .18s var(--ease);
  }
  .nav-link:hover::after,
  .nav-link:focus-visible::after { opacity: 1; transform: translate(-50%, 0); }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  margin-left: auto;
}

.cta-capsule {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: var(--radius-pill);
  background: var(--coral);
  color: var(--sea-900);
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 5px 0 rgba(11, 46, 79, 0.14);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
}
.cta-capsule:hover,
.cta-capsule:focus-visible {
  background: var(--sunset);
  color: var(--sea-900);
  transform: translateY(-2px);
  box-shadow: 0 7px 0 rgba(11, 46, 79, 0.16);
}
.cta-capsule::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 0.95em;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-pill);
  background: var(--salt);
  color: var(--sea-900);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { background: var(--sand); border-color: var(--sunset); }

.nav-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--sea-900);
}
.nav-bars::before,
.nav-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--coral);
  transition: transform .2s var(--ease);
}
.nav-bars::before { top: -5px; }
.nav-bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle-text { white-space: nowrap; }

/* 头部滚动收紧状态 */
.site-header[data-stuck="true"] { padding-top: 7px; }
.site-header[data-stuck="true"] .header-rail {
  padding: 5px 8px;
  background: rgba(249, 251, 252, 0.97);
  box-shadow: 0 12px 30px rgba(11, 46, 79, 0.18);
}
.site-header[data-stuck="true"] .brand-tag {
  max-width: 0;
  padding-left: 0;
  border-left-color: transparent;
  opacity: 0;
}

/* 06 — 纸张叠层页脚 ------------------------------------------------------ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  padding: clamp(40px, 6vw, 76px) clamp(16px, 4vw, 32px) 0;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(30, 95, 138, 0.55) 0%, rgba(11, 46, 79, 0) 58%),
    var(--sea-900);
  color: var(--salt);
}

.footer-paper {
  position: absolute;
  top: -16px;
  left: 50%;
  width: min(1120px, 88%);
  height: 32px;
  border-radius: 12px 12px 0 0;
  background: var(--sand);
  transform: translateX(-50%) rotate(-0.5deg);
  pointer-events: none;
  box-shadow: inset 0 -1px 0 rgba(11, 46, 79, 0.08);
}
.footer-paper::after {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: -5px;
  height: 5px;
  border-radius: 0 0 6px 6px;
  background: var(--coral);
  opacity: 0.9;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.35fr 1fr 0.95fr;
  gap: clamp(24px, 4vw, 56px);
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-bottom: clamp(26px, 4vw, 46px);
}

.footer-brand { display: grid; align-content: start; }

.footer-kicker {
  margin: 0;
  color: var(--sunset);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
}

.footer-slogan {
  margin-top: 12px;
  max-width: 22ch;
  color: var(--salt);
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 800;
  line-height: 1.42;
  letter-spacing: 0.01em;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.footer-nav { display: grid; align-content: start; }

.footer-heading {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  color: var(--sunset);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1.6;
}
.footer-heading::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--coral);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-block;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  color: rgba(249, 251, 252, 0.82);
  font-size: 14.5px;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--sunset);
  border-bottom-color: var(--coral);
  transform: translateX(3px);
}

.footer-contact { display: grid; align-content: start; }

.contact-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
}

.contact-key {
  color: rgba(249, 251, 252, 0.55);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.contact-value {
  color: var(--salt);
  font-size: 14px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.copy-btn {
  padding: 3px 10px;
  border: 1px solid rgba(249, 251, 252, 0.3);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--sunset);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.copy-btn:hover { background: var(--coral); border-color: var(--coral); color: var(--sea-900); }
.copy-btn[data-state="copied"] { background: var(--jade); border-color: var(--jade); color: var(--salt); }
.copy-btn[data-state="failed"] { background: var(--amber); border-color: var(--amber); color: var(--ink); }

