/* ============================================================
   易游指南 / site.css  —  共享外壳：reset、变量、刊头、导航、页脚
   ============================================================ */

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

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body { margin: 0; }

h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }

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

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

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

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩 */
  --teal-900: #0E3B45;
  --teal-800: #12505C;
  --teal-700: #17616F;
  --silver-100: #E8EDF0;
  --silver-050: #F6F9FA;
  --indigo: #16243A;
  --indigo-deep: #101A2B;
  --wine: #5A1F33;
  --wine-deep: #3E1524;
  --orange: #FF6A2B;
  --cyan: #4FF0D2;
  --gold: #E9B44C;
  --ink: #22303A;
  --ink-soft: #4A5B66;
  --white: #FFFFFF;

  /* 字号阶梯 1.25 */
  --fs-12: 12px;
  --fs-15: 15px;
  --fs-18: 18px;
  --fs-24: 24px;
  --fs-32: 32px;
  --fs-44: 44px;
  --fs-64: 64px;

  /* 形状 */
  --r-lg: 28px;
  --r-md: 20px;
  --r-sm: 14px;
  --r-pill: 999px;

  /* 框架 */
  --w-max: 1240px;
  --gutter: clamp(20px, 4vw, 48px);

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(120% 80% at 12% -12%, rgba(79, 240, 210, 0.10), transparent 60%),
    radial-gradient(90% 60% at 102% 0%, rgba(255, 106, 43, 0.07), transparent 55%),
    var(--silver-100);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.85;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(38px, 5.6vw, var(--fs-64)); font-weight: 900; }
h2 { font-size: clamp(26px, 3.4vw, var(--fs-44)); }
h3 { font-size: clamp(20px, 2.2vw, var(--fs-32)); }
h4 { font-size: var(--fs-24); }

p { line-height: 1.85; }

strong { font-weight: 700; }

::selection {
  background: rgba(79, 240, 210, 0.55);
  color: #06262B;
}

/* ---------- 4. 通用工具 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--teal-700);
}

.section {
  padding-block: clamp(48px, 7vw, 96px);
}

.section + .section {
  border-top: 1px solid rgba(14, 59, 69, 0.14);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(14, 59, 69, 0.28), transparent);
  margin-block: clamp(32px, 4vw, 56px);
}

/* 面包屑 */
.breadcrumbs {
  padding-block: 18px;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.breadcrumbs__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumbs__link {
  color: var(--teal-800);
  border-bottom: 1px solid rgba(14, 59, 69, 0.3);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumbs__link:hover { color: var(--orange); border-color: var(--orange); }

.breadcrumbs__sep { color: rgba(34, 48, 58, 0.4); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  white-space: nowrap;
  transition:
    transform 0.2s var(--ease),
    background-color 0.2s var(--ease),
    color 0.2s var(--ease),
    border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--accent {
  background: var(--orange);
  color: #2A0E02;
  box-shadow: 0 12px 26px -16px rgba(255, 106, 43, 0.95);
}

.btn--accent:hover { background: #FF7E45; }

.btn--cyan { background: var(--cyan); color: #052A2A; }

.btn--cyan:hover { background: #74F6DF; }

.btn--ghost {
  background: rgba(79, 240, 210, 0.08);
  border-color: rgba(79, 240, 210, 0.45);
  color: var(--cyan);
}

.btn--ghost:hover {
  background: rgba(79, 240, 210, 0.18);
  border-color: var(--cyan);
}

.btn--light { background: var(--white); color: var(--teal-900); }

.btn--light:hover { background: var(--silver-050); }

.btn--sm { padding: 10px 16px; font-size: 13px; }

/* 焦点 */
:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 6px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--cyan);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(14, 59, 69, 0.2);
  background: rgba(255, 255, 255, 0.6);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--teal-800);
}

/* 堆叠画板 */
.panel {
  position: relative;
  padding: clamp(24px, 3.4vw, 44px);
  border: 1px solid rgba(14, 59, 69, 0.1);
  border-radius: var(--r-lg);
  background: var(--silver-050);
  box-shadow: 0 22px 60px -46px rgba(14, 59, 69, 0.75);
}

.panel--teal {
  background: linear-gradient(158deg, #0E3B45, #0B2E37 72%);
  border-color: rgba(79, 240, 210, 0.24);
  color: var(--silver-050);
}

