/* =========================================================
   医安智健 YIAN SMART HEALTH — 官网样式系统
   ========================================================= */

:root {
  --navy-900: #062a4e;
  --navy-850: #06243c;
  --navy-800: #08335c;
  --navy-700: #0b3d6b;
  --blue-700: #1259a8;
  --blue-600: #1668c0;
  --blue-500: #187ec0;
  --blue-400: #54b4e4;
  --blue-300: #8fcdec;
  --ink: #0b2338;
  --ink-2: #23405a;
  --body: #5b6e80;
  --muted: #8497a8;
  --line: #e4edf5;
  --line-soft: #eef4fa;
  --surface: #f7fafd;
  --surface-2: #f1f8fb;
  --white: #ffffff;
  --green: #0e9f6e;
  --shadow-sm: 0 2px 8px rgba(11, 35, 56, 0.04);
  --shadow-md: 0 10px 30px rgba(11, 35, 56, 0.07);
  --shadow-lg: 0 24px 60px rgba(11, 35, 56, 0.12);
  --radius: 14px;
  --radius-lg: 20px;
  --container: 1200px;
  --header-h: 84px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { 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: 1.85;
  color: var(--body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
svg { display: block; }

::selection { background: rgba(24, 126, 192, 0.18); color: var(--navy-900); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- 通用文字 ---------------- */
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--blue-500);
  text-transform: uppercase;
}

.h1 {
  font-size: clamp(28px, 3.55vw, 52px);
  line-height: 1.3;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--ink);
}

.h2 {
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.32;
  letter-spacing: -0.015em;
  font-weight: 700;
  color: var(--ink);
}

.h3 {
  font-size: clamp(19px, 1.7vw, 23px);
  line-height: 1.5;
  font-weight: 700;
  color: var(--ink);
}

.lead {
  font-size: 15px;
  line-height: 1.95;
  color: var(--body);
}

.text-blue { color: var(--blue-500); }
.text-navy { color: var(--navy-900); }
.text-green { color: var(--green); }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue-600);
  color: #fff;
  box-shadow: 0 8px 20px rgba(22, 104, 192, 0.22);
}
.btn-primary:hover {
  background: var(--blue-700);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(22, 104, 192, 0.3);
}

.btn-ghost {
  background: #fff;
  color: var(--ink);
  border-color: #d9e5f0;
}
.btn-ghost:hover {
  border-color: var(--blue-400);
  color: var(--blue-600);
  transform: translateY(-2px);
}

.btn-light {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
}
.btn-light:hover { background: rgba(255, 255, 255, 0.16); }

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

.btn .arrow { transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------------- 头部 ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(228, 237, 245, 0);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(11, 35, 56, 0.04);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 38px; height: 38px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
}
.brand-en {
  margin-top: 4px;
  font-size: 8.5px;
  letter-spacing: 0.19em;
  color: #93a6b6;
  font-weight: 500;
}

.nav { display: flex; align-items: center; gap: 34px; margin-left: auto; }
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: #274156;
  padding: 6px 0;
  transition: color 0.2s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--blue-600);
  transform: translateX(-50%);
  transition: width 0.28s var(--ease);
}
.nav-link:hover { color: var(--blue-600); }
.nav-link:hover::after,
.nav-link.is-active::after { width: 100%; }
.nav-link.is-active { color: var(--blue-600); font-weight: 600; }

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.6px;
  background: var(--ink);
  position: relative;
  transition: 0.25s;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.6px;
  background: var(--ink);
  transition: 0.25s;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
body.nav-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 78px 0 96px;
  background:
    radial-gradient(900px 480px at 78% 30%, rgba(84, 180, 228, 0.14), transparent 65%),
    radial-gradient(700px 400px at 10% 0%, rgba(24, 126, 192, 0.07), transparent 70%),
    linear-gradient(180deg, #f8fbfe 0%, #ffffff 88%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(24, 126, 192, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 126, 192, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 30% 30%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 30% 30%, #000 10%, transparent 72%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: 64px;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid #dbe8f5;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 100px;
  font-size: 12.5px;
  color: #3c6f9c;
  letter-spacing: 0.02em;
}
.hero-pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(24, 126, 192, 0.14);
}

.hero h1 { margin-top: 26px; }
.hero h1 .accent { color: var(--blue-500); display: block; }

.hero-desc {
  margin-top: 24px;
  max-width: 520px;
  font-size: 15px;
  line-height: 2;
  color: #5e7284;
}

.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }

.hero-meta {
  margin-top: 40px;
  display: flex;
  gap: 28px;
  padding-top: 26px;
  border-top: 1px solid #e8f0f8;
}
.hero-meta-item strong {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--navy-900);
}
.hero-meta-item span { font-size: 12.5px; color: var(--muted); }

.hero-visual { position: relative; }
.hero-visual img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 24px;
  box-shadow: 0 30px 70px rgba(16, 74, 120, 0.18);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  pointer-events: none;
}

.hero-float {
  position: absolute;
  left: -22px;
  bottom: 34px;
  background: #fff;
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: 0 14px 34px rgba(16, 74, 120, 0.16);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: floatY 5s ease-in-out infinite;
}
.hero-float .ico {
  width: 32px; height: 32px; border-radius: 9px;
  background: rgba(24, 126, 192, 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-500);
}
.hero-float strong { display: block; font-size: 13px; color: var(--ink); line-height: 1.4; }
.hero-float span { font-size: 11px; color: var(--muted); }

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ---------------- 通用区块 ---------------- */
.section { padding: 96px 0; }
.section-tight { padding: 70px 0; }
.section-alt { background: var(--surface); }

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}
.section-head .h2 { margin-top: 14px; }
.section-head .lead { margin-top: 18px; }