.footer-note {
  margin-top: 16px;
  max-width: 40ch;
  color: rgba(249, 251, 252, 0.6);
  font-size: 12.5px;
  line-height: 1.7;
}

.copy-live {
  min-height: 1.2em;
  margin-top: 10px;
  color: var(--sunset);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}

.footer-legal {
  padding: 18px 0 26px;
  border-top: 1px solid rgba(249, 251, 252, 0.16);
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-legal-links .footer-link { font-size: 13px; color: rgba(249, 251, 252, 0.72); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  color: rgba(249, 251, 252, 0.5);
  font-size: 12px;
  letter-spacing: 0.03em;
}

/* 07 — 布局容器 ---------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.section { padding-block: clamp(44px, 6.5vw, 92px); }
.section--tint { background: var(--mist); }
.section--sand { background: linear-gradient(180deg, var(--sand) 0%, #EFE0CB 100%); }
.section--deep { background: var(--sea-900); color: var(--salt); }
.section--deep h2,
.section--deep h3 { color: var(--salt); }

.prose { max-width: var(--read); }
.prose > * + * { margin-top: 1.05em; }
.prose h2 { margin-top: 1.8em; font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
.prose h3 { margin-top: 1.5em; }
.prose ul,
.prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.4em; }
.prose strong { color: var(--sea-900); font-weight: 700; }

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* 08 — 文字层级组件 ------------------------------------------------------ */
.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--sea-500);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--coral);
}

.lede {
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
  line-height: 1.72;
}

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

/* 09 — 按钮 -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1.5px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease),
              border-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease);
}

.btn--coral {
  background: var(--coral);
  color: var(--sea-900);
  box-shadow: 0 5px 0 rgba(255, 255, 255, 0.14);
}
.btn--coral:hover,
.btn--coral:focus-visible {
  background: var(--sunset);
  color: var(--sea-900);
  transform: translateY(-2px);
  box-shadow: 0 7px 0 rgba(255, 255, 255, 0.16);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(249, 251, 252, 0.42);
  color: var(--salt);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--sunset);
  color: var(--sunset);
  transform: translateY(-2px);
}

.btn--sea { background: var(--sea-900); color: var(--salt); }
.btn--sea:hover,
.btn--sea:focus-visible { background: var(--sea-500); color: var(--salt); transform: translateY(-2px); }

.btn--quiet { background: var(--mist); color: var(--sea-900); }
.btn--quiet:hover,
.btn--quiet:focus-visible { background: var(--sand); color: var(--sea-900); transform: translateY(-2px); }

/* 10 — 纸张卡片 ---------------------------------------------------------- */
.paper-card {
  position: relative;
  display: block;
  padding: clamp(18px, 2.4vw, 28px);
  border: var(--border-print);
  border-radius: var(--radius-card);
  background: var(--salt);
  box-shadow: 6px 6px 0 rgba(220, 227, 232, 0.6);
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.paper-card:hover,
.paper-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--coral);
  box-shadow: 8px 8px 0 rgba(244, 232, 214, 0.95);
}

.paper-card--sand { background: var(--sand); }
.paper-card--deep {
  background: var(--sea-900);
  border-color: rgba(249, 251, 252, 0.18);
  color: var(--salt);
  box-shadow: 6px 6px 0 rgba(30, 95, 138, 0.5);
}
.paper-card--deep h2,
.paper-card--deep h3 { color: var(--salt); }
.paper-card--deep a { color: var(--sunset); }

/* 11 — 标签 -------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(11, 46, 79, 0.12);
  border-radius: var(--radius-pill);
  background: var(--sand);
  color: var(--sea-900);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-decoration: none;
}
.tag--coral { background: var(--coral); border-color: transparent; color: var(--sea-900); }
.tag--jade { background: rgba(47, 143, 131, 0.14); border-color: rgba(47, 143, 131, 0.35); color: #1F6B62; }
.tag--amber { background: rgba(217, 154, 43, 0.16); border-color: rgba(217, 154, 43, 0.4); color: #7A5410; }