.panel--indigo {
  background: linear-gradient(158deg, #16243A, #101A2B 72%);
  border-color: rgba(79, 240, 210, 0.2);
  color: var(--silver-050);
}

.panel--wine {
  background: linear-gradient(158deg, #5A1F33, #3E1524 72%);
  border-color: rgba(233, 180, 76, 0.3);
  color: #FDECEF;
}

.panel--silver {
  background: linear-gradient(170deg, #FFFFFF, #F6F9FA 70%);
  border-color: rgba(14, 59, 69, 0.12);
}

.panel--teal .panel__lead,
.panel--indigo .panel__lead,
.panel--wine .panel__lead { opacity: 0.86; }

.panel__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.panel__title {
  font-size: clamp(22px, 2.6vw, var(--fs-32));
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.panel__lead {
  margin-top: 12px;
  max-width: 58ch;
  font-size: var(--fs-15);
  line-height: 1.9;
  color: inherit;
}

.panel--silver .panel__lead { color: var(--ink-soft); }

/* 栅格 */
.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--5-3 { grid-template-columns: 5fr 3fr; }

/* 卡片 */
.card {
  padding: clamp(18px, 2vw, 26px);
  border: 1px solid rgba(14, 59, 69, 0.14);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.72);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.card:hover {
  border-color: rgba(79, 240, 210, 0.85);
  transform: translateY(-4px);
  box-shadow: 0 20px 44px -34px rgba(14, 59, 69, 0.8);
}

.card__title {
  font-size: var(--fs-18);
  font-weight: 800;
  line-height: 1.5;
}

.card__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

/* 正文阅读区 */
.prose { max-width: 68ch; }

.prose > * + * { margin-top: 1.2em; }

.prose h2 {
  font-size: clamp(24px, 2.6vw, var(--fs-32));
  margin-top: 1.8em;
}

.prose h3 { font-size: var(--fs-24); margin-top: 1.6em; }

.prose ul, .prose ol { padding-left: 1.2em; }

.prose ul li { list-style: none; position: relative; padding-left: 16px; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 1px;
  background: var(--teal-700);
}

.prose ol { list-style: decimal; }

.prose ol li::marker { font-family: var(--font-mono); color: var(--teal-700); }

.prose a { color: var(--teal-800); border-bottom: 1px solid rgba(14, 59, 69, 0.35); }

.prose a:hover { color: var(--orange); border-color: var(--orange); }

.prose blockquote {
  padding: 18px 22px;
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(14, 59, 69, 0.05);
  color: var(--ink-soft);
}

/* 图片容器（页面阶段放平板特写 / 检索截图 / 对照示意） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(79, 240, 210, 0.28);
  border-radius: var(--r-md);
  background:
    radial-gradient(80% 60% at 20% 0%, rgba(79, 240, 210, 0.18), transparent 62%),
    linear-gradient(158deg, rgba(14, 59, 69, 0.94), rgba(22, 36, 58, 0.94));
}

.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--tablet { aspect-ratio: 4 / 3; border-radius: var(--r-lg); }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: rgba(232, 237, 240, 0.9);
  background: linear-gradient(180deg, transparent, rgba(6, 32, 38, 0.88));
}

/* ---------- 5. 头部 / 刊头 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 200;
  transform: translate(-50%, -160%);
  padding: 10px 22px;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  background: var(--cyan);
  color: #062A31;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.2s var(--ease);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
  color: var(--silver-050);
  background: linear-gradient(180deg, #0E3B45, #0B2F38 64%, #0A2A32);
  border-bottom: 1px solid rgba(79, 240, 210, 0.22);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60% 150% at 16% 0%, rgba(79, 240, 210, 0.16), transparent 62%),
    radial-gradient(52% 130% at 88% -20%, rgba(255, 106, 43, 0.16), transparent 60%);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(79, 240, 210, 0.14);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: transform 0.1s linear;
}

.masthead__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 22px var(--gutter) 18px;
}

.masthead__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  justify-self: start;
  padding: 4px;
  border-radius: var(--r-sm);
}

.masthead__glyph {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: linear-gradient(150deg, rgba(79, 240, 210, 0.95), rgba(79, 240, 210, 0.18) 58%, rgba(255, 106, 43, 0.8));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.masthead__glyph::after {
  content: "";
  position: absolute;
  inset: 9px 10px;
  border: 2px solid #062A31;
  border-radius: 4px;
  opacity: 0.82;
}

