/* =========================================================
   捷瀚信息科技有限公司 官网 · 全局样式
   设计基调：简约科技蓝 / PC端 ToB 企业官网
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --blue-700: #1442ad;
  --blue-600: #1a56db;
  --blue-500: #2563eb;
  --blue-400: #3b82f6;
  --cyan: #00b4ff;
  --navy: #071634;
  --navy-2: #0f2a5c;

  --ink: #0f172a;
  --text: #374151;
  --muted: #6b7280;
  --line: #e6ebf4;
  --bg: #ffffff;
  --bg-soft: #f5f8ff;
  --bg-soft-2: #eef4ff;

  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;

  --shadow-xs: 0 2px 8px rgba(15, 42, 92, .06);
  --shadow: 0 10px 30px rgba(15, 42, 92, .08);
  --shadow-lg: 0 24px 60px rgba(15, 42, 92, .14);
  --shadow-blue: 0 12px 28px rgba(37, 99, 235, .28);

  --maxw: 1200px;
  --header-h: 78px;
  --ease: cubic-bezier(.22, .68, .32, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, "Hiragino Sans GB", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .3px;
}

p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration: none;
  transition: color .25s var(--ease);
}

ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

svg { display: block; }
.icon { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 28px; height: 28px; }

::selection { background: rgba(37, 99, 235, .18); }

/* ---------- 3. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow { max-width: 960px; }

.section { padding: 96px 0; position: relative; }
.section-sm { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-soft-2 { background: var(--bg-soft-2); }
.section-navy { background: var(--navy); color: rgba(255, 255, 255, .78); }
.section-navy h2, .section-navy h3 { color: #fff; }

/* ---------- 4. 区块标题 ---------- */
.section-head { margin-bottom: 52px; max-width: 760px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--blue-600);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan));
  border-radius: 2px;
}
.section-head.center .eyebrow::after {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue-600));
  border-radius: 2px;
}

.section-head h2 { font-size: 34px; margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 16px; }
.section-navy .section-head p { color: rgba(255, 255, 255, .68); }
.section-navy .eyebrow { color: #6ee7ff; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all .28s var(--ease);
  background: none;
}
.btn .icon { width: 18px; height: 18px; transition: transform .28s var(--ease); }
.btn:hover .icon { transform: translateX(3px); }

.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(37, 99, 235, .36); color: #fff; }

.btn-white { background: #fff; color: var(--blue-700); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(0, 0, 0, .18); color: var(--blue-700); }

.btn-outline { border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn-outline:hover { background: rgba(255, 255, 255, .12); border-color: #fff; color: #fff; }

.btn-ghost { border-color: var(--line); color: var(--blue-700); background: #fff; }
.btn-ghost:hover { border-color: var(--blue-500); color: var(--blue-600); transform: translateY(-2px); box-shadow: var(--shadow); }

.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; }
.btn-lg { height: 54px; padding: 0 34px; font-size: 16px; }
.btn-block { width: 100%; }

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue-600);
}
.link-more .icon { width: 16px; height: 16px; transition: transform .25s var(--ease); }
.link-more:hover { color: var(--blue-700); }
.link-more:hover .icon { transform: translateX(4px); }

/* ---------- 6. 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  color: #fff;
  transition: background .3s var(--ease), box-shadow .3s var(--ease), height .3s var(--ease);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 22, 52, .55), rgba(7, 22, 52, 0));
  opacity: 1;
  transition: opacity .3s var(--ease);
  pointer-events: none;
}
.site-header.is-solid {
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(12px);
  box-shadow: 0 4px 20px rgba(15, 42, 92, .08);
  color: var(--ink);
  height: 68px;
}
.site-header.is-solid::before { opacity: 0; }
.site-header.is-solid .logo-text strong { color: var(--ink); }
.site-header.is-solid .logo-text em { color: var(--muted); }
.site-header.is-solid .nav a { color: var(--text); }
.site-header.is-solid .nav a:hover,
.site-header.is-solid .nav a.is-active { color: var(--blue-600); }
.site-header.is-solid .nav a.is-active::after { opacity: 1; }
.site-header.is-solid .logo-mark { box-shadow: 0 6px 16px rgba(37, 99, 235, .32); }

