/* =========================================================================
襄阳特种工报名培训与证书办理
   全站统一样式：办公潮流风 · 浅蓝 / 浅紫 / 纯白 · 左侧固定导航 + 右侧阶梯内容
   目录：
     01 变量与基础
     02 左侧固定导航
     03 顶栏与面包屑
     04 首屏五种骨架
     05 通用区块与标题
     06 卡片体系
     07 步骤、阶梯、表格
     08 图文、图组、说明块
     09 联系、CTA、表单
     10 资讯模块
     11 页脚、返回顶部
     12 动画、响应式
   ========================================================================= */

/* ===== 01 变量与基础 ===== */
:root {
  --rail-w: 252px;
  --max: 1160px;

  --blue-50: #f5f9ff;
  --blue-100: #e7f0fe;
  --blue-200: #d3e4fd;
  --blue-300: #a9c8f8;
  --blue-500: #4a7fe3;
  --blue-600: #2f6bd6;
  --blue-700: #1f4fa8;

  --violet-50: #f8f5ff;
  --violet-100: #efe9fe;
  --violet-200: #e0d5fb;
  --violet-300: #c9b8f5;
  --violet-600: #6f52cf;
  --violet-700: #543ba8;

  --ink: #182033;
  --ink-2: #3d4a63;
  --ink-3: #6f7c93;
  --line: #e4ebf7;
  --line-2: #d6e2f5;

  --r-lg: 20px;
  --r-md: 14px;
  --r-sm: 10px;

  --shadow-s: 0 6px 18px -10px rgba(28, 58, 120, .28);
  --shadow-m: 0 18px 42px -26px rgba(28, 58, 120, .40);
  --shadow-l: 0 30px 70px -34px rgba(28, 58, 120, .46);

  --font: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  background:
    radial-gradient(900px 520px at 90% -6%, rgba(159, 186, 246, .30), transparent 62%),
    radial-gradient(760px 480px at 4% 22%, rgba(196, 178, 246, .22), transparent 60%),
    linear-gradient(180deg, #f7faff 0%, #ffffff 42%, #fbfaff 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.2px;
}

p { margin: 0; }

ul, ol { margin: 0; padding: 0; }

::selection { background: var(--blue-200); color: var(--ink); }

/* 跳到主内容（可访问性） */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 999;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--blue-700);
  color: #fff;
  font-size: 13px;
  transition: top .25s ease;
}
.skip-link:focus { top: 14px; }

/* ===== 02 左侧固定导航 ===== */
.rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 70;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 46%, #f7f4ff 100%);
  border-right: 1px solid var(--line-2);
  box-shadow: 14px 0 44px -38px rgba(31, 60, 120, .55);
}

.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 18px 18px 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: #fff;
  object-fit: cover;
  flex: none;
}

.brand-txt { min-width: 0; }
.brand-txt b {
  display: block;
  font-size: 15.5px;
  line-height: 1.3;
  letter-spacing: .3px;
  white-space: nowrap;
}
.brand-txt em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-3);
}

.rail-close {
  display: none;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: #fff;
  color: var(--ink-2);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.rail-nav {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 14px 12px 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--blue-200) transparent;
}
.rail-nav::-webkit-scrollbar { width: 6px; }
.rail-nav::-webkit-scrollbar-thumb {
  background: var(--blue-200);
  border-radius: 99px;
}

.rail-group { margin-bottom: 18px; }

.rail-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  padding: 0 8px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--ink-3);
}
.rail-title::before {
  content: "";
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-500), var(--violet-300));
}

.rail-list { list-style: none; display: grid; gap: 1px; }

.rail-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px 8px 14px;
  border-radius: 9px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-2);
  transition: background .25s ease, color .25s ease, padding .25s ease;
}
.rail-link::before {
  content: "";
  position: absolute;
  left: 6px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--blue-200);
  transition: background .25s ease;
}
.rail-link:hover {
  background: var(--blue-50);
  color: var(--blue-700);
  padding-left: 18px;
}
.rail-link:hover::before { background: var(--blue-500); }

.rail-link.is-active {
  background: linear-gradient(100deg, var(--blue-100), var(--violet-100));
  color: var(--blue-700);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--line-2);
}
.rail-link.is-active::before { background: var(--violet-600); }

.rail-foot {
  flex: none;
  margin: 0 12px 14px;
  padding: 14px;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.rail-hot {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--ink-3);
}
.rail-tel {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--blue-700);
}
.rail-mail {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--ink-3);
  word-break: break-all;
}
.rail-foot small {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink-3);
}

