/* ============ 变量 ============ */
:root {
  color-scheme: light;
  --color-primary: #0B3D2E;
  --color-primary-deep: #072A20;
  --color-primary-light: #145240;
  --color-accent: #D4AF37;
  --color-accent-light: #E8C96A;
  --color-ink: #2C2C2C;
  --color-white: #FFFFFF;
  --color-off-white: #F9F8F4;
  --color-success: #4CAF50;
  --color-warning: #F0E68C;
  --color-danger: #8B0000;
  --color-cyan: #008B8B;
  --color-bg-light: #F5F5F5;
  --color-line: rgba(11, 61, 46, 0.12);
  --font-heading: 'Oswald', 'Noto Sans SC', sans-serif;
  --font-body: 'Source Serif', 'Noto Serif SC', serif;
  --font-data: 'Oswald', 'Roboto Mono', monospace;
  --container-width: 1200px;
  --header-height: 76px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 10px rgba(7, 42, 32, 0.08);
  --shadow-md: 0 10px 28px rgba(7, 42, 32, 0.14);
  --shadow-lg: 0 18px 48px rgba(7, 42, 32, 0.2);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s var(--ease-out);
  --transition-slow: 0.65s var(--ease-out);
}

html[data-dark] {
  color-scheme: dark;
  --color-primary: #0B3D2E;
  --color-primary-deep: #06241B;
  --color-primary-light: #145240;
  --color-bg-light: #131A16;
  --color-off-white: #141A17;
  --color-ink: #E3E7E4;
  --color-white: #19211D;
  --color-line: rgba(212, 175, 55, 0.14);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 10px 28px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.7);
}

/* ============ Reset & 基础 ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; line-height: 1.5; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-bg-light);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background 0.4s ease, color 0.4s ease;
}

html[data-dark] body { background: #0E1511; color: #D8DCD9; }

img, svg, video { display: block; max-width: 100%; height: auto; }
input, button, select, textarea { font: inherit; }
a { color: var(--color-cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
ul, ol { list-style: none; }
button { background: none; border: 0; cursor: pointer; }

::selection { background: var(--color-accent); color: var(--color-primary-deep); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: 2px; }

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

.skip-link {
  position: fixed;
  top: -90px;
  left: 16px;
  z-index: 2000;
  background: var(--color-accent);
  color: var(--color-primary-deep);
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transition: top 0.25s ease;
}
.skip-link:focus-visible { top: 16px; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary-deep);
  box-shadow: 0 4px 18px rgba(212, 175, 55, 0.35);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.btn--primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(212, 175, 55, 0.5);
  color: var(--color-primary-deep);
}

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

.btn--gold {
  background: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.btn--gold:hover { background: var(--color-accent); color: var(--color-primary-deep); }

.btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--color-white);
}
.btn--ghost:hover { background: rgba(212, 175, 55, 0.2); border-color: var(--color-accent); color: var(--color-accent-light); }

/* ============ 容器 / 分区 ============ */
.section { padding: 76px 0; position: relative; }
.section--dark { background: var(--color-primary-deep); color: rgba(255, 255, 255, 0.85); }
.section--light { background: var(--color-bg-light); }
.section--white { background: var(--color-white); }

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 44px;
}
.section-header__body { max-width: 540px; }
.section-header__title {
  font-family: var(--font-heading);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--color-primary);
  letter-spacing: 0.01em;
}
.section--dark .section-header__title { color: var(--color-white); }
.section-header__lead { margin-top: 12px; color: rgba(44, 44, 44, 0.72); font-size: 16px; }
.section--dark .section-header__lead { color: rgba(255, 255, 255, 0.62); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}
.section-label::before {
  content: '';
  width: 26px;
  height: 1px;
  background: var(--color-accent);
  flex: none;
}
.section--dark .section-label { color: var(--color-accent-light); }

/* ============ 编号章节 ============ */
.chapter {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: start;
  margin-bottom: 32px;
}
.chapter__index {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(44px, 6vw, 80px);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--color-accent);
  user-select: none;
  min-width: 0.8em;
}
.chapter__body { padding-top: 4px; }
.chapter__label {
  display: block;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.chapter__title {
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.12;
}
.section--dark .chapter__title { color: var(--color-white); }
.chapter__sub { margin-top: 10px; font-size: 15px; color: rgba(44, 44, 44, 0.68); }
.section--dark .chapter__sub { color: rgba(255, 255, 255, 0.6); }