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: block;
  object-fit: cover;
  box-shadow: 0 6px 16px rgba(0, 120, 255, .32);
  transition: box-shadow .3s var(--ease);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-text strong { font-size: 17px; color: #fff; letter-spacing: .5px; white-space: nowrap; transition: color .3s var(--ease); }
.logo-text em { font-style: normal; font-size: 10.5px; color: rgba(255, 255, 255, .66); letter-spacing: 0; white-space: nowrap; transition: color .3s var(--ease); }

.nav { display: flex; align-items: center; gap: 2px; margin-right: auto; flex-shrink: 0; }
.nav a {
  position: relative;
  display: block;
  padding: 10px;
  font-size: 15px;
  color: rgba(255, 255, 255, .9);
  border-radius: 8px;
  white-space: nowrap;
}
.nav a:hover { color: #fff; }
.nav a::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan));
  opacity: 0;
  transition: opacity .25s var(--ease);
}
.nav a:hover::after { opacity: .7; }
.nav a.is-active { color: #fff; font-weight: 600; }
.nav a.is-active::after { opacity: 1; }

.nav-item { position: relative; }
.nav-item > a { display: flex; align-items: center; gap: 5px; }
.nav-item > a .caret { width: 12px; height: 12px; transition: transform .25s var(--ease); }
.nav-drop {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translate(-50%, 10px);
  width: 268px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all .26s var(--ease);
}
.nav-item:hover .nav-drop { opacity: 1; visibility: visible; transform: translate(-50%, 4px); }
.nav-item:hover > a .caret { transform: rotate(180deg); }
.nav-drop a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text);
}
.nav-drop a::after { display: none; }
.nav-drop a:hover { background: var(--bg-soft); color: var(--blue-600); }
.nav-drop a .icon { color: var(--blue-500); margin-top: 3px; flex-shrink: 0; }
.nav-drop a b { display: block; font-size: 14px; color: var(--ink); }
.nav-drop a span { font-size: 12px; color: var(--muted); line-height: 1.5; }
.nav-drop a:hover b { color: var(--blue-600); }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-phone { display: flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 700; white-space: nowrap; }
.header-phone .icon { width: 18px; height: 18px; color: var(--cyan); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, .3);
  background: transparent;
  border-radius: 10px;
  cursor: pointer;
  padding: 11px 10px;
}
.nav-toggle span { display: block; height: 2px; background: currentColor; border-radius: 2px; }
.nav-toggle span + span { margin-top: 5px; }

/* ---------- 7. 首屏 ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 84px;
  background: var(--navy);
  overflow: hidden;
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 520px at 78% 12%, rgba(0, 180, 255, .30), transparent 62%),
    radial-gradient(760px 480px at 12% 82%, rgba(37, 99, 235, .34), transparent 60%),
    linear-gradient(160deg, #071634 0%, #0d2a5e 46%, #0a1e46 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 35%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, #000 30%, transparent 78%);
}
.hero .container { position: relative; z-index: 2; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .18);
  font-size: 13px;
  color: rgba(255, 255, 255, .88);
  margin-bottom: 26px;
}
.hero-badge b {
  padding: 2px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--blue-400), var(--cyan));
  font-size: 12px;
  color: #fff;
}

.hero h1 {
  font-size: 50px;
  line-height: 1.22;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: .5px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #7dd3fc, #38bdf8 40%, #a5b4fc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { font-size: 19px; color: rgba(255, 255, 255, .9); margin-bottom: 10px; }
.hero-desc { font-size: 15px; color: rgba(255, 255, 255, .68); margin-bottom: 34px; max-width: 560px; }
.hero-desc b { color: #7dd3fc; font-weight: 600; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats {
  display: flex;
  gap: 44px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}
.hero-stats li strong {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.hero-stats li strong i { font-style: normal; font-size: 18px; margin-left: 2px; }
.hero-stats li span { font-size: 13px; color: rgba(255, 255, 255, .6); }

/* 首屏视觉：栅格布局，元素之间不重叠 */
.hero-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 22px;
  align-content: start;
}