.rail-mask {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 65;
  background: rgba(20, 28, 48, .38);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
}
.rail-mask.is-open { opacity: 1; visibility: visible; }

/* ===== 03 顶栏与面包屑 ===== */
.main {
  position: relative;
  min-height: 100vh;
  margin-left: var(--rail-w);
}

.main::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(86, 116, 190, .10) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 14%, #000 86%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0, #000 14%, #000 86%, transparent 100%);
  opacity: .55;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .84);
  border-bottom: 1px solid transparent;
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  backdrop-filter: blur(14px) saturate(1.1);
  transition: border-color .3s ease, box-shadow .3s ease, background .3s ease;
}
.topbar.is-scrolled {
  background: rgba(255, 255, 255, .95);
  border-bottom-color: var(--line-2);
  box-shadow: 0 12px 30px -26px rgba(31, 60, 120, .6);
}

.topbar-in {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 26px;
}

.burger {
  display: none;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: #fff;
  color: var(--blue-700);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.burger svg { width: 20px; height: 20px; }

.crumb {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--ink-3);
  white-space: nowrap;
  overflow: hidden;
}
.crumb a { color: var(--ink-3); transition: color .2s ease; }
.crumb a:hover { color: var(--blue-700); }
.crumb em {
  font-style: normal;
  color: var(--blue-700);
  font-weight: 600;
}
.crumb span { color: var(--line-2); }

.topbar-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.ti {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 12.5px;
  color: var(--ink-2);
  font-family: var(--mono);
  white-space: nowrap;
}
.ti svg { width: 14px; height: 14px; color: var(--blue-600); flex: none; }
.ti-strong {
  background: linear-gradient(100deg, var(--blue-100), var(--violet-100));
  border-color: var(--line-2);
  color: var(--blue-700);
  font-weight: 700;
}

.page { position: relative; z-index: 1; }

/* ===== 04 首屏五种骨架 ===== */
.hero { padding: 30px 0 6px; }
.hero--compact { padding: 20px 0 0; }

/* 首页全屏首屏 */
.hero--home {
  display: flex;
  align-items: center;
  min-height: calc(100vh - 64px);
  padding-top: clamp(26px, 4vw, 56px);
  padding-bottom: clamp(26px, 4vw, 56px);
}
.hero--home .hero-in { width: 100%; }
@media (max-width: 1080px) {
  .hero--home { min-height: calc(100vh - 60px); }
}
@media (max-width: 900px) {
  .hero--home { min-height: auto; }
}

.hero-in {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 26px;
}

.hero-copy { max-width: 660px; }

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 10px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, .8);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--blue-700);
  font-weight: 600;
}
.hero-kicker i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--blue-500), var(--violet-600));
}

.hero-title {
  margin-top: 18px;
  font-size: clamp(30px, 4.1vw, 54px);
  line-height: 1.16;
  letter-spacing: -1px;
}
.hero--compact .hero-title { font-size: clamp(26px, 3vw, 40px); letter-spacing: -.6px; }

.hero-title em {
  font-style: normal;
  background: linear-gradient(100deg, var(--blue-700) 8%, var(--violet-600) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 610px;
  margin-top: 18px;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.hero-contact a,
.hero-contact span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: #fff;
  font-size: 13.5px;
  font-family: var(--mono);
  color: var(--ink-2);
  box-shadow: var(--shadow-s);
}
.hero-contact a:hover { border-color: var(--blue-300); color: var(--blue-700); }
.hero-contact b { color: var(--blue-700); }
.hero-contact svg { width: 15px; height: 15px; color: var(--violet-600); }

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.hero-media { position: relative; }

.hero-figure {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-2);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow-l);
}
.hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-seal {
  position: absolute;
  left: -12px;
  bottom: 26px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  background: rgba(255, 255, 255, .96);
  box-shadow: var(--shadow-m);
  transform: rotate(-2deg);
}
.hero-seal b {
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1;
  color: var(--blue-700);
}
.hero-seal span {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-3);
}

.hero-stats {
  position: absolute;
  top: 20px;
  right: 16px;
  display: grid;
  gap: 8px;
}
.hero-stat {
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .93);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-s);
  text-align: right;
}
.hero-stat b {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1.1;
  color: var(--blue-700);
}
.hero-stat span {
  font-size: 11.5px;
  color: var(--ink-3);
}

