/* ==========================================================================
   6319登录 — 共享外壳样式 /assets/site.css
   母题：高原等高线 · 轻挂标识 · 侧边品牌轨道 · 玻璃转实色
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, pre { margin: 0; }

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

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

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

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

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

/* ---------- 2. Tokens ---------- */
:root {
  --lake: #0F6E8C;
  --lake-deep: #0A4B60;
  --mist: #D8E9EF;
  --sand: #E07A3F;
  --sand-deep: #A8491C;
  --sand-mist: #F7E7D8;
  --snow: #FCFDFD;
  --ink: #12332E;
  --slate: #55696E;
  --ok: #2E8B6B;
  --warn: #C97A18;
  --glass: rgba(232, 241, 244, 0.62);

  --line: rgba(15, 110, 140, 0.16);
  --line-strong: rgba(15, 110, 140, 0.32);

  --shadow-soft: 0 18px 46px -30px rgba(10, 75, 96, 0.55);
  --shadow-lift: 0 28px 62px -34px rgba(10, 75, 96, 0.55);

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

  --rail-w: 96px;
  --header-h: 76px;

  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 28px;

  --ease: cubic-bezier(0.22, 0.68, 0.36, 1);
}

@media (min-width: 1024px) and (max-width: 1199px) {
  :root { --rail-w: 84px; }
}

@media (max-width: 1023px) {
  :root { --header-h: 64px; }
}

/* ---------- 3. Base / 中文排版 ---------- */
html { font-family: var(--font-sans); }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  color: var(--ink);
  background-color: var(--snow);
  padding-left: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

main { display: block; padding-top: var(--header-h); }

h1, h2, h3, h4 {
  line-height: 1.24;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--lake-deep);
  text-wrap: balance;
}

p { text-wrap: pretty; }

strong, b { font-weight: 700; color: var(--ink); }

::selection {
  background: rgba(224, 122, 63, 0.28);
  color: var(--lake-deep);
}

/* ---------- 4. 无障碍基础 ---------- */
:focus-visible {
  outline: 2px solid var(--sand);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 999;
  padding: 0.62rem 1.4rem;
  border-radius: 0 0 14px 14px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--snow);
  background: var(--ink);
  box-shadow: 0 10px 24px -14px rgba(18, 51, 46, 0.9);
  transform: translate(-50%, -140%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: -3px;
}

/* ---------- 5. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 56px);
}

.container-narrow {
  width: 100%;
  max-width: 820px;
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}

.section { padding-block: clamp(48px, 8vw, 96px); }

.grid { display: grid; gap: clamp(20px, 3vw, 36px); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.pull-under-header { margin-top: calc(-1 * var(--header-h)); }

.bg-contour {
  background-color: var(--snow);
  background-image:
    radial-gradient(circle at 18% 8%, rgba(15, 110, 140, 0.09), transparent 56%),
    radial-gradient(circle at 92% 74%, rgba(224, 122, 63, 0.08), transparent 58%),
    repeating-linear-gradient(112deg, rgba(15, 110, 140, 0.055) 0 1px, transparent 1px 44px);
}

/* ==========================================================================
   6. 页头
   ========================================================================== */
.site-header { position: relative; z-index: 200; }

/* --- 6.1 左侧品牌轨道 --- */
.brand-rail { display: none; }

@media (min-width: 1024px) {
  .brand-rail {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 220;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 0 22px;
    background: linear-gradient(180deg, rgba(252, 253, 253, 0.88) 0%, rgba(216, 233, 239, 0.72) 100%);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    backdrop-filter: blur(16px) saturate(1.2);
    border-right: 1px solid var(--line);
  }
}

.rail-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2px;
}

.rail-hanger {
  display: block;
  width: 1px;
  height: 26px;
  background: linear-gradient(180deg, rgba(15, 110, 140, 0) 0%, var(--lake) 100%);
}