.hero-panel {
  grid-column: 1 / -1;
  padding: 18px 22px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  backdrop-filter: blur(10px);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .32);
}
.hero-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  font-size: 13px;
  color: rgba(255, 255, 255, .8);
}
.hero-panel-head .dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #34d399; margin-right: 6px; }
.hero-panel-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.hero-panel-metrics div {
  padding: 11px 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .07);
  text-align: center;
}
.hero-panel-metrics strong { display: block; font-size: 18px; color: #fff; line-height: 1.3; }
.hero-panel-metrics span { font-size: 12px; color: rgba(255, 255, 255, .6); }

.phone {
  position: relative;
  width: 100%;
  max-width: 206px;
  height: 384px;
  margin: 0 auto;
  padding: 9px;
  border-radius: 32px;
  background: linear-gradient(160deg, #1e293b, #0f172a);
  box-shadow: 0 26px 60px rgba(0, 0, 0, .45);
  border: 1px solid rgba(255, 255, 255, .12);
  overflow: hidden;
}
.phone-b .phone-title { background: linear-gradient(135deg, #111827, #334155); }

.hero-chips { grid-column: 1 / -1; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-chips span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .2);
  font-size: 13px;
  color: rgba(255, 255, 255, .92);
}
.hero-chips .icon { width: 16px; height: 16px; color: #7dd3fc; }

.phone-screen {
  position: relative;
  height: 100%;
  border-radius: 26px;
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.phone-shot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.phone-status {
  display: flex;
  justify-content: space-between;
  padding: 8px 14px 4px;
  font-size: 10px;
  color: #334155;
  font-weight: 700;
}
.phone-title {
  margin: 0 10px 8px;
  padding: 7px 10px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue-600), var(--cyan));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}
.phone-banner {
  margin: 0 10px 8px;
  height: 74px;
  border-radius: 10px;
  background: linear-gradient(135deg, #dbeafe, #eff6ff);
  border: 1px solid #dbeafe;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 12px;
  gap: 4px;
}
.phone-banner b { font-size: 12px; color: #1e40af; }
.phone-banner span { font-size: 10px; color: #64748b; }
.phone-banner i {
  display: inline-block;
  align-self: flex-start;
  padding: 1px 7px;
  border-radius: 4px;
  background: var(--blue-600);
  color: #fff;
  font-size: 9px;
  font-style: normal;
}
.phone-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 4px 10px 10px; }
.phone-grid span { text-align: center; font-size: 9px; color: #475569; }
.phone-grid i {
  display: block;
  height: 30px;
  border-radius: 9px;
  margin-bottom: 4px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #e2e8f0;
}
.phone-list { padding: 0 10px 10px; display: grid; gap: 7px; }
.phone-list div {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 9px;
  background: #f8fafc;
  border: 1px solid #eef2f7;
}
.phone-list i { width: 26px; height: 26px; border-radius: 7px; background: linear-gradient(135deg, #bfdbfe, #93c5fd); flex-shrink: 0; }
.phone-list b { font-size: 10px; color: #1e293b; display: block; }
.phone-list span { font-size: 9px; color: #94a3b8; }
.phone-tabbar {
  margin-top: auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid #eef2f7;
  padding: 7px 0 9px;
}
.phone-tabbar span { text-align: center; font-size: 9px; color: #94a3b8; }
.phone-tabbar span:first-child { color: var(--blue-600); font-weight: 700; }

.hero-wave { position: absolute; left: 0; right: 0; bottom: -1px; z-index: 2; line-height: 0; }
.hero-wave svg { width: 100%; height: 84px; }

/* ---------- 8. 产品卡 ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.p-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 34px 30px 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .32s var(--ease);
}
.p-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .38s var(--ease);
}
.p-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.p-card:hover::before { transform: scaleX(1); }

.p-card-no {
  position: absolute;
  right: 24px;
  top: 18px;
  font-size: 46px;
  font-weight: 800;
  color: rgba(37, 99, 235, .07);
  line-height: 1;
}
.icon-box {
  width: 58px;
  height: 58px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--bg-soft-2), #e0ecff);
  color: var(--blue-600);
  margin-bottom: 20px;
}
.icon-box .icon { width: 27px; height: 27px; }
.p-card h3 { font-size: 21px; margin-bottom: 8px; }
.p-card-sub { font-size: 14px; font-weight: 600; color: var(--blue-600); margin-bottom: 14px; }
.p-card-desc { font-size: 14px; color: var(--muted); line-height: 1.85; margin-bottom: 18px; }
.p-card .link-more { margin-top: auto; padding-top: 6px; }

