/* ==========================================================================
   ao3镜面网页版网址 · 全站样式表
   风格来源：暖绿 #73ac27 / 柔粉 #de839f / 深棕 #483917 的简约排版系统
   原则：不用投影，靠位移与层级表达深度；圆角克制；留白充足
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量
   -------------------------------------------------------------------------- */
:root {
  /* 品牌色 */
  --color-primary: #73ac27;
  --color-primary-hover: #609121;
  --color-primary-deep: #4c7318;
  --color-primary-soft: #eef4e2;
  --color-accent: #de839f;
  --color-accent-hover: #ca738d;
  --color-accent-soft: #fbe9ee;

  /* 背景与文本 */
  --color-bg: #ffffff;
  --color-surface: #f3f2ef;
  --color-surface-alt: #ebe9e2;
  --color-text: #483917;
  --color-text-soft: #5f5744;
  --color-text-muted: #6f6653;
  --color-text-faint: #aca48b;
  --color-inverse: #ffffff;

  /* 字体 */
  --font-sans: "Zen Kaku Gothic New", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI",
    sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* 间距（4px 基准） */
  --space-0: 0px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* 圆角 */
  --radius-sm: 5px;
  --radius-md: 10px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-2xl: 40px;
  --radius-full: 50px;

  /* 动效 */
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
  --duration: 0.5s;
  --duration-fast: 0.15s;

  /* 布局 */
  --container: 1120px;
  --header-h: 72px;
}

/* --------------------------------------------------------------------------
   2. 基础重置
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

button {
  font: inherit;
  color: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection {
  background-color: var(--color-accent-soft);
  color: var(--color-text);
}

@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;
  }
}

/* --------------------------------------------------------------------------
   3. 通用工具类
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-inverse);
  font-size: 14px;
  font-weight: 700;
  transition: top var(--duration-fast) var(--ease);
}

.skip-link:focus {
  top: var(--space-2);
}

.is-hidden {
  display: none !important;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  flex: none;
}

/* --------------------------------------------------------------------------
   4. 按钮
   -------------------------------------------------------------------------- */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 10px var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease), color var(--duration) var(--ease),
    opacity var(--duration) var(--ease), transform var(--duration-fast) var(--ease);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-inverse);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-accent {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-inverse);
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-surface-alt);
  color: var(--color-text);
}

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

.btn-sm {
  min-height: 36px;
  padding: var(--space-2) var(--space-3);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   5. 顶部公告条与页头
   -------------------------------------------------------------------------- */
.topbar {
  background-color: var(--color-surface-alt);
  color: var(--color-text-soft);
  font-size: 12px;
  line-height: 1.6;
}

.topbar .container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 36px;
  padding-block: var(--space-1);
}

.topbar-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  flex: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-surface-alt);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  transition: opacity var(--duration) var(--ease);
}

.logo:hover {
  opacity: 0.7;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary);
  flex: none;
}

.logo-mark svg {
  width: 24px;
  height: 24px;
}

.logo-text {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-sm);
  background-color: transparent;
  cursor: pointer;
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-text);
  transition: background-color var(--duration-fast) var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-text);
  transition: transform var(--duration-fast) var(--ease);
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.site-header[data-nav-open="true"] .nav-toggle-bars {
  background-color: transparent;
}

.site-header[data-nav-open="true"] .nav-toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-nav-open="true"] .nav-toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.2;
  transition: opacity var(--duration) var(--ease);
}

.nav-link:hover {
  opacity: 0.5;
}

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

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: var(--space-3);
  bottom: 10px;
  left: var(--space-3);
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   6. 首页：首屏
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-surface);
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: var(--space-6);
  align-items: start;
  padding-block: var(--space-8);
}

.hero-main {
  max-width: 620px;
}

.hero-title {
  margin-top: var(--space-3);
  font-size: clamp(30px, 4.6vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.hero-lead {
  margin-top: var(--space-4);
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.8;
}

.hero .btn-row {
  margin-top: var(--space-6);
}

.hero-note {
  margin-top: var(--space-5);
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-surface-alt);
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.7;
}

.status-card {
  padding: var(--space-6);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: transform var(--duration) var(--ease),
    background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.status-card:hover {
  transform: translateY(-6px);
  background-color: var(--color-bg);
  border-color: var(--color-surface-alt);
}

.status-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.status-title span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary-deep);
}

.status-title span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

.status-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.status-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px dashed var(--color-surface-alt);
  font-size: 14px;
  line-height: 1.5;
}