.rail-disc {
  position: relative;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--snow);
  background: radial-gradient(120% 120% at 30% 20%, #1A94B8 0%, var(--lake) 58%, var(--lake-deep) 100%);
  box-shadow:
    0 14px 26px -16px rgba(10, 75, 96, 0.95),
    inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.rail-disc::after {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1px solid rgba(224, 122, 63, 0.5);
  border-top-color: var(--sand);
  transition: transform 0.5s var(--ease);
}

.rail-mark:hover .rail-disc::after { transform: rotate(140deg); }

.rail-disc-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1;
}

@media (min-width: 1024px) {
  .rail-disc {
    animation:
      rail-drop 0.42s var(--ease) both,
      rail-float 6s ease-in-out 0.42s infinite;
  }
}

.rail-word {
  margin-top: 22px;
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.34em;
  color: var(--slate);
  user-select: none;
}

.rail-top {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lake);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition:
    opacity 0.28s var(--ease),
    transform 0.28s var(--ease),
    visibility 0.28s linear,
    background-color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.rail-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.rail-top:hover {
  background: rgba(15, 110, 140, 0.1);
  border-color: var(--line);
}

.rail-top-arrow {
  width: 9px;
  height: 9px;
  border-left: 2px solid currentColor;
  border-top: 2px solid currentColor;
  transform: rotate(45deg);
}

.rail-top-label {
  font-size: 10.5px;
  line-height: 1;
}

/* --- 6.2 顶部导航条 --- */
.header-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 210;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 26px);
  padding: 0 clamp(16px, 2.4vw, 34px);
  background: rgba(232, 241, 244, 0.62);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid rgba(15, 110, 140, 0.14);
  transition:
    height 0.24s var(--ease),
    background-color 0.24s var(--ease),
    border-color 0.24s var(--ease),
    box-shadow 0.24s var(--ease);
}

@media (min-width: 1024px) {
  .header-bar { left: var(--rail-w); }
}

.site-header[data-scrolled] .header-bar {
  height: 62px;
  background: rgba(252, 253, 253, 0.95);
  border-bottom-color: rgba(15, 110, 140, 0.24);
  box-shadow: 0 12px 32px -26px rgba(10, 75, 96, 0.85);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 2;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lake) 0%, var(--sand) 100%);
  will-change: transform;
}

/* --- 6.3 品牌名区 --- */
.bar-id {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 0 0 auto;
}

.bar-name {
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--lake-deep);
  white-space: nowrap;
}

.bar-name:hover { color: var(--lake); }

.bar-tagline {
  display: none;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.3;
  color: var(--slate);
  white-space: nowrap;
}

@media (min-width: 1180px) {
  .bar-tagline { display: block; }
}

/* --- 6.4 导航 --- */
.site-nav { min-width: 0; }

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

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 5px;
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--sand) 0%, rgba(224, 122, 63, 0) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.26s var(--ease);
}

.nav-link:hover { color: var(--lake); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--lake-deep);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--sand);
}

.nav-tail { display: none; }

.nav-tail-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(252, 253, 253, 0.72);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--lake-deep);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-tail-link:hover {
  background: var(--snow);
  border-color: var(--lake);
}

@media (min-width: 1024px) {
  .site-nav {
    display: flex;
    align-items: center;
    margin-left: auto;
  }
  .nav-list { gap: clamp(4px, 1.3vw, 20px); }
}

@media (min-width: 1024px) and (max-width: 1199px) {
  .nav-list { gap: 6px; }
  .nav-link { font-size: 12.5px; padding-inline: 4px; }
  .nav-link::after { left: 4px; right: 4px; }
}

/* --- 6.5 帮助入口与移动开关 --- */
.bar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}

@media (min-width: 1024px) {
  .bar-actions { margin-left: 6px; }
}

.help-entry {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--snow);
  background: linear-gradient(135deg, var(--lake) 0%, var(--lake-deep) 100%);
  box-shadow: 0 12px 24px -16px rgba(10, 75, 96, 0.95);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), filter 0.2s var(--ease);
}