/* ============ 网格 / 卡片 ============ */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-left-color: var(--color-accent-light); }
.card__title { font-family: var(--font-heading); font-size: 20px; font-weight: 700; color: var(--color-primary); margin-bottom: 10px; line-height: 1.2; }
.section--dark .card__title { color: var(--color-white); }
.card__meta { font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 8px; }
.card__body { font-size: 15px; color: var(--color-ink); line-height: 1.7; }

html[data-dark] .card { background: #1A211D; }

/* ============ 图片容器 ============ */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
}
.media-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(11, 61, 46, 0.18);
  border-radius: var(--radius-md);
  pointer-events: none;
  z-index: 1;
}
.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease-out), filter 0.6s var(--ease-out);
}
.media-frame:hover img { transform: scale(1.03); }

.media-frame--portrait { aspect-ratio: 4 / 5; }
.media-frame--landscape { aspect-ratio: 3 / 2; }
.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame--pitch { background: #0E2A20; }
.media-frame--pitch img { filter: saturate(0.82) contrast(1.08); }

html[data-dark] .media-frame { border-color: rgba(212, 175, 55, 0.14); }
html[data-dark] .media-frame::after { border-color: rgba(255, 255, 255, 0.1); }

/* ============ 斜角 / 网格底纹 ============ */
.clip-angle {
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}
.clip-angle--lg {
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}
.grid-bg {
  background-image:
    linear-gradient(rgba(11, 61, 46, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 61, 46, 0.05) 1px, transparent 1px);
  background-size: 34px 34px;
}
.section--dark .grid-bg,
.grid-bg--dark {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
}

/* ============ 数据 / 情报组件 ============ */
.stat {
  padding: 22px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.stat::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--color-accent);
}
.stat__value {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}
.section--dark .stat__value { color: var(--color-accent); }
.stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink);
  opacity: 0.75;
}
html[data-dark] .stat { background: #1A211D; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.data-table th {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  text-align: left;
  padding: 14px 16px;
  background: rgba(212, 175, 55, 0.1);
  border-bottom: 2px solid var(--color-accent);
  white-space: nowrap;
}
.data-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--color-line);
}
.data-table tbody tr { transition: background 0.15s ease; }
.data-table tbody tr:hover td { background: rgba(212, 175, 55, 0.07); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table--striped tbody tr:nth-child(even) { background: var(--color-bg-light); }
.data-table--striped tbody tr:nth-child(even):hover td { background: rgba(212, 175, 55, 0.07); }
html[data-dark] .data-table { background: #19211D; }
html[data-dark] .data-table th { color: var(--color-accent-light); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 13px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.6;
  text-transform: uppercase;
  background: var(--color-bg-light);
  color: var(--color-ink);
  border: 1px solid var(--color-line);
  white-space: nowrap;
}
.tag--gold { background: var(--color-accent); color: var(--color-primary-deep); border-color: var(--color-accent); }
.tag--danger { background: var(--color-danger); color: #fff; border-color: var(--color-danger); }
.tag--success { background: var(--color-success); color: #fff; border-color: var(--color-success); }
.tag--outline { background: transparent; border: 1px solid currentColor; }

/* ============ 技能树 ============ */
.skill-tree { position: relative; display: grid; gap: 20px; }
.skill-tree::before {
  content: '';
  position: absolute;
  left: 22px;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--color-accent) 0 4px, transparent 4px 10px);
  opacity: 0.55;
}
.skill-tree__node {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  align-items: start;
  padding: 22px 24px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.skill-tree__node:hover { transform: translateX(6px); box-shadow: var(--shadow-md); }
.skill-tree__node::before {
  content: attr(data-step);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 28px;
  line-height: 1;
  color: var(--color-accent);
  text-align: right;
}
.skill-tree__node-title { font-family: var(--font-heading); font-size: 18px; font-weight: 700; color: var(--color-primary); margin-bottom: 4px; line-height: 1.2; }
.skill-tree__node-desc { font-size: 14px; color: rgba(44, 44, 44, 0.7); }
html[data-dark] .skill-tree__node { background: #1A211D; }
html[data-dark] .skill-tree__node-title { color: #fff; }