.hero-note {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 3px solid var(--blue-300);
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--ink-3);
}

/* 骨架 A：左右分栏 + 悬浮牌 */
.hero--split .hero-in {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
}
.hero--split .hero-figure { aspect-ratio: 4 / 3.4; }

/* 骨架 B：堆叠式 */
.hero--stack .hero-in { display: block; }
.hero--stack .hero-copy { max-width: 840px; }
.hero--stack .hero-title { font-size: clamp(34px, 5vw, 60px); }
.hero-plates {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.hero-plate {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.hero-plate:nth-child(2) { transform: translateY(16px); }
.hero-plate:nth-child(3) { transform: translateY(32px); }
.hero-plate b {
  display: block;
  font-family: var(--mono);
  font-size: 20px;
  color: var(--violet-700);
}
.hero-plate span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-3);
}
.hero--stack .hero-media { margin-top: 38px; }
.hero--stack .hero-figure { aspect-ratio: 16 / 6.4; }

/* 骨架 C：舞台式 */
.hero--stage .hero-in { display: grid; }
.hero--stage .hero-copy {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-2);
  border-radius: 24px;
  background: rgba(255, 255, 255, .9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-l);
}
.hero--stage .hero-media {
  z-index: 1;
  margin-top: -54px;
  margin-left: 10%;
}
.hero--stage .hero-figure { aspect-ratio: 16 / 7; }

/* 骨架 D：账册式 */
.hero--board .hero-in {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr) 300px;
  gap: 26px;
  align-items: start;
}
.hero-index {
  display: grid;
  gap: 8px;
  padding: 14px 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.hero-index span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-3);
  padding: 5px 6px;
  border-bottom: 1px dashed var(--line);
  text-align: right;
}
.hero-index span:last-child { border-bottom: 0; }
.hero-index span:first-child { color: var(--blue-700); font-weight: 700; }
.hero--board .hero-copy { max-width: none; }
.hero-rows { display: grid; gap: 10px; }
.hero-row {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  font-size: 13px;
  line-height: 1.65;
  box-shadow: var(--shadow-s);
}
.hero-row b {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--blue-600);
  letter-spacing: .04em;
}
.hero-row span { color: var(--ink-2); }

/* 骨架 E：马赛克式 */
.hero--mosaic .hero-in {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}
.hero-mosaic {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
  height: clamp(320px, 38vw, 460px);
}
.hero-tile {
  overflow: hidden;
  border: 1px solid var(--line-2);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.hero-tile--lg { grid-row: span 2; border-radius: 20px; box-shadow: var(--shadow-m); }
.hero-tile img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 05 通用区块与标题 ===== */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 26px;
}
.wrap-narrow {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 26px;
}
.wrap-wide {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 26px;
}

.sec { padding: clamp(44px, 6vw, 74px) 0; }
.sec--tight { padding: clamp(28px, 3.6vw, 44px) 0; }

.sec--tint {
  background:
    linear-gradient(180deg, rgba(231, 240, 254, .62), rgba(255, 255, 255, 0) 86%),
    linear-gradient(180deg, rgba(255, 255, 255, 0) 14%, rgba(248, 245, 255, .5) 100%);
}
.sec--violet {
  background:
    linear-gradient(180deg, rgba(239, 233, 254, .66), rgba(255, 255, 255, 0) 88%);
}
.sec--deep {
  background: linear-gradient(118deg, #1e2b4f 0%, #2a2350 58%, #312a5c 100%);
  color: #e9f0ff;
  border-radius: 26px;
}
.sec--deep .h2,
.sec--deep h3 { color: #fff; }
.sec--deep .lede { color: #b9c6e4; }
.sec--deep .kicker { color: #a9c8f8; }
.sec--deep .sec-head { color: #e9f0ff; }

.sec-head { max-width: 780px; margin-bottom: clamp(24px, 3.2vw, 40px); }
.sec-head--row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  max-width: none;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue-700);
}
.kicker::before {
  content: "";
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-600), var(--violet-600));
}

.h2 {
  margin-top: 10px;
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.32;
}
.h3 {
  font-size: clamp(19px, 1.7vw, 24px);
  line-height: 1.45;
}
.h4 { font-size: 18px; line-height: 1.5; }

.lede {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-2);
}

.rule {
  max-width: 220px;
  height: 1px;
  margin: 18px 0 0;
  background: linear-gradient(90deg, var(--blue-300), rgba(201, 184, 245, .5), transparent);
}
.rule--full { max-width: none; }