.help-entry:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 28px -16px rgba(10, 75, 96, 0.98);
  filter: saturate(1.12);
}

.help-entry-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sand);
  box-shadow: 0 0 0 3px rgba(224, 122, 63, 0.3);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(252, 253, 253, 0.66);
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--lake-deep);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-toggle:hover {
  background: var(--snow);
  border-color: var(--lake);
}

.nav-toggle-bars {
  display: grid;
  gap: 3.5px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.18s var(--ease);
}

.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .bar-actions { margin-left: auto; }
}

@media (max-width: 480px) {
  .help-entry { padding: 8px 12px; font-size: 12px; gap: 6px; }
  .help-entry-dot { display: none; }
  .nav-toggle { padding: 8px 10px; }
  .nav-toggle-label { display: none; }
}

/* --- 6.6 移动端抽屉 --- */
@media (max-width: 1023px) {
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 205;
    display: flex;
    flex-direction: column;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    padding: 10px 20px 26px;
    background: var(--snow);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lift);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
      opacity 0.22s var(--ease),
      transform 0.22s var(--ease),
      visibility 0.22s linear;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-item + .nav-item { border-top: 1px solid rgba(15, 110, 140, 0.1); }

  .nav-link {
    display: block;
    padding: 14px 2px;
    font-size: 15px;
    font-weight: 500;
  }

  .nav-link::after { left: 2px; right: 2px; bottom: 9px; }

  .nav-link[aria-current="page"] { color: var(--lake); }

  .nav-tail {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }
}

/* ==========================================================================
   7. 页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  overflow: hidden;
  color: rgba(252, 253, 253, 0.82);
  background:
    radial-gradient(120% 92% at 86% 0%, rgba(15, 110, 140, 0.58) 0%, transparent 62%),
    linear-gradient(168deg, #0A4B60 0%, #0C5568 46%, #12332E 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(115deg, rgba(252, 253, 253, 0.05) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(-115deg, rgba(224, 122, 63, 0.07) 0 1px, transparent 1px 78px);
}

.footer-inner {
  position: relative;
  max-width: 1240px;
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) clamp(20px, 4vw, 56px) clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.65fr) minmax(0, 1fr);
  gap: clamp(28px, 4.4vw, 64px);
}

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

.footer-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer-disc {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1;
  color: var(--ink);
  background: linear-gradient(140deg, var(--sand-mist) 0%, #E8F1F4 100%);
  border: 1px solid rgba(252, 253, 253, 0.45);
  box-shadow: 0 0 0 4px rgba(252, 253, 253, 0.08);
}

.footer-name {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.footer-desc {
  margin-top: 18px;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(252, 253, 253, 0.66);
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 20px;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid rgba(252, 253, 253, 0.24);
  background: rgba(252, 253, 253, 0.08);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--snow);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-status:hover {
  background: rgba(252, 253, 253, 0.18);
  border-color: rgba(252, 253, 253, 0.42);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(46, 139, 107, 0.3);
  animation: pulse-dot 2.8s ease-in-out infinite;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 34px);
}

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: rgba(252, 253, 253, 0.5);
}

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

.footer-list-plain { gap: 12px; }

.footer-list a {
  display: inline-block;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(252, 253, 253, 0.82);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-list a:hover {
  color: #FFFFFF;
  border-bottom-color: rgba(224, 122, 63, 0.85);
}

.footer-strong {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: rgba(252, 253, 253, 0.92);
  overflow-wrap: anywhere;
}

.footer-meta {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(252, 253, 253, 0.55);
}

.footer-base {
  position: relative;
  max-width: 1240px;
  margin-inline: auto;
  padding: 18px clamp(20px, 4vw, 56px) 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  border-top: 1px solid rgba(252, 253, 253, 0.14);
  font-size: 12.5px;
  color: rgba(252, 253, 253, 0.55);
}