.check-list { display: grid; gap: 9px; margin-bottom: 22px; }
.check-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: rgba(37, 99, 235, .1) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232563eb' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 9px no-repeat;
}
.check-list.check-list-light li { color: rgba(255, 255, 255, .8); }
.check-list.check-list-light li::before {
  background: rgba(255, 255, 255, .14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237dd3fc' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 9px no-repeat;
}

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tag {
  padding: 5px 12px;
  border-radius: 6px;
  background: var(--bg-soft-2);
  color: var(--blue-700);
  font-size: 12.5px;
  font-weight: 600;
}
.tag-line { background: transparent; border: 1px solid rgba(37, 99, 235, .28); }
.tag-light { background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .2); color: rgba(255, 255, 255, .88); }

/* ---------- 9. 优势 / 闭环 ---------- */
.loop-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: stretch;
  gap: 0;
  padding: 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(37, 99, 235, .16), rgba(0, 180, 255, .1));
  border: 1px solid rgba(255, 255, 255, .14);
  margin-bottom: 46px;
}
.loop-step { position: relative; padding: 8px 22px; text-align: center; }
.loop-step + .loop-step::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 28px;
  height: 1px;
  background: rgba(255, 255, 255, .28);
}
.loop-step + .loop-step::after {
  content: "";
  position: absolute;
  left: 4px;
  top: calc(50% - 3px);
  width: 6px;
  height: 6px;
  border-top: 1px solid rgba(255, 255, 255, .5);
  border-right: 1px solid rgba(255, 255, 255, .5);
  transform: rotate(45deg);
}
.loop-step i {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin: 0 auto 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .18);
  color: #7dd3fc;
}
.loop-step b { display: block; font-size: 15px; color: #fff; margin-bottom: 4px; }
.loop-step span { font-size: 12.5px; color: rgba(255, 255, 255, .6); }

.adv-card {
  padding: 28px 26px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  transition: all .3s var(--ease);
}
.adv-card:hover { background: rgba(255, 255, 255, .09); transform: translateY(-6px); border-color: rgba(0, 180, 255, .38); }
.adv-card .icon-box {
  background: rgba(0, 180, 255, .14);
  color: #7dd3fc;
  margin-bottom: 16px;
  width: 52px;
  height: 52px;
}
.adv-card h3 { font-size: 17px; margin-bottom: 10px; }
.adv-card p { font-size: 14px; color: rgba(255, 255, 255, .66); line-height: 1.85; }

/* ---------- 10. 行业方案 ---------- */
.sol-card {
  display: flex;
  flex-direction: column;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: all .32s var(--ease);
}
.sol-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.sol-card .icon-box { margin-bottom: 18px; }
.sol-card h3 { font-size: 19px; margin-bottom: 12px; }
.sol-card p { font-size: 14px; color: var(--muted); line-height: 1.85; margin-bottom: 18px; }
.sol-card-meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sol-card-meta span { font-size: 13px; color: var(--muted); }
.sol-card-meta span b { color: var(--ink); font-weight: 600; }

/* ---------- 11. 合作模式 ---------- */
.coop-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 32px 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: all .32s var(--ease);
}
.coop-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.coop-card.is-featured { border-color: rgba(37, 99, 235, .4); box-shadow: 0 12px 34px rgba(37, 99, 235, .12); }
.coop-badge {
  position: absolute;
  right: 20px;
  top: -12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}
.coop-icon {
  width: 54px;
  height: 54px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--bg-soft-2), #e0ecff);
  color: var(--blue-600);
  margin-bottom: 18px;
}
.coop-icon .icon { width: 25px; height: 25px; }
.coop-card h3 { font-size: 19px; margin-bottom: 6px; }
.coop-for { font-size: 13px; color: var(--blue-600); font-weight: 600; margin-bottom: 14px; }
.coop-card > p { font-size: 14px; color: var(--muted); line-height: 1.85; margin-bottom: 18px; }
.coop-list { display: grid; gap: 8px; margin-bottom: 22px; }
.coop-list li { position: relative; padding-left: 18px; font-size: 13.5px; color: var(--text); }
.coop-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-400);
}
.coop-card .btn { margin-top: auto; }