/* ============ 面包屑 / 分页 ============ */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li:not(:last-child)::after { content: '/'; color: var(--color-accent); }
.breadcrumbs a { color: var(--color-primary); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-accent); }
.breadcrumbs [aria-current="page"] { color: var(--color-accent); font-weight: 700; }
html[data-dark] .breadcrumbs a { color: rgba(255, 255, 255, 0.72); }
html[data-dark] .breadcrumbs a:hover { color: var(--color-accent-light); }

.pagination { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; align-items: center; margin-top: 48px; }
.pagination__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 14px;
  text-decoration: none;
  color: var(--color-primary);
  background: var(--color-white);
  transition: all var(--transition-fast);
}
.pagination__item:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pagination__item[aria-current="page"] { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-primary-deep); font-weight: 700; }

/* ============ 头部区域 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 55%, #0E4A38 100%);
  border-bottom: 1px solid rgba(212, 175, 55, 0.32);
  transition: box-shadow var(--transition-base), background 0.4s ease;
}
.site-header[data-scrolled] { box-shadow: 0 10px 34px rgba(4, 24, 18, 0.4); background: linear-gradient(135deg, #06241B 0%, var(--color-primary-deep) 60%, #0A3528 100%); }

.site-header__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  height: var(--header-height);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  transition: height var(--transition-base), padding var(--transition-base);
}
.site-header[data-scrolled] .site-header__inner { height: 62px; padding-top: 6px; padding-bottom: 6px; }

/* 品牌 */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: none;
}
.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--color-accent);
  color: var(--color-primary-deep);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.04em;
  border-radius: 12px 4px 12px 4px;
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.35);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.site-brand:hover .site-brand__mark { transform: rotate(-4deg) scale(1.04); box-shadow: 0 6px 22px rgba(212, 175, 55, 0.5); }
.site-brand__text {
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-white);
  white-space: nowrap;
  transition: font-size var(--transition-base);
}
.site-header[data-scrolled] .site-brand__text { font-size: 19px; }
.site-brand--footer .site-brand__text { color: var(--color-white); font-size: 22px; }

/* 悬浮胶囊导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background var(--transition-base), border-color var(--transition-base);
}
.site-nav a {
  display: block;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.84);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.site-nav a:hover { background: rgba(212, 175, 55, 0.18); color: var(--color-accent-light); }
.site-nav a[aria-current="page"] { background: var(--color-accent); color: var(--color-primary-deep); font-weight: 700; }
.site-nav a[aria-current="page"]:hover { background: var(--color-accent-light); color: var(--color-primary-deep); }

/* 头部动作组 */
.site-actions { display: flex; align-items: center; gap: 10px; flex: none; }

.icon-btn {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  transition: all var(--transition-fast);
}
.icon-btn:hover { background: rgba(212, 175, 55, 0.22); border-color: var(--color-accent); color: var(--color-accent-light); }
.icon-btn[data-open] { background: var(--color-accent); color: var(--color-primary-deep); border-color: var(--color-accent); }

.search-toggle__icon { position: relative; display: block; width: 17px; height: 17px; }
.search-toggle__icon::before {
  content: '';
  position: absolute;
  inset: 1px;
  border: 2px solid currentColor;
  border-radius: 50%;
}
.search-toggle__icon::after {
  content: '';
  position: absolute;
  right: -3px;
  bottom: -1px;
  width: 7px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transform: rotate(45deg);
}

.theme-toggle__icon { font-size: 19px; line-height: 1; display: block; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  transition: background var(--transition-fast), border-color var(--transition-fast);
  padding: 0;
}
.nav-toggle:hover { background: rgba(212, 175, 55, 0.22); border-color: var(--color-accent); }
.nav-toggle__line { display: block; width: 18px; height: 2px; background: var(--color-white); border-radius: 2px; transition: transform var(--transition-fast), opacity var(--transition-fast), background var(--transition-fast); }
.nav-toggle:hover .nav-toggle__line { background: var(--color-accent-light); }
.nav-toggle[data-open] .nav-toggle__line:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--color-accent-light); }
.nav-toggle[data-open] .nav-toggle__line:nth-child(2) { opacity: 0; }
.nav-toggle[data-open] .nav-toggle__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--color-accent-light); }