/* 12 — 图片容器基础（页面阶段放置占位或本地图） -------------------------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: var(--border-print);
  border-radius: var(--radius-card);
  background: var(--sand);
}

.figure__img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.figure--wide .figure__img { aspect-ratio: 16 / 9; }
.figure--tall .figure__img { aspect-ratio: 4 / 5; }
.figure--screen .figure__img {
  max-width: 340px;
  margin-inline: auto;
  aspect-ratio: 9 / 16;
  border-radius: 20px;
}

.figure__cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: rgba(11, 46, 79, 0.88);
  color: var(--salt);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.figure__placeholder {
  display: grid;
  place-items: center;
  min-height: 180px;
  aspect-ratio: 16 / 9;
  background: repeating-linear-gradient(135deg,
    rgba(220, 227, 232, 0.8) 0 10px,
    rgba(244, 232, 214, 0.8) 10px 20px);
  color: #6A7F91;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* 13 — 面包屑 ------------------------------------------------------------ */
.breadcrumbs {
  margin: clamp(16px, 3vw, 28px) 0;
  color: #5A6E80;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.breadcrumbs ol,
.breadcrumbs ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumbs li { display: flex; align-items: center; gap: 10px; }
.breadcrumbs li + li::before { content: "/"; color: #9AAEBE; }
.breadcrumbs a {
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  color: var(--sea-500);
  text-decoration: none;
}
.breadcrumbs a:hover,
.breadcrumbs a:focus-visible { color: var(--sea-900); border-bottom-color: var(--coral); }

/* 14 — 渐显（由 JS 添加 html.has-reveal 后启用） ------------------------- */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.has-reveal [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* 15 — 响应式 ------------------------------------------------------------ */
@media (max-width: 1120px) {
  .brand-tag { max-width: 190px; font-size: 11.5px; }
  .nav-link { padding: 9px 10px; font-size: 14px; }
}

@media (max-width: 960px) {
  .site-header { padding-top: 10px; }
  .header-rail { padding: 7px 8px; gap: 8px; }
  .brand-tag { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav-capsule {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    max-height: min(70vh, 520px);
    padding: 10px;
    overflow: auto;
    border: 1px solid var(--mist);
    border-radius: 22px;
    background: var(--salt);
    box-shadow: 0 18px 40px rgba(11, 46, 79, 0.2);
  }
  .nav-capsule[data-open="true"] { display: block; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-link {
    display: block;
    padding: 13px 16px;
    border-radius: 14px;
    font-size: 15.5px;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { border-radius: 14px; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-slogan { max-width: 30ch; }

  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: span 6; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .header-rail { border-radius: 22px; }
  .brand-capsule { padding: 9px 13px; }
  .brand-mark { font-size: 0.96rem; }
  .cta-capsule { padding: 10px 13px; font-size: 13px; }
  .cta-capsule::after { display: none; }
  .nav-toggle { padding: 9px 12px; font-size: 12.5px; }

  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-paper { width: 94%; height: 24px; top: -12px; }
  .footer-legal-inner { justify-content: flex-start; }

  .contact-row { grid-template-columns: minmax(0, 1fr) auto; }
  .contact-key { grid-column: 1 / -1; }

  .grid--12 { grid-template-columns: 1fr; }
  .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: 1 / -1; }
}

@media (max-width: 420px) {
  .nav-toggle-text { display: none; }
  .nav-toggle { padding: 10px; }
}

/* 16 — 尊重减弱动效 ------------------------------------------------------ */
@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;
  }
  .has-reveal [data-reveal] { opacity: 1; transform: none; }
  .paper-card:hover,
  .paper-card:focus-within,
  .footer-link:hover,
  .brand-capsule:hover,
  .cta-capsule:hover,
  .btn:hover { transform: none; }
}