/* ---------- 12. 案例 ---------- */
.tabs { display: flex; justify-content: center; gap: 10px; margin-bottom: 40px; flex-wrap: wrap; }
.tab {
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: all .26s var(--ease);
}
.tab:hover { border-color: var(--blue-400); color: var(--blue-600); }
.tab.is-active {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-blue);
}

.case-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .32s var(--ease);
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.case-shot {
  position: relative;
  height: 186px;
  padding: 16px;
  background: linear-gradient(135deg, #0f2a5c, #1647a8 55%, #0ea5e9);
  overflow: hidden;
}
.case-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .07) 1px, transparent 1px);
  background-size: 22px 22px;
}
.case-shot-inner { position: relative; z-index: 2; height: 100%; }
.case-shot-bar { display: flex; align-items: center; gap: 6px; margin-bottom: 12px; }
.case-shot-bar i { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .45); }
.case-shot-bar i:first-child { background: #f87171; }
.case-shot-card {
  height: 46px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .2);
  margin-bottom: 10px;
}
.case-shot-rows { display: grid; gap: 8px; }
.case-shot-rows span { display: block; height: 10px; border-radius: 5px; background: rgba(255, 255, 255, .16); }
.case-shot-rows span:nth-child(1) { width: 76%; }
.case-shot-rows span:nth-child(2) { width: 58%; }
.case-shot-rows span:nth-child(3) { width: 68%; }
.case-shot-tag {
  position: absolute;
  right: 16px;
  bottom: 16px;
  z-index: 3;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .92);
  color: var(--blue-700);
  font-size: 12px;
  font-weight: 700;
}

.case-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 18px; margin-bottom: 6px; }
.case-industry { font-size: 13px; color: var(--blue-600); font-weight: 600; margin-bottom: 16px; }
.case-block { margin-bottom: 14px; }
.case-block b {
  display: block;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 4px;
}
.case-block p { font-size: 13.5px; color: var(--text); line-height: 1.8; }
.case-result {
  margin-top: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 14px 0 0;
  border-top: 1px dashed var(--line);
}
.case-result div { text-align: center; }
.case-result strong { display: block; font-size: 19px; color: var(--blue-600); line-height: 1.3; }
.case-result strong i { font-style: normal; font-size: 12px; }
.case-result span { font-size: 12px; color: var(--muted); }

.shot-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; height: calc(100% - 26px); }
.shot-frame {
  border-radius: 9px;
  padding: 9px;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .22);
}
.shot-frame b {
  display: block;
  height: 8px;
  width: 46%;
  border-radius: 4px;
  background: rgba(255, 255, 255, .55);
  margin-bottom: 9px;
}
.shot-frame i { display: block; height: 34px; border-radius: 6px; background: rgba(255, 255, 255, .22); margin-bottom: 7px; }
.shot-frame span { display: block; height: 7px; border-radius: 4px; background: rgba(255, 255, 255, .22); margin-bottom: 6px; }
.shot-frame span:nth-of-type(2) { width: 70%; }
.shot-frame span:nth-of-type(3) { width: 84%; }
.shot-frame span:nth-of-type(4) { width: 58%; }

/* ---------- 13. 服务流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
.step { position: relative; text-align: center; padding: 0 16px; }
.step::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 34px;
  width: 24px;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(37, 99, 235, .45) 0 4px, transparent 4px 8px);
}
.step:last-child::after { display: none; }
.step i {
  display: grid;
  place-items: center;
  width: 68px;
  height: 68px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(37, 99, 235, .2);
  color: var(--blue-600);
  box-shadow: var(--shadow-xs);
  font-style: normal;
  font-size: 20px;
  font-weight: 800;
  transition: all .3s var(--ease);
}
.step:hover i { background: linear-gradient(135deg, var(--blue-500), var(--blue-700)); color: #fff; border-color: transparent; transform: translateY(-4px); }
.step b { display: block; font-size: 16px; color: var(--ink); margin-bottom: 6px; }
.step span { font-size: 13px; color: var(--muted); line-height: 1.7; }

.steps-6 { grid-template-columns: repeat(6, 1fr); }
.steps-6 .step { padding: 0 10px; }
.steps-6 .step::after { right: -10px; width: 18px; }