/* 检索面板 */
.search-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(6, 36, 27, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 0 24px;
  border-bottom: 2px solid var(--color-accent);
  display: none;
  box-shadow: var(--shadow-lg);
  z-index: 90;
}
.search-panel[data-open] { display: block; animation: panelDrop 0.3s var(--ease-out); }

@keyframes panelDrop {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.search-panel__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 0;
}
.search-panel__title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  white-space: nowrap;
  flex: none;
}
.search-panel__box {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  transition: border-color var(--transition-fast);
}
.search-panel__box:focus-within { border-color: var(--color-accent); }
.search-panel__icon {
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  position: relative;
  flex: none;
}
.search-panel__icon::after {
  content: '';
  position: absolute;
  right: -5px;
  bottom: -2px;
  width: 7px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: rotate(45deg);
}
.search-panel__input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--color-white);
  font-size: 15px;
  min-width: 0;
}
.search-panel__input::placeholder { color: rgba(255, 255, 255, 0.4); }
.search-panel__input:focus { outline: none; }
.search-panel__hint {
  flex: none;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.38);
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
}
.search-panel__close {
  flex: none;
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}
.search-panel__close:hover { color: var(--color-accent-light); border-color: rgba(212, 175, 55, 0.4); background: rgba(212, 175, 55, 0.1); }

/* ============ 页脚区域 ============ */
.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--color-primary-deep) 0%, var(--color-primary) 55%, #0A3528 100%);
  color: rgba(255, 255, 255, 0.84);
}

/* 顶部艾德莱斯绸纹理线 */
.site-footer__decor {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background:
    repeating-linear-gradient(45deg, var(--color-accent) 0 6px, transparent 6px 14px, #1E6E52 14px 18px, transparent 18px 26px, var(--color-accent) 26px 30px, transparent 30px 40px);
  opacity: 0.8;
}

/* 天山棱线水印剪影 */
.site-footer::after {
  content: '';
  position: absolute;
  right: -30px;
  bottom: -20px;
  width: 42%;
  min-width: 320px;
  height: 160px;
  background:
    linear-gradient(155deg, transparent 58%, rgba(212, 175, 55, 0.09) 58.5%),
    linear-gradient(205deg, transparent 66%, rgba(255, 255, 255, 0.05) 66.5%),
    linear-gradient(130deg, transparent 46%, rgba(212, 175, 55, 0.06) 46.5%);
  background-size: 55% 100%, 70% 100%, 45% 100%;
  background-repeat: no-repeat;
  background-position: 0 100%, 100% 100%, 0 100%;
  transform: skewX(2deg);
  pointer-events: none;
}

.site-footer__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 68px 24px 52px;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1.1fr;
  gap: 52px;
  position: relative;
  z-index: 1;
}

.site-footer__desc {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.62);
  max-width: 38em;
}

.site-footer__statement {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.46);
}

.site-footer__title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-footer__title::before { content: ''; width: 20px; height: 2px; background: var(--color-accent); flex: none; }

.site-footer__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
}
.site-footer__list a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}
.site-footer__list a:hover { color: var(--color-accent-light); padding-left: 4px; }

.site-footer__contact { display: grid; gap: 14px; }
.site-footer__contact-item { display: grid; grid-template-columns: 46px 1fr; gap: 8px; font-size: 14px; line-height: 1.6; }
.site-footer__contact-label {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding-top: 2px;
}
.site-footer__contact-value { color: rgba(255, 255, 255, 0.84); }

.site-footer__service {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.22);
  padding: 16px 0;
}
.site-footer__bottom-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.52);
}
.site-footer__slogan { font-family: var(--font-heading); font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(212, 175, 55, 0.75); }
.site-footer__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.site-footer__icp { font-family: var(--font-heading); font-size: 13px; letter-spacing: 0.08em; }
.site-footer__separator { color: rgba(212, 175, 55, 0.5); }
.site-footer__copy { font-size: 13px; }