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--line-2), transparent);
}

/* ===== 06 卡片体系 ===== */
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g-split { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); align-items: center; }
.g-side { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
.span-2 { grid-column: span 2; }

.pcard {
  position: relative;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-s);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.pcard:hover {
  transform: translateY(-5px);
  border-color: var(--blue-200);
  box-shadow: var(--shadow-m);
}
.pcard-num {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--blue-600);
}
.pcard-title { margin: 9px 0 8px; font-size: 18.5px; line-height: 1.5; }
.pcard-text { font-size: 14px; line-height: 1.95; color: var(--ink-3); }
.pcard-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px dashed var(--line-2);
  font-size: 12.5px;
  color: var(--ink-3);
}
.pcard-foot a { color: var(--blue-700); font-weight: 600; }

.icard {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-s);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.icard:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); border-color: var(--blue-200); }
.icard-ic {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-2);
  border-radius: 13px;
  background: linear-gradient(140deg, var(--blue-100), var(--violet-100));
  color: var(--blue-700);
}
.icard-ic svg { width: 22px; height: 22px; }
.icard-title { margin-top: 15px; font-size: 17.5px; line-height: 1.5; }
.icard-text { margin-top: 7px; font-size: 13.5px; line-height: 1.9; color: var(--ink-3); }

.mcard {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-s);
  transition: transform .35s ease, box-shadow .35s ease;
}
.mcard:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); }
.mcard-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--blue-50);
}
.mcard-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .65s ease;
}
.mcard:hover .mcard-img img { transform: scale(1.045); }
.mcard-body { padding: 20px 22px 22px; }
.mcard-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--blue-600);
}
.mcard-title { margin-top: 8px; font-size: 17px; line-height: 1.55; }
.mcard-text { margin-top: 7px; font-size: 13.5px; line-height: 1.9; color: var(--ink-3); }

.scard {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue-300);
  border-radius: 4px var(--r-md) var(--r-md) 4px;
  background: #fff;
  box-shadow: var(--shadow-s);
  transition: border-color .3s ease, transform .3s ease;
}
.scard:hover { border-left-color: var(--violet-600); transform: translateX(3px); }

.qcard {
  padding: 24px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-lg);
  background: linear-gradient(152deg, #ffffff 0%, var(--blue-50) 100%);
}
.qcard-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
}
.qcard-head i {
  width: 26px;
  height: 26px;
  border-radius: 9px;
  background: linear-gradient(140deg, var(--blue-200), var(--violet-200));
  display: grid;
  place-items: center;
}
.qcard-head i svg { width: 14px; height: 14px; color: var(--violet-700); }
.qcard-body { margin-top: 9px; font-size: 13.5px; line-height: 1.9; color: var(--ink-2); }

.kcard {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  text-align: center;
  box-shadow: var(--shadow-s);
}
.kcard-val {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--blue-700);
}
.kcard-lab { margin-top: 4px; font-size: 12.5px; color: var(--ink-3); }

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.stat { padding: 22px 20px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat-num {
  font-family: var(--mono);
  font-size: 27px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--blue-700);
}
.stat-lab { margin-top: 4px; font-size: 12.5px; color: var(--ink-3); }

/* 阶梯式卡片排布：三列错位 */
.stair {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  align-items: start;
}
.stair > *:nth-child(3n + 2) { transform: translateY(22px); }
.stair > *:nth-child(3n + 3) { transform: translateY(44px); }

/* ===== 07 步骤、阶梯、表格 ===== */
.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.flow-step {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.flow-no {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--violet-600);
  opacity: .85;
}
.flow-title { margin-top: 10px; font-size: 16px; line-height: 1.5; }
.flow-text { margin-top: 6px; font-size: 13px; line-height: 1.85; color: var(--ink-3); }

.flow--v {
  grid-template-columns: 1fr;
  gap: 0;
  border-left: 2px solid var(--line-2);
  padding-left: 22px;
}
.flow--v .flow-step {
  border: 0;
  border-radius: 0;
  border-bottom: 1px dashed var(--line-2);
  background: transparent;
  box-shadow: none;
  padding: 16px 0;
}
.flow--v .flow-step:last-child { border-bottom: 0; }
.flow--v .flow-no { font-size: 15px; }