.footer-copy { line-height: 1.6; }

.footer-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

@media (max-width: 1023px) {
  .footer-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
  .footer-base { justify-content: flex-start; }
}

/* ==========================================================================
   8. 通用组件
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease),
    background-color 0.2s var(--ease),
    color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.btn-primary {
  color: var(--snow);
  background: linear-gradient(135deg, var(--lake) 0%, var(--lake-deep) 100%);
  box-shadow: 0 14px 28px -18px rgba(10, 75, 96, 0.95);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 34px -18px rgba(10, 75, 96, 0.98);
}

.btn-accent {
  color: #FFFFFF;
  background: linear-gradient(135deg, #EC8A50 0%, var(--sand-deep) 100%);
  box-shadow: 0 14px 28px -18px rgba(168, 73, 28, 0.9);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 34px -18px rgba(168, 73, 28, 0.95);
}

.btn-ghost {
  color: var(--lake-deep);
  background: rgba(252, 253, 253, 0.66);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  background: var(--snow);
  border-color: var(--lake);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

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

.breadcrumb li + li::before {
  content: "/";
  color: rgba(15, 110, 140, 0.36);
}

.breadcrumb a {
  color: var(--lake);
  transition: color 0.2s var(--ease);
}

.breadcrumb a:hover {
  color: var(--lake-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--sand-deep);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--sand);
}

.section-title {
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.24;
  color: var(--lake-deep);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.85;
  color: var(--slate);
}

.card {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: var(--snow);
  box-shadow: var(--shadow-soft);
  transition:
    transform 0.26s var(--ease),
    box-shadow 0.26s var(--ease),
    border-color 0.26s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: var(--line-strong);
}

.card-sand {
  background: var(--sand-mist);
  border-color: rgba(224, 122, 63, 0.24);
}

.card-glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  backdrop-filter: blur(14px) saturate(1.15);
  border-color: rgba(252, 253, 253, 0.62);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(15, 110, 140, 0.18);
  background: rgba(15, 110, 140, 0.1);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--lake-deep);
}

.tag-sand {
  color: var(--sand-deep);
  background: rgba(224, 122, 63, 0.12);
  border-color: rgba(224, 122, 63, 0.3);
}

.tag-ok {
  color: #1F6B50;
  background: rgba(46, 139, 107, 0.14);
  border-color: rgba(46, 139, 107, 0.32);
}

.tag-warn {
  color: #8A5310;
  background: rgba(201, 122, 24, 0.16);
  border-color: rgba(201, 122, 24, 0.34);
}

.ticks {
  display: grid;
  gap: 0;
  counter-reset: tick;
}

.tick {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: clamp(14px, 2vw, 24px);
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.tick:last-child { border-bottom: 1px solid var(--line); }

.tick-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: var(--sand-deep);
}

/* ---------- 9. 图片容器（页面阶段放占位） ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-m);
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(120% 120% at 20% 10%, rgba(15, 110, 140, 0.22) 0%, transparent 58%),
    linear-gradient(150deg, #E8F1F4 0%, var(--mist) 55%, var(--sand-mist) 100%);
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(15, 110, 140, 0.12);
}

.media-wide { aspect-ratio: 21 / 9; }
.media-square { aspect-ratio: 1 / 1; }
.media-portrait { aspect-ratio: 3 / 4; }

.media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 10. 动效 ---------- */
@keyframes rail-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

@keyframes rail-drop {
  from { opacity: 0; transform: translateY(-14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(46, 139, 107, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(46, 139, 107, 0.08); }
}

@keyframes reveal-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: no-preference) {
  [data-reveal][data-revealed="true"] {
    animation: reveal-up 0.55s var(--ease) both;
  }
}

/* ---------- 11. 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .rail-disc { animation: none !important; }
  .status-dot { animation: none !important; }
}