/* ============ 返回顶部 ============ */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-accent);
  background: var(--color-primary);
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all var(--transition-base);
  box-shadow: 0 6px 24px rgba(7, 42, 32, 0.35);
}
.back-top[data-visible] { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--color-accent); color: var(--color-primary-deep); }
.back-top__icon { font-size: 22px; line-height: 1; font-weight: 700; }

/* ============ 滚动显现 ============ */
[data-reveal],
[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
[data-reveal="left"] { transform: translateX(-34px); }
[data-reveal="right"] { transform: translateX(34px); }
[data-reveal="scale"] { transform: scale(0.94); }

[data-reveal-group] > *:nth-child(1) { --reveal-delay: 0ms; }
[data-reveal-group] > *:nth-child(2) { --reveal-delay: 70ms; }
[data-reveal-group] > *:nth-child(3) { --reveal-delay: 140ms; }
[data-reveal-group] > *:nth-child(4) { --reveal-delay: 210ms; }
[data-reveal-group] > *:nth-child(5) { --reveal-delay: 280ms; }
[data-reveal-group] > *:nth-child(6) { --reveal-delay: 350ms; }

[data-reveal][data-revealed],
[data-reveal-group][data-revealed] > * {
  opacity: 1;
  transform: none;
}

@media (max-width: 600px) {
  [data-reveal="left"], [data-reveal="right"] { transform: translateY(28px); }
  [data-reveal][data-revealed], [data-reveal="left"][data-revealed], [data-reveal="right"][data-revealed] { transform: none; }
}

/* ============ 响应式 ============ */
@media (max-width: 1060px) {
  .site-nav { gap: 0; }
  .site-nav a { padding: 9px 13px; font-size: 13px; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: calc(100% - 6px);
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    display: none;
    padding: 10px;
    border-radius: var(--radius-lg);
    background: linear-gradient(155deg, #0A3326 0%, var(--color-primary) 60%, #0E4A38 100%);
    border: 1px solid rgba(212, 175, 55, 0.3);
    box-shadow: var(--shadow-lg);
  }
  .site-nav[data-open] { display: flex; animation: navDrop 0.3s var(--ease-out); }
  .site-nav a { padding: 14px 20px; border-radius: var(--radius-md); font-size: 15px; text-align: left; border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
  .site-nav a:last-child { border-bottom: 0; }
  .site-nav a[aria-current="page"] { background: var(--color-accent); color: var(--color-primary-deep); }

  @keyframes navDrop {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .site-header__inner { padding: 8px 16px; gap: 12px; }
  .site-brand__text { font-size: 18px; }
  .site-header[data-scrolled] .site-brand__text { font-size: 18px; }

  .search-panel__inner { flex-wrap: wrap; gap: 12px; }
  .search-panel__box { min-width: 0; }

  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .site-footer__inner { grid-template-columns: 1fr 1fr; gap: 40px 36px; }
  .site-footer__col--brand { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .section { padding: 52px 0; }
  .section-header { margin-bottom: 30px; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }

  .site-header__inner { height: 66px; }
  .site-header[data-scrolled] .site-header__inner { height: 58px; }
  .site-header[data-scrolled] .site-brand__mark { width: 34px; height: 34px; font-size: 16px; }

  .site-actions { gap: 6px; }
  .icon-btn, .nav-toggle { width: 38px; height: 38px; }
  .theme-toggle, .search-toggle { display: inline-flex; }
  .search-toggle + .theme-toggle { display: none; }

  .search-panel { padding: 0 16px; }
  .search-panel__inner { padding: 14px 0; }
  .search-panel__hint { display: none; }
  .search-panel__close { font-size: 12px; padding: 6px 12px; }

  .site-footer__inner { grid-template-columns: 1fr; gap: 34px; padding: 50px 20px 40px; }
  .site-footer__list { grid-template-columns: 1fr 1fr; }
  .site-footer__bottom-inner { flex-direction: column; text-align: center; gap: 6px; }
  .site-footer::after { opacity: 0.6; width: 70%; right: -40px; }

  .back-top { right: 16px; bottom: 16px; width: 44px; height: 44px; }

  .data-table th, .data-table td { padding: 11px 12px; font-size: 14px; }
}

/* ============ 减少动效 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal], [data-reveal-group] > * {
    opacity: 1;
    transform: none;
  }
}