/* ---------- 14. CTA / 表单 ---------- */
.cta-section {
  position: relative;
  padding: 96px 0;
  background: linear-gradient(135deg, #071634, #123a86 55%, #0b2a63);
  color: #fff;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(700px 400px at 82% 20%, rgba(0, 180, 255, .26), transparent 62%);
}
.cta-section .container { position: relative; z-index: 2; }
.cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.cta-left h2 { font-size: 32px; color: #fff; margin-bottom: 16px; }
.cta-left > p { color: rgba(255, 255, 255, .72); font-size: 16px; margin-bottom: 30px; }

.contact-info { display: grid; gap: 14px; }
.contact-info li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .12);
}
.contact-info .icon { color: #7dd3fc; }
.contact-info b { display: block; font-size: 15px; color: #fff; }
.contact-info span { font-size: 13px; color: rgba(255, 255, 255, .6); }

.form-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .28);
  color: var(--text);
}
.form-card h3 { font-size: 20px; margin-bottom: 6px; }
.form-card > p { font-size: 13.5px; color: var(--muted); margin-bottom: 22px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.form-group label i { color: #ef4444; font-style: normal; margin-left: 3px; }
.form-control {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfdff;
  outline: none;
  transition: all .25s var(--ease);
}
textarea.form-control { height: 104px; padding: 12px 14px; resize: vertical; line-height: 1.7; }
.form-control:focus { border-color: var(--blue-500); background: #fff; box-shadow: 0 0 0 3px rgba(37, 99, 235, .12); }
.form-control::placeholder { color: #b6c0d0; }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; background-size: 15px; padding-right: 38px; }
.form-agree { display: flex; align-items: flex-start; gap: 8px; font-size: 12.5px; color: var(--muted); margin: 4px 0 18px; }
.form-agree input { margin-top: 3px; accent-color: var(--blue-600); }
.form-tip { font-size: 13px; margin-top: 14px; text-align: center; }
.form-tip.is-ok { color: #16a34a; }
.form-tip.is-err { color: #ef4444; }

/* ---------- 15. 页脚 ---------- */
.site-footer { background: #061229; color: rgba(255, 255, 255, .6); }
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 2.4fr .9fr;
  gap: 48px;
  padding: 66px 0 46px;
}
.footer-brand .logo-text strong { color: #fff; }
.footer-brand > p { font-size: 13.5px; line-height: 1.9; margin: 18px 0 20px; max-width: 320px; }
.footer-contact { display: grid; gap: 10px; }
.footer-contact li { display: flex; align-items: center; gap: 9px; font-size: 13.5px; }
.footer-contact .icon { width: 16px; height: 16px; color: #38bdf8; flex-shrink: 0; }
.footer-contact b { color: rgba(255, 255, 255, .9); font-weight: 600; }

.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 18px; }
.footer-col a { display: block; font-size: 13.5px; padding: 5px 0; }
.footer-col a:hover { color: #7dd3fc; }

.footer-qr { text-align: center; }
.qr-box {
  width: 122px;
  height: 122px;
  margin: 0 auto 12px;
  padding: 9px;
  border-radius: 12px;
  background: #fff;
  position: relative;
}
.qr-img {
  width: 100%;
  height: 100%;
  background-color: #fff;
  background-image:
    linear-gradient(45deg, #0f172a 25%, transparent 25%, transparent 75%, #0f172a 75%),
    linear-gradient(45deg, #0f172a 25%, transparent 25%, transparent 75%, #0f172a 75%);
  background-size: 12px 12px;
  background-position: 0 0, 6px 6px;
  opacity: .85;
}
.qr-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 0 0 3px #fff;
}
.footer-qr p { font-size: 13px; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 22px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
}
.footer-bottom a:hover { color: #7dd3fc; }

/* ---------- 16. 内页头部 ---------- */
.page-banner {
  position: relative;
  padding: calc(var(--header-h) + 66px) 0 76px;
  background: var(--navy);
  color: #fff;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(700px 400px at 85% 10%, rgba(0, 180, 255, .24), transparent 60%),
    linear-gradient(140deg, #071634, #123a86 60%, #0a1e46);
}
.page-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(circle at 70% 30%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 70% 30%, #000 20%, transparent 72%);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { font-size: 38px; color: #fff; margin-bottom: 14px; }
.page-banner > .container > p { font-size: 16px; color: rgba(255, 255, 255, .72); max-width: 720px; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
  margin-bottom: 16px;
}
.breadcrumb a:hover { color: #7dd3fc; }
.breadcrumb .icon { width: 13px; height: 13px; opacity: .6; }