.ladder { display: grid; gap: 14px; }
.ladder-item {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 16px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  box-shadow: var(--shadow-s);
}
.ladder-item:nth-child(2) { margin-left: 26px; }
.ladder-item:nth-child(3) { margin-left: 52px; }
.ladder-item:nth-child(4) { margin-left: 78px; }
.ladder-item:nth-child(5) { margin-left: 104px; }
.ladder-no {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--blue-600);
  align-self: center;
}
.ladder-body { font-size: 14px; line-height: 1.9; color: var(--ink-2); }
.ladder-body b { color: var(--ink); }

.tbl-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.tbl {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 13.5px;
}
.tbl caption {
  caption-side: top;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-3);
  text-align: left;
}
.tbl th {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-2);
  background: var(--blue-50);
  font-weight: 600;
  color: var(--blue-700);
  text-align: left;
  white-space: nowrap;
}
.tbl td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  vertical-align: top;
}
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl--zebra tbody tr:nth-child(even) td { background: #fafcff; }
.tbl td b { color: var(--ink); }

/* ===== 08 图文、标签、说明块 ===== */
.media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-s);
}
.media img { display: block; width: 100%; height: auto; object-fit: cover; }
.media figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-3);
}

.figrow {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}
.figrow--rev .figrow-media { order: 2; }
.figrow-media { position: relative; }
.figrow-media img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-m);
  object-fit: cover;
}
.figrow-copy .kicker { margin-bottom: 4px; }
.figrow-copy p { margin-top: 14px; font-size: 14.5px; line-height: 1.95; color: var(--ink-2); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--blue-100);
  font-size: 12.5px;
  color: var(--blue-700);
  white-space: nowrap;
}
.tag--violet { background: var(--violet-100); color: var(--violet-700); border-color: var(--violet-200); }
.tag--plain { background: #fff; color: var(--ink-2); }

.pill-list { display: flex; flex-wrap: wrap; gap: 10px; }

.check-list { list-style: none; display: grid; gap: 9px; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-2);
}
.check-list svg { width: 15px; height: 15px; margin-top: 4px; color: var(--blue-600); flex: none; }

.kv {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 9px 16px;
}
.kv dt { font-size: 13px; color: var(--ink-3); }
.kv dd { margin: 0; font-size: 13.5px; color: var(--ink); }

.note {
  padding: 16px 18px;
  border: 1px solid var(--line-2);
  border-left: 4px solid var(--blue-300);
  border-radius: 12px;
  background: var(--blue-50);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--ink-2);
}
.note--warn {
  border-color: #f3e2ca;
  border-left-color: #d9a65e;
  background: #fff9f1;
}
.note--quote {
  border-color: var(--violet-200);
  border-left-color: var(--violet-300);
  background: var(--violet-50);
}

.quote {
  padding: 26px 30px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.quote-mark {
  font-family: Georgia, "Songti SC", serif;
  font-size: 42px;
  font-weight: 700;
  line-height: .8;
  color: var(--violet-300);
}
.quote p { margin-top: 8px; font-size: 15px; line-height: 1.95; color: var(--ink-2); }
.quote-sig { margin-top: 14px; font-size: 12.5px; color: var(--ink-3); }

.panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-s);
}
.panel-head {
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, var(--blue-50), var(--violet-50));
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}
.panel-body { padding: 22px; }

/* ===== 09 联系、CTA、表单 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
}
.btn svg { width: 16px; height: 16px; }
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: linear-gradient(100deg, var(--blue-600), var(--violet-600));
  color: #fff;
  box-shadow: 0 14px 26px -16px rgba(64, 84, 190, .85);
}
.btn--primary:hover { box-shadow: 0 18px 30px -14px rgba(64, 84, 190, .9); }
.btn--ghost {
  background: #fff;
  border-color: var(--line-2);
  color: var(--ink-2);
}
.btn--ghost:hover { border-color: var(--blue-300); color: var(--blue-700); }
.btn--line {
  background: transparent;
  border-color: var(--blue-300);
  color: var(--blue-700);
}
.btn--line:hover { background: var(--blue-50); }
.btn--sm { padding: 8px 15px; font-size: 13px; border-radius: 10px; }

.contact-band {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: 30px;
  align-items: center;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-2);
  border-radius: 22px;
  background: linear-gradient(122deg, #eaf3ff 0%, #f3ecff 100%);
}
.contact-band::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -90px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 184, 245, .55), transparent 68%);
  pointer-events: none;
}
.cb-copy { position: relative; z-index: 1; }
.cb-copy .h3 { font-size: clamp(20px, 2vw, 26px); }
.cb-copy p { margin-top: 10px; font-size: 14px; line-height: 1.9; color: var(--ink-2); }
.cb-info { position: relative; z-index: 1; display: grid; gap: 12px; }
.cb-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.cb-item svg { width: 18px; height: 18px; color: var(--violet-600); flex: none; }
.cb-item small { display: block; font-size: 11.5px; color: var(--ink-3); }
.cb-item b {
  display: block;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--blue-700);
  word-break: break-all;
}