.status-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.status-row dt {
  color: var(--color-text-muted);
}

.status-row dd {
  font-weight: 700;
  color: var(--color-text);
}

.status-foot {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: 12px;
  line-height: 1.7;
}

/* 数据条 */
.stats {
  border-bottom: 1px solid var(--color-surface);
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  padding-block: var(--space-6);
}

.stat-value {
  color: var(--color-text);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-value em {
  color: var(--color-primary-hover);
  font-style: normal;
}

.stat-label {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.5;
}

/* 本页目录 */
.anchor-nav {
  border-bottom: 1px solid var(--color-surface);
  background-color: var(--color-bg);
}

.anchor-nav .container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding-block: var(--space-3);
}

.anchor-label {
  margin-right: var(--space-1);
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.anchor-nav a {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-full);
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.6;
  transition: background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.anchor-nav a:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary-soft);
  color: var(--color-primary-deep);
}

/* --------------------------------------------------------------------------
   7. 区块
   -------------------------------------------------------------------------- */
.section {
  padding-block: var(--space-8);
}

.section--surface {
  background-color: var(--color-surface);
  border-block: 1px solid var(--color-surface-alt);
}

.section-head {
  max-width: 780px;
  margin-bottom: var(--space-6);
}

.section-head h2 {
  margin-top: var(--space-2);
  font-size: clamp(22px, 3.2vw, 28px);
  font-weight: 700;
  line-height: 1.35;
}

.section-lead {
  margin-top: var(--space-3);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.section-lead a,
.section-foot a {
  color: var(--color-primary-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity var(--duration) var(--ease);
}

.section-lead a:hover,
.section-foot a:hover {
  opacity: 0.6;
}

.section-foot {
  margin-top: var(--space-6);
}

/* 提示条 */
.notice {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  background-color: var(--color-primary-soft);
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.8;
}

.notice strong {
  color: var(--color-primary-deep);
}

/* --------------------------------------------------------------------------
   8. 镜像线路列表
   -------------------------------------------------------------------------- */
.mirror-group + .mirror-group {
  margin-top: var(--space-8);
}

.group-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.group-head h3 {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.group-key {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-inverse);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.group-note {
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.mirror-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
}

.mirror-card {
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  transition: transform var(--duration) var(--ease),
    background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.mirror-card:hover,
.mirror-card:focus-within {
  transform: translateY(-6px);
  background-color: var(--color-bg);
  border-color: var(--color-surface-alt);
}

.mirror-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  height: 100%;
  padding: var(--space-5);
}

.mirror-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.mirror-index {
  color: var(--color-primary-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.mirror-domain {
  color: var(--color-text);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  word-break: break-word;
}

.mirror-url {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  word-break: break-all;
}

.mirror-desc {
  margin-top: var(--space-1);
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

.mirror-go {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  min-height: 44px;
  margin-top: auto;
  padding: 10px var(--space-4);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-inverse);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  transition: background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    transform var(--duration-fast) var(--ease);
}

.mirror-go::after {
  content: "\2192";
  transition: transform var(--duration-fast) var(--ease);
}

.mirror-card:hover .mirror-go {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.mirror-card:hover .mirror-go::after {
  transform: translateX(4px);
}

.mirror-card:active .mirror-go {
  transform: translateY(1px);
}

/* --------------------------------------------------------------------------
   9. 流程步骤
   -------------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  counter-reset: step;
}

.step {
  position: relative;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: transform var(--duration) var(--ease),
    background-color var(--duration) var(--ease);
}

.step:hover {
  transform: translateY(-6px);
  background-color: var(--color-surface-alt);
}

.step::before {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-primary-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
}

.step h3 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.step p {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   10. 表格
   -------------------------------------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  -webkit-overflow-scrolling: touch;
}

table.data {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}

table.data th {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-surface-alt);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

table.data td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-surface);
  color: var(--color-text-soft);
  line-height: 1.75;
  vertical-align: top;
}

table.data tbody tr:last-child td {
  border-bottom: 0;
}

table.data td:first-child {
  color: var(--color-text);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   11. 检查清单
   -------------------------------------------------------------------------- */
.checklist {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
}

.checklist li {
  position: relative;
  padding-left: var(--space-8);
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.checklist li::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 0;
  width: 18px;
  height: 18px;
  border: 1px solid #cfe0b0;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-soft);
}