/* ---------- 17. 内容通用块 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.split.reverse .split-visual { order: -1; }

.feature-list { display: grid; gap: 16px; }
.feature-item { display: flex; gap: 14px; }
.feature-item .icon-box {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  margin-bottom: 0;
  flex-shrink: 0;
}
.feature-item .icon-box .icon { width: 22px; height: 22px; }
.feature-item h4 { font-size: 16px; margin-bottom: 4px; }
.feature-item p { font-size: 13.5px; color: var(--muted); line-height: 1.8; }

.num-list { display: grid; gap: 18px; counter-reset: n; }
.num-item { display: flex; gap: 16px; }
.num-item > i {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: #fff;
  font-style: normal;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(37, 99, 235, .26);
}
.num-item h4 { font-size: 16px; margin-bottom: 4px; }
.num-item p { font-size: 13.5px; color: var(--muted); line-height: 1.85; }

.info-panel {
  padding: 34px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #f2f7ff, #e8f1ff);
  border: 1px solid #dbe7fb;
}
.info-panel h3 { font-size: 20px; margin-bottom: 14px; }
.info-panel p { font-size: 14px; color: var(--muted); line-height: 1.9; }

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 30px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.stat-strip div { text-align: center; }
.stat-strip strong { display: block; font-size: 30px; color: var(--blue-600); line-height: 1.25; }
.stat-strip strong i { font-style: normal; font-size: 15px; }
.stat-strip span { font-size: 13px; color: var(--muted); }

/* 卡片通用 */
.soft-card {
  padding: 28px 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: all .3s var(--ease);
}
.soft-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(37, 99, 235, .3); }
.soft-card h4 { font-size: 17px; margin-bottom: 10px; }
.soft-card p { font-size: 14px; color: var(--muted); line-height: 1.85; }

/* 表格 */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
.data-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.data-table th, .data-table td { padding: 16px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--line); }
.data-table th { background: var(--bg-soft); color: var(--ink); font-weight: 700; font-size: 14px; white-space: nowrap; }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: #f8fbff; }
.data-table td:first-child { font-weight: 600; color: var(--ink); }

/* 资质墙 */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-item {
  padding: 26px 20px;
  text-align: center;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: all .3s var(--ease);
}
.cert-item:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.cert-item .icon { width: 32px; height: 32px; margin: 0 auto 12px; color: var(--blue-600); }
.cert-item b { display: block; font-size: 15px; color: var(--ink); margin-bottom: 4px; }
.cert-item span { font-size: 12.5px; color: var(--muted); }

/* 时间轴 */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--blue-400), rgba(37, 99, 235, .12)); }
.timeline-item { position: relative; padding-bottom: 28px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--blue-500);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
}
.timeline-item b { display: block; font-size: 15px; color: var(--blue-600); margin-bottom: 4px; }
.timeline-item h4 { font-size: 16px; margin-bottom: 4px; }
.timeline-item p { font-size: 13.5px; color: var(--muted); }

/* 折叠问答 */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; margin-bottom: 12px; overflow: hidden; }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 22px; background: none; border: 0; cursor: pointer; text-align: left; font-size: 15px; font-weight: 600; color: var(--ink); }
.faq-q .icon { flex-shrink: 0; color: var(--blue-600); transition: transform .28s var(--ease); }
.faq-item.is-open .faq-q .icon { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 22px 20px; font-size: 14px; color: var(--muted); line-height: 1.9; }
.faq-item.is-open { border-color: rgba(37, 99, 235, .3); box-shadow: var(--shadow-xs); }

/* 地图占位 */
.map-box {
  position: relative;
  height: 340px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, #e8f1ff, #dce9ff);
}
.map-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, .12) 1px, transparent 1px);
  background-size: 40px 40px;
}
.map-box::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 58%;
  height: 3px;
  background: rgba(37, 99, 235, .22);
  transform: rotate(-8deg);
}
.map-pin {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -100%);
  z-index: 3;
  text-align: center;
}
.map-pin i { display: grid; place-items: center; width: 42px; height: 42px; margin: 0 auto 6px; border-radius: 50% 50% 50% 0; transform: rotate(-45deg); background: linear-gradient(135deg, var(--blue-500), var(--blue-700)); color: #fff; box-shadow: 0 10px 22px rgba(37, 99, 235, .36); }
.map-pin i .icon { transform: rotate(45deg); width: 18px; height: 18px; }
.map-pin b {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 8px;
  background: #fff;
  font-size: 13px;
  color: var(--ink);
  box-shadow: var(--shadow);
}