.contact-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-m);
}
.cc-head { font-size: 17px; font-weight: 700; }
.cc-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; font-size: 14px; }
.cc-row span { color: var(--ink-3); font-size: 12.5px; }
.cc-row b { font-family: var(--mono); color: var(--blue-700); }

.cta {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 52px);
  border-radius: 24px;
  background: linear-gradient(116deg, #21305a 0%, #2b2352 62%, #352c63 100%);
  color: #eef3ff;
  box-shadow: var(--shadow-l);
}
.cta::before {
  content: "";
  position: absolute;
  left: -40px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(120, 152, 240, .30), transparent 70%);
}
.cta-in {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}
.cta-title { font-size: clamp(21px, 2.4vw, 30px); line-height: 1.4; color: #fff; }
.cta-text { margin-top: 8px; font-size: 13.5px; line-height: 1.85; color: #b9c6e4; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta .btn--ghost { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .28); color: #fff; }
.cta .btn--ghost:hover { background: rgba(255, 255, 255, .18); }

.form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 6px; }
.field label { font-size: 12.5px; color: var(--ink-3); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: #fff;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 0;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(74, 127, 227, .16);
}
.field textarea { min-height: 104px; resize: vertical; }
.form-note { font-size: 12px; line-height: 1.8; color: var(--ink-3); }

.faq { display: grid; gap: 12px; }
.faq-item {
  padding: 4px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 0;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  width: 22px;
  height: 22px;
  flex: none;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 20px;
  text-align: center;
  color: var(--blue-700);
  transition: transform .25s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-a {
  padding: 0 0 16px;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--ink-2);
}

.side-links {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.sl-title { margin-bottom: 8px; font-size: 13.5px; font-weight: 700; color: var(--ink); }
.sl-list { display: grid; }
.sl-list a {
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
  color: var(--ink-2);
  transition: color .2s ease, padding .2s ease;
}
.sl-list a:last-child { border-bottom: 0; }
.sl-list a:hover { color: var(--blue-700); padding-left: 4px; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--violet-100);
  font-size: 11.5px;
  color: var(--violet-700);
  letter-spacing: .04em;
}
.badge--blue { background: var(--blue-100); color: var(--blue-700); }

/* ===== 10 资讯模块 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.news-lead { grid-column: span 2; }

.news-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-s);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.news-item:hover { transform: translateY(-4px); border-color: var(--blue-200); box-shadow: var(--shadow-m); }
.news-date {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--blue-600);
}
.news-title { font-size: 15.5px; line-height: 1.6; color: var(--ink); }
.news-text { font-size: 13px; line-height: 1.85; color: var(--ink-3); }

.news-side { display: grid; gap: 10px; align-content: start; }
.news-mini {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-s);
}
.news-mini a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 11px 14px;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
  color: var(--ink-2);
  transition: background .2s ease, color .2s ease;
}
.news-mini a:last-child { border-bottom: 0; }
.news-mini a:hover { background: var(--blue-50); color: var(--blue-700); }
.news-mini em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}
.news-mini b { font-weight: 500; line-height: 1.55; }
.news-mini--thumb a { grid-template-columns: 64px auto 1fr; align-items: center; }
.nm-thumb {
  width: 64px;
  height: auto;
  aspect-ratio: 3 / 2;
  display: block;
  object-fit: cover;
  border-radius: 7px;
  background: var(--blue-50);
}

.news-row {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-s);
  transition: border-color .25s ease, transform .25s ease;
}
.news-row:hover { border-color: var(--blue-200); transform: translateX(3px); }
.news-row time {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--blue-600);
}
.news-row p { font-size: 14.5px; line-height: 1.65; color: var(--ink); }
.news-row span { font-size: 12px; color: var(--ink-3); }