.checklist li::after {
  content: "";
  position: absolute;
  top: 9px;
  left: 5px;
  width: 7px;
  height: 4px;
  border-bottom: 1.5px solid var(--color-primary-deep);
  border-left: 1.5px solid var(--color-primary-deep);
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   12. 安全提示 / 强调块
   -------------------------------------------------------------------------- */
.band {
  padding: var(--space-6);
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
}

.band h2 {
  font-size: clamp(20px, 2.8vw, 24px);
  line-height: 1.4;
}

.band-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.band-item {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-surface);
}

.band-item strong {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.5;
}

.band-item p {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   13. 常见问题
   -------------------------------------------------------------------------- */
.faq {
  display: grid;
  gap: var(--space-3);
}

.faq details {
  padding: 0 var(--space-5);
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  transition: background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.faq details:hover {
  border-color: var(--color-primary-soft);
}

.faq details[open] {
  border-color: var(--color-primary);
  background-color: var(--color-bg);
}

.faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  flex: none;
  width: 22px;
  color: var(--color-primary-deep);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
}

.faq details[open] summary::after {
  content: "\2212";
}

.faq-answer {
  padding-bottom: var(--space-4);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.85;
}

.faq-answer a {
  color: var(--color-primary-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   14. 卡片链接
   -------------------------------------------------------------------------- */
.link-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.link-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-6);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: transform var(--duration) var(--ease),
    background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.link-card:hover {
  transform: translateY(-6px);
  background-color: var(--color-bg);
  border-color: var(--color-surface-alt);
}

.link-card .link-card-label {
  color: var(--color-primary-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.link-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.link-card p {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

.link-card .link-card-go {
  margin-top: var(--space-2);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
}

.link-card .link-card-go::after {
  content: " \2192";
}

/* --------------------------------------------------------------------------
   15. 长篇正文（指南 / 关于）
   -------------------------------------------------------------------------- */
.page-head {
  border-bottom: 1px solid var(--color-surface);
  background-color: var(--color-surface);
}

.page-head .container {
  position: relative;
  z-index: 1;
  padding-block: var(--space-8);
}

.page-head h1 {
  margin-top: var(--space-2);
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1.3;
}

.page-head .section-lead {
  max-width: 740px;
}

.page-decor {
  position: absolute;
  top: 4px;
  right: 24px;
  z-index: 0;
  color: var(--color-surface-alt);
  font-size: clamp(56px, 11vw, 130px);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
}

.page-head {
  position: relative;
  overflow: hidden;
}

.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  padding-block: var(--space-4) 0;
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.crumb li {
  display: inline-flex;
  align-items: center;
}

.crumb li + li::before {
  content: "/";
  margin-inline: var(--space-2);
  color: var(--color-text-faint);
}

.crumb a {
  transition: opacity var(--duration) var(--ease);
}

.crumb a:hover {
  opacity: 0.5;
}

.crumb [aria-current="page"] {
  color: var(--color-text-soft);
}

.prose {
  max-width: 820px;
}

.prose > * + * {
  margin-top: var(--space-4);
}

.prose h2 {
  margin-top: var(--space-8);
  font-size: clamp(20px, 2.8vw, 26px);
  font-weight: 700;
  line-height: 1.4;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin-top: var(--space-6);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
}

.prose p {
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.85;
}

.prose a {
  color: var(--color-primary-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: opacity var(--duration) var(--ease);
}

.prose a:hover {
  opacity: 0.6;
}

.prose ul.bullets,
.prose ol.numbered {
  display: grid;
  gap: var(--space-3);
}

.prose ul.bullets li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.prose ul.bullets li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

.prose ol.numbered {
  counter-reset: prose-step;
}

.prose ol.numbered li {
  position: relative;
  padding-left: var(--space-8);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
  counter-increment: prose-step;
}

.prose ol.numbered li::before {
  content: counter(prose-step, decimal-leading-zero);
  position: absolute;
  top: 1px;
  left: 0;
  color: var(--color-primary-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.prose blockquote {
  padding: var(--space-4);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.prose .callout {
  padding: var(--space-4);
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
}

.prose .callout p {
  font-size: 15px;
}

.prose .callout strong {
  color: var(--color-text);
}

/* 页面索引 */
.page-index {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-3);
}

.page-index li {
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  transition: transform var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.page-index li:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.page-index a {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-4);
}

.page-index strong {
  font-size: 15px;
  line-height: 1.5;
}

.page-index span {
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   16. 中转确认页
   -------------------------------------------------------------------------- */
.jump-wrap {
  padding-block: var(--space-8);
}