.masthead__brandtext { display: block; }

.masthead__name {
  display: block;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1.25;
  color: var(--white);
}

.masthead__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: rgba(79, 240, 210, 0.88);
  text-transform: uppercase;
}

.masthead__tagline {
  justify-self: center;
  padding: 8px 22px;
  border: 1px solid rgba(79, 240, 210, 0.22);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.04);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-align: center;
  color: rgba(232, 237, 240, 0.8);
}

.masthead__aside { justify-self: end; }

.issue-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid rgba(233, 180, 76, 0.5);
  border-radius: var(--r-pill);
  background: rgba(233, 180, 76, 0.1);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(243, 223, 174, 0.92);
}

.issue-pill__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(79, 240, 210, 0.18);
}

.issue-pill__num {
  font-size: 14px;
  color: var(--gold);
}

/* 导航条 */
.nav-bar { position: relative; }

.nav-bar::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79, 240, 210, 0.45), transparent);
}

.nav-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: var(--w-max);
  min-height: 56px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.nav-collapse {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.site-nav { width: 100%; }

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(4px, 1.6vw, 26px);
}

.site-nav__item { position: relative; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 16px 10px;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: rgba(232, 237, 240, 0.8);
  transition: color 0.22s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--white); }

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: var(--cyan); }

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--cyan);
}

/* 悬停快捷入口 */
.nav-peek {
  position: absolute;
  top: calc(100% - 2px);
  left: 50%;
  z-index: 5;
  width: 250px;
  padding: 16px 16px 18px;
  border: 1px solid rgba(79, 240, 210, 0.28);
  border-radius: 18px;
  background: linear-gradient(180deg, #16243A, #101A2B);
  box-shadow: 0 26px 60px -30px rgba(0, 0, 0, 0.9);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 8px);
  transition: opacity 0.2s var(--ease), transform 0.24s var(--ease), visibility 0.2s var(--ease);
}

.site-nav__item--peek:hover .nav-peek,
.site-nav__item--peek:focus-within .nav-peek {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.nav-peek__head {
  margin-bottom: 10px;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(79, 240, 210, 0.9);
}

.nav-peek__list { display: grid; gap: 2px; }

.nav-peek__link {
  display: block;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  color: rgba(232, 237, 240, 0.86);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-peek__link:hover,
.nav-peek__link:focus-visible {
  background: rgba(79, 240, 210, 0.1);
  border-left-color: var(--cyan);
  color: var(--white);
}

.nav-actions {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 2px;
  color: var(--silver-050);
}

.nav-toggle__bars { display: grid; gap: 5px; width: 22px; }

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[data-open="true"] .nav-toggle__bars span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[data-open="true"] .nav-toggle__bars span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.nav-toggle__text {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(64px, 9vw, 120px);
  border-top: 1px solid rgba(79, 240, 210, 0.18);
  background: linear-gradient(180deg, #16243A, #101A2B 58%, #0B1320);
  color: rgba(232, 237, 240, 0.86);
}

.footer__layer { position: relative; }

.footer__layer + .footer__layer {
  border-top: 1px solid rgba(232, 237, 240, 0.1);
}

.footer__inner {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: clamp(30px, 4.4vw, 56px) var(--gutter);
}

/* 第一层：编号索引 */
.footer-index__eyebrow {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: rgba(79, 240, 210, 0.85);
}

.footer-index__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4px clamp(18px, 3vw, 40px);
}

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

.footer-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 12px 12px 0;
  border-bottom: 1px solid rgba(232, 237, 240, 0.1);
  transition: border-color 0.2s var(--ease);
}

.footer-index__link:hover { border-bottom-color: rgba(79, 240, 210, 0.6); }

.footer-index__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.footer-index__label {
  font-size: 16px;
  font-weight: 600;
  color: rgba(232, 237, 240, 0.86);
  transition: color 0.2s var(--ease);
}

.footer-index__link:hover .footer-index__label { color: var(--white); }

/* 第二层：酒红公告抽屉 */
.footer__layer--drawer {
  background: linear-gradient(180deg, rgba(90, 31, 51, 0.58), rgba(90, 31, 51, 0.22));
  border-block: 1px solid rgba(233, 180, 76, 0.24);
}

.footer__layer--drawer .footer__inner {
  padding-block: clamp(14px, 2vw, 22px);
}

.drawer { display: block; }

.drawer__toggle {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 8px 0;
  text-align: left;
  color: rgba(255, 255, 255, 0.9);
}