/* 文章正文 */
.article {
  padding: clamp(24px, 3vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-s);
}
.article h1 { font-size: clamp(24px, 3vw, 34px); line-height: 1.42; }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-3);
}
.article-figure { margin: 22px 0 24px; }
.article-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.article-body p { margin-top: 16px; font-size: 14.5px; line-height: 2.05; color: var(--ink-2); }
.article-body h2 { margin-top: 30px; font-size: 21px; line-height: 1.5; }
.article-body h3 { margin-top: 22px; font-size: 18px; line-height: 1.5; }
.article-body ul { margin-top: 14px; padding-left: 20px; color: var(--ink-2); }
.article-body li { font-size: 14px; line-height: 1.95; }

/* ===== 11 页脚、返回顶部 ===== */
.foot {
  margin-top: clamp(36px, 5vw, 64px);
  background: linear-gradient(158deg, #1c2746 0%, #241f44 58%, #2a2350 100%);
  color: #d9e2f6;
}
.foot-in {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1fr 1fr;
  gap: 30px;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(34px, 5vw, 54px) 26px 24px;
}
.foot-brand { display: flex; align-items: center; gap: 11px; }
.foot-brand img {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, .2);
  background: #fff;
  object-fit: cover;
}
.foot-brand b { display: block; font-size: 15.5px; color: #fff; }
.foot-brand em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  font-size: 11px;
  letter-spacing: .1em;
  color: #93a3c8;
}
.foot-desc { margin-top: 14px; font-size: 12.5px; line-height: 1.9; color: #9dabd0; }
.foot-contact { margin-top: 16px; display: grid; gap: 6px; font-size: 12.5px; }
.foot-contact a { color: #cfdbf6; font-family: var(--mono); }
.foot-contact span { color: #93a3c8; }
.foot-col-title {
  margin-bottom: 12px;
  font-size: 12.5px;
  letter-spacing: .12em;
  color: #fff;
}
.foot-nav { display: grid; gap: 8px; }
.foot-nav a { font-size: 12.5px; color: #9dabd0; transition: color .2s ease; }
.foot-nav a:hover { color: #fff; }
.foot-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 26px 24px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: 12px;
  color: #8b9ac0;
}
.foot-bottom a { color: #8b9ac0; }
.foot-bottom a:hover { color: #cfdbf6; }
.foot-icp { color: #8b9ac0; }

.backtop {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 60;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: rgba(255, 255, 255, .94);
  color: var(--blue-700);
  cursor: pointer;
  box-shadow: var(--shadow-m);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s ease, visibility .3s ease, transform .3s ease;
}
.backtop.is-show { opacity: 1; visibility: visible; transform: none; }
.backtop svg { width: 18px; height: 18px; }

/* ===== 12 动画、响应式 ===== */
.js .reveal,
.js .reveal-l,
.js .reveal-r,
.js .reveal-s {
  opacity: 0;
  transition: opacity .72s cubic-bezier(.22, .7, .2, 1), transform .72s cubic-bezier(.22, .7, .2, 1);
  will-change: opacity, transform;
}
.js .reveal { transform: translateY(26px); }
.js .reveal-l { transform: translateX(-26px); }
.js .reveal-r { transform: translateX(26px); }
.js .reveal-s { transform: scale(.965); }
.js .reveal.is-in,
.js .reveal-l.is-in,
.js .reveal-r.is-in,
.js .reveal-s.is-in { opacity: 1; transform: none; }

.d1 { transition-delay: .08s; }
.d2 { transition-delay: .16s; }
.d3 { transition-delay: .24s; }
.d4 { transition-delay: .32s; }
.d5 { transition-delay: .40s; }

.page { animation: pageIn .55s cubic-bezier(.22, .7, .2, 1) both; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.fade-seq > * { animation: fadeUp .7s cubic-bezier(.22, .7, .2, 1) both; }
.fade-seq > *:nth-child(2) { animation-delay: .08s; }
.fade-seq > *:nth-child(3) { animation-delay: .16s; }
.fade-seq > *:nth-child(4) { animation-delay: .24s; }
.fade-seq > *:nth-child(5) { animation-delay: .32s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

/* 通用间距工具 */
.mt-s { margin-top: 12px; }
.mt-m { margin-top: 24px; }
.mt-l { margin-top: 36px; }
.mt-xl { margin-top: 52px; }
.txt-c { text-align: center; }
.maxw { max-width: 720px; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* 平板与移动端 */
@media (max-width: 1180px) {
  html { --rail-w: 228px; }
  .foot-in { grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 22px; }
}