.jump-card {
  max-width: 680px;
  margin-inline: auto;
  padding: var(--space-8);
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.jump-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background-color: var(--color-accent-soft);
  color: #8a4d5f;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.jump-card h1 {
  margin-top: var(--space-3);
  font-size: clamp(22px, 3.4vw, 28px);
  font-weight: 700;
  line-height: 1.35;
}

.jump-card h1:first-child {
  margin-top: 0;
}

.jump-desc {
  margin-top: var(--space-3);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.jump-target {
  margin-top: var(--space-5);
  padding: var(--space-5);
  border: 1px solid var(--color-surface-alt);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.jump-target-label {
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.jump-domain {
  margin-top: var(--space-1);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  word-break: break-all;
  min-height: 1.4em;
}

.jump-url {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border: 1px dashed var(--color-surface-alt);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  word-break: break-all;
}

.jump-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.jump-actions .btn-primary {
  flex: 1 1 240px;
}

.jump-back-line {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.7;
}

.jump-back-line a {
  color: var(--color-primary-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.jump-error {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-soft);
  color: #7a4356;
  font-size: 14px;
  line-height: 1.75;
}

.jump-notes {
  display: grid;
  gap: var(--space-3);
  max-width: 680px;
  margin: var(--space-6) auto 0;
}

.jump-notes li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

.jump-notes li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
}

.jump-noscript {
  max-width: 680px;
  margin: var(--space-5) auto 0;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-primary-soft);
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   17. 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: var(--space-8);
  padding-block: var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-surface-alt);
  background-color: var(--color-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: var(--space-6);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.footer-logo .logo-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
}

.footer-logo .logo-mark svg {
  width: 18px;
  height: 18px;
}

.footer-desc {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.8;
}

.footer-meta {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: 12px;
  line-height: 1.6;
}

.footer-title {
  margin-bottom: var(--space-3);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.footer-col ul {
  display: grid;
  gap: var(--space-1);
}

.footer-col li a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.6;
  transition: opacity var(--duration) var(--ease);
}

.footer-col li a:hover {
  opacity: 0.5;
}

.footer-note {
  color: var(--color-text-muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.footer-note + .footer-note {
  margin-top: var(--space-2);
}

.footer-note a {
  color: var(--color-primary-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-surface-alt);
  color: var(--color-text-muted);
  font-size: 12px;
  line-height: 1.7;
}

.ad-slot {
  margin-top: var(--space-4);
}

.ad-slot:empty {
  display: none;
}

/* 回到顶部 */
.to-top {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 9;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-primary-hover);
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-inverse);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease),
    transform 0.3s var(--ease), background-color var(--duration) var(--ease);
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background-color: var(--color-primary-hover);
}

/* --------------------------------------------------------------------------
   18. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  .hero .container {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-5);
  }

  .hero-main {
    max-width: none;
  }

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

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

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

@media (max-width: 899px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) var(--space-4) var(--space-4);
    border-bottom: 1px solid var(--color-surface-alt);
    background-color: var(--color-bg);
  }

  .site-header[data-nav-open="true"] .site-nav {
    display: flex;
  }

  .nav-link {
    padding: var(--space-3) var(--space-2);
    border-bottom: 1px solid var(--color-surface);
  }

  .nav-link[aria-current="page"] {
    padding-left: var(--space-2);
  }

  .nav-link[aria-current="page"]::after {
    right: auto;
    bottom: 6px;
    left: var(--space-2);
    width: 24px;
  }
}

@media (max-width: 767px) {
  .container {
    padding-inline: var(--space-4);
  }

  .logo {
    font-size: 16px;
    gap: var(--space-2);
  }

  .logo-mark {
    width: 32px;
    height: 32px;
  }

  .logo-mark svg {
    width: 21px;
    height: 21px;
  }

  .hero .container,
  .page-head .container,
  .jump-wrap {
    padding-block: var(--space-6);
  }

  .stats .container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .section {
    padding-block: var(--space-6);
  }

  .section--surface {
    padding-block: var(--space-6);
  }

  .mirror-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .steps,
  .link-cards,
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .jump-card {
    padding: var(--space-5);
    border-radius: var(--radius-md);
  }

  .jump-actions .btn {
    flex: 1 1 100%;
  }

  .band {
    padding: var(--space-5);
  }

  .footer-bottom {
    display: grid;
    gap: var(--space-1);
  }

  .to-top {
    right: var(--space-3);
    bottom: var(--space-3);
  }
}

@media (max-width: 359px) {
  .logo-text {
    font-size: 14px;
  }
}