.drawer__badge {
  flex: 0 0 auto;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: var(--gold);
  color: #2A0E02;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.drawer__summary {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.82);
}

.drawer__chev {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.26s var(--ease);
}

.drawer[data-open="true"] .drawer__chev {
  transform: rotate(-135deg) translateY(-2px);
}

.drawer__panel { padding: 6px 0 20px; }

.drawer__panel[hidden] { display: none; }

.drawer__list {
  display: grid;
  gap: 10px;
  max-width: 78ch;
  margin-bottom: 16px;
}

.drawer__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.drawer__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 7px;
  height: 1px;
  background: var(--gold);
}

.drawer__link {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(79, 240, 210, 0.5);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* 第三层：联系与品牌 */
.footer-contact {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
  gap: clamp(24px, 4vw, 64px);
}

.footer-brand__name {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--white);
}

.footer-brand__desc {
  max-width: 36ch;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(232, 237, 240, 0.7);
}

.footer-contact__list { display: grid; gap: 14px; }

.footer-contact__item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(79, 240, 210, 0.8);
}

.footer-contact__value {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  overflow-wrap: anywhere;
}

.footer-contact__value--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

/* 第四层：条款与版权 */
.footer__layer--legal { background: rgba(0, 0, 0, 0.24); }

.footer__layer--legal .footer__inner {
  padding-block: clamp(18px, 2.4vw, 26px);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  font-size: 13px;
  color: rgba(232, 237, 240, 0.62);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.footer-legal__link {
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  color: rgba(232, 237, 240, 0.8);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-legal__link:hover {
  color: var(--cyan);
  border-bottom-color: rgba(79, 240, 210, 0.6);
}

.footer-legal__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(232, 237, 240, 0.55);
}

.footer-legal__copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(232, 237, 240, 0.5);
}

/* ---------- 7. 滚动显现 ---------- */
[data-reveal] {
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1080px) {
  .masthead__tagline { display: none; }
  .masthead__inner { grid-template-columns: minmax(0, 1fr) auto; }
}

@media (max-width: 900px) {
  .masthead__inner {
    padding: 16px var(--gutter) 14px;
    gap: 12px;
  }

  .masthead__name { font-size: 18px; }
  .masthead__glyph { width: 30px; height: 30px; border-radius: 9px; }
  .masthead__glyph::after { inset: 8px 9px; }

  .nav-bar__inner {
    flex-wrap: wrap;
    justify-content: space-between;
    min-height: 0;
    padding-block: 8px;
  }

  .nav-toggle { display: inline-flex; margin-left: auto; order: 1; }

  .nav-collapse {
    order: 2;
    display: block;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.36s var(--ease);
  }

  .site-header[data-open="true"] .nav-collapse {
    max-height: min(76vh, 660px);
    overflow-y: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 6px;
  }

  .site-nav__item { width: 100%; }

  .site-nav__link {
    display: block;
    padding: 14px 6px;
    font-size: 16px;
    border-bottom: 1px solid rgba(232, 237, 240, 0.12);
  }

  .site-nav__link::after {
    left: 6px;
    right: auto;
    bottom: 8px;
    width: 26px;
  }

  .site-nav__link[aria-current="page"] { color: var(--cyan); }

  .nav-peek { display: none; }

  .nav-actions {
    position: static;
    transform: none;
    padding: 16px 0 20px;
    display: flex;
  }

  .nav-actions .btn { width: 100%; }

  .grid--7-5,
  .grid--8-4,
  .grid--5-3 { grid-template-columns: 1fr; }

  .footer-index__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-contact { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .issue-pill { padding: 6px 11px; font-size: 11px; }
  .issue-pill__num { font-size: 13px; }

  .drawer__toggle { flex-wrap: wrap; gap: 10px 12px; }
  .drawer__summary { flex: 1 1 100%; order: 3; font-size: 13px; }
  .drawer__chev { margin-left: auto; }

  .footer-index__list { grid-template-columns: 1fr; }

  .footer-contact__item { grid-template-columns: 1fr; gap: 2px; }

  .footer-legal { flex-direction: column; align-items: flex-start; }

  .breadcrumbs__list { font-size: 11px; }
}

/* ---------- 9. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

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

  .card:hover,
  .btn:hover { transform: none; }

  .scroll-progress__bar { transition: none; }
}