/* ---------- 18. 悬浮工具条 ---------- */
.float-tools {
  position: fixed;
  right: 22px;
  bottom: 92px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-tool {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  color: var(--blue-600);
  cursor: pointer;
  transition: all .28s var(--ease);
}
.float-tool:hover { transform: translateY(-3px); color: #fff; background: linear-gradient(135deg, var(--blue-500), var(--blue-700)); border-color: transparent; }
.float-tool .icon { width: 21px; height: 21px; }
.float-tip {
  position: absolute;
  right: 64px;
  top: 50%;
  transform: translateY(-50%);
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all .26s var(--ease);
  box-shadow: var(--shadow);
}
.float-tool-wrap { position: relative; }
.float-tool-wrap:hover .float-tip { opacity: 1; visibility: visible; right: 60px; }

.back-top {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: #fff;
  border: 0;
  cursor: pointer;
  box-shadow: var(--shadow-blue);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .28s var(--ease);
}
.back-top.is-show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { transform: translateY(-3px); }

/* ---------- 19. 动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: var(--d, 0s); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 19.5 锚点偏移 ---------- */
[id] { scroll-margin-top: 96px; }

/* ---------- 20. 响应式（兼容平板 / 手机预览） ---------- */

/* 顶部导航按可用宽度逐级降级，任何桌面宽度下都保持单行不换行 */
@media (max-width: 1279px) {
  .header-phone { display: none; }
}
@media (max-width: 1080px) {
  .logo-text em { display: none; }
  .nav a { font-size: 14px; padding: 10px 8px; }
  .nav a::after { left: 8px; right: 8px; }
}

@media (max-width: 1180px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 520px; margin: 0 auto; }
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-column: 1 / -1; }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 30px 0; }
  .step:nth-child(3)::after { display: none; }
  .steps-6 { grid-template-columns: repeat(3, 1fr); gap: 30px 0; }
  .steps-6 .step:nth-child(3)::after { display: none; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .loop-bar { grid-template-columns: repeat(2, 1fr); gap: 22px 0; }
  .loop-step:nth-child(3)::before, .loop-step:nth-child(3)::after { display: none; }
}

@media (max-width: 900px) {
  .nav, .header-phone { display: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .site-header.is-solid .nav-toggle { border-color: var(--line); }
  .nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    padding: 14px 24px 20px;
    background: #fff;
    border-top: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 68px);
    overflow-y: auto;
  }
  .nav.is-open a { color: var(--text); padding: 12px 6px; border-bottom: 1px solid var(--line); }
  .nav.is-open a.is-active { color: var(--blue-600); }
  .nav.is-open .nav-item { display: block; }
  .nav.is-open .nav-drop { position: static; transform: none; opacity: 1; visibility: visible; width: auto; box-shadow: none; border: 0; padding: 4px 0 10px; background: transparent; }
  .header-actions .btn { display: none; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .split.reverse .split-visual { order: 0; }
  .cta-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 36px; }
  .section { padding: 68px 0; }
  .section-head h2 { font-size: 27px; }
  .page-banner h1 { font-size: 28px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; gap: 34px; }
  .float-tools { right: 12px; bottom: 16px; }
}

@media (max-width: 620px) {
  .container { padding: 0 18px; }
  .grid-4 { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 22px; flex-wrap: wrap; }
  .hero-stats li strong { font-size: 24px; }
  .steps { grid-template-columns: 1fr; gap: 26px 0; }
  .step::after { display: none; }
  .steps-6 { grid-template-columns: 1fr; gap: 26px 0; }
  .steps-6 .step::after { display: none; }
  .loop-bar { grid-template-columns: 1fr; gap: 20px 0; }
  .loop-step::before, .loop-step::after { display: none; }
  .hero-visual { grid-template-columns: 1fr; }
  .phone { max-width: 216px; }
  .phone-b { display: none; }
}