@media (max-width: 1080px) {
  .rail { transform: translateX(-104%); transition: transform .34s cubic-bezier(.22, .7, .2, 1); box-shadow: 18px 0 60px -30px rgba(20, 30, 60, .5); }
  .rail.is-open { transform: none; }
  .rail-close { display: flex; }
  .rail-mask { display: block; }
  .main { margin-left: 0; }
  .burger { display: inline-flex; }
  .topbar-info .ti:first-child { display: none; }
  .hero--board .hero-in { grid-template-columns: 84px minmax(0, 1fr); }
  .hero--board .hero-rows { display: none; }
}

@media (max-width: 900px) {
  .hero--split .hero-in,
  .hero--mosaic .hero-in { grid-template-columns: 1fr; gap: 26px; }
  .hero--split .hero-figure { aspect-ratio: 16 / 9; }
  .hero-mosaic { height: 320px; }
  .hero--stage .hero-media { margin-top: -34px; margin-left: 0; }
  .hero--board .hero-in { grid-template-columns: 1fr; }
  .hero-index { grid-template-columns: repeat(4, 1fr); }
  .hero-index span { text-align: left; border-bottom: 0; }
  .hero-index span:nth-child(4) { display: none; }
  .hero-plates { grid-template-columns: 1fr; }
  .hero-plate:nth-child(2),
  .hero-plate:nth-child(3) { transform: none; }
  .hero-stats { position: static; display: flex; margin-top: 12px; }
  .hero-seal { position: static; display: inline-flex; margin-top: 12px; transform: none; }

  .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g-split,
  .g-side { grid-template-columns: 1fr; }
  .figrow { grid-template-columns: 1fr; gap: 24px; }
  .figrow--rev .figrow-media { order: 0; }
  .stair { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stair > *:nth-child(3n + 2),
  .stair > *:nth-child(3n + 3) { transform: none; }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .news-lead { grid-column: span 2; }
  .contact-band { grid-template-columns: 1fr; gap: 22px; }
  .foot-in { grid-template-columns: 1fr 1fr; }
  .sitemap-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  body { font-size: 14.5px; }
  .topbar-in { padding: 10px 16px; gap: 10px; }
  .topbar-info .ti { padding: 5px 10px; font-size: 11.5px; }
  .crumb { display: none; }
  .wrap,
  .wrap-narrow,
  .wrap-wide,
  .hero-in { padding-left: 16px; padding-right: 16px; }
  .hero { padding-top: 18px; }
  .hero-title { font-size: 28px; letter-spacing: -.4px; }
  .hero-sub { font-size: 14.5px; line-height: 1.9; }
  .hero-actions .btn { width: 100%; }
  .hero-contact { display: grid; }
  .hero-contact a,
  .hero-contact span { justify-content: space-between; }
  .hero-seal { display: flex; width: 100%; }
  .hero-mosaic { height: 260px; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
  .hero-tile--lg { grid-row: span 1; }
  .hero-tile:nth-child(2) { display: none; }

  .g2,
  .g3,
  .g4,
  .stair,
  .flow,
  .news-grid { grid-template-columns: 1fr; }
  .news-lead { grid-column: span 1; }
  .span-2 { grid-column: span 1; }
  .form-row { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: 1fr 1fr; }
  .ladder-item { grid-template-columns: 1fr; gap: 6px; }
  .ladder-item:nth-child(2),
  .ladder-item:nth-child(3),
  .ladder-item:nth-child(4),
  .ladder-item:nth-child(5) { margin-left: 0; }
  .news-row { grid-template-columns: 1fr; gap: 6px; }
  .news-row span { display: none; }
  .kv { grid-template-columns: 1fr; gap: 2px 0; }
  .kv dd { margin-bottom: 8px; }
  .foot-in { grid-template-columns: 1fr; gap: 22px; }
  .foot-bottom { flex-direction: column; align-items: flex-start; }
  .sitemap-grid { grid-template-columns: 1fr; }
  .cta { border-radius: 18px; }
  .cta .btn { width: 100%; }
  .backtop { right: 14px; bottom: 16px; }
  .quote { padding: 20px 22px; }
  .sec--deep { border-radius: 18px; }
  .tbl { min-width: 560px; font-size: 13px; }
  .tbl th,
  .tbl td { padding: 10px 12px; }
}

@media (max-width: 380px) {
  .hero-title { font-size: 24px; }
  .stat-strip { grid-template-columns: 1fr; }
  .stat { border-right: 0; }
}

/* 减少动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal,
  .js .reveal-l,
  .js .reveal-r,
  .js .reveal-s { opacity: 1; transform: none; }
}