/* ---------------- 四重挑战 ---------------- */
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.challenge-card {
  position: relative;
  padding: 30px 26px 32px;
  border: 1px solid #e8f1f8;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fbfdff 0%, #f7fbfe 100%);
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.35s;
}
.challenge-card:hover {
  transform: translateY(-6px);
  border-color: #cfe4f5;
  box-shadow: var(--shadow-md);
}
.challenge-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-500);
  background: #fff;
  border: 1px solid #e2eef8;
  margin-bottom: 20px;
}
.challenge-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}
.challenge-card p { font-size: 13px; line-height: 1.9; color: #6a7d8e; }

/* ---------------- 深色数据带 ---------------- */
.band-dark {
  position: relative;
  padding: 84px 0 78px;
  background: var(--navy-900);
  color: #fff;
  overflow: hidden;
}
.band-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 320px at 82% 12%, rgba(84, 180, 228, 0.22), transparent 70%),
    radial-gradient(500px 300px at 8% 96%, rgba(24, 126, 192, 0.18), transparent 70%);
  pointer-events: none;
}
.band-dark .container { position: relative; }
.band-dark h2 { color: #fff; font-size: clamp(24px, 2.6vw, 34px); letter-spacing: 0.01em; }
.band-dark .band-sub {
  margin-top: 18px;
  max-width: 800px;
  font-size: 14px;
  line-height: 1.95;
  color: rgba(255, 255, 255, 0.62);
}

.stat-row {
  margin-top: 54px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.stat-value {
  font-size: clamp(40px, 5vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue-400);
  letter-spacing: -0.02em;
}
.stat-value small { font-size: 0.5em; font-weight: 600; margin-left: 2px; }
.stat-label {
  margin-top: 16px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}
.stat-note {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------------- 对比表 ---------------- */
.compare {
  background: var(--surface-2);
  border-radius: var(--radius-lg);
  padding: 18px;
}
.compare-head,
.compare-row {
  display: grid;
  grid-template-columns: 1.05fr 1.35fr 0.95fr;
  gap: 24px;
  align-items: center;
}
.compare-head {
  padding: 10px 22px 18px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: #7d93a6;
}
.compare-row {
  padding: 24px 22px;
  background: #fff;
  border-radius: 10px;
  margin-bottom: 10px;
  box-shadow: 0 1px 3px rgba(11, 35, 56, 0.03);
  transition: transform 0.3s var(--ease), box-shadow 0.3s;
}
.compare-row:last-child { margin-bottom: 0; }
.compare-row:hover { transform: translateX(4px); box-shadow: 0 6px 20px rgba(11, 35, 56, 0.07); }
.compare-pain { font-size: 15px; font-weight: 600; color: var(--ink); }
.compare-way { font-size: 13.5px; color: var(--blue-600); line-height: 1.7; }
.compare-value { font-size: 13.5px; font-weight: 600; color: var(--green); }

/* ---------------- 产品 ---------------- */
.product-featured {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 54px 52px;
  border-radius: var(--radius-lg);
  background: var(--navy-900);
  color: #fff;
  overflow: hidden;
}
.product-featured::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(560px 340px at 88% 8%, rgba(84, 180, 228, 0.2), transparent 68%);
  pointer-events: none;
}
.product-featured > * { position: relative; }

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid rgba(120, 190, 235, 0.5);
  color: #9ed3f2;
  font-size: 12px;
  letter-spacing: 0.04em;
  background: rgba(84, 180, 228, 0.08);
}

.product-featured h3 {
  margin-top: 22px;
  font-size: clamp(24px, 2.5vw, 34px);
  line-height: 1.36;
  color: #fff;
  font-weight: 700;
}
.product-featured .desc {
  margin-top: 18px;
  font-size: 13.5px;
  line-height: 1.95;
  color: rgba(255, 255, 255, 0.62);
  max-width: 460px;
}

.feature-list {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 20px;
}
.feature-list li {
  position: relative;
  padding-left: 16px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-400);
}

/* 仪表盘示意 */
.dash {
  background: #fff;
  border-radius: 14px;
  padding: 22px 22px 18px;
  color: var(--ink);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
  transition: transform 0.5s var(--ease);
}
.product-featured:hover .dash { transform: perspective(1200px) rotateY(0) rotateX(0); }

.dash-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid #eef4f9;
}
.dash-title { font-size: 12.5px; font-weight: 600; color: var(--ink); }
.dash-status {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 10.5px; color: var(--green);
}
.dash-status i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 0 3px rgba(14, 159, 110, 0.14);
}

.dash-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 16px 0 4px;
}
.dash-metric span { font-size: 10px; color: var(--muted); display: block; }
.dash-metric strong {
  display: block;
  margin-top: 4px;
  font-size: 18px;
  font-weight: 700;
  color: var(--blue-500);
  letter-spacing: -0.01em;
}

.dash-chart { margin: 10px 0 4px; }
.dash-chart svg { width: 100%; height: auto; }

.dash-bars { margin-top: 4px; }
.dash-bar-row {
  display: flex; align-items: center; gap: 10px;
  font-size: 9.5px; color: #7d93a6;
  padding: 5px 0;
}
.dash-bar-row .name { width: 40px; flex-shrink: 0; }
.dash-bar-track {
  flex: 1; height: 5px; border-radius: 4px; background: #eaf2f9;
  overflow: hidden;
}
.dash-bar-fill {
  height: 100%; border-radius: 4px;
  background: linear-gradient(90deg, #1f86c9, #54b4e4);
  width: 0;
  transition: width 1.4s var(--ease);
}
.dash-bar-fill.alt { background: linear-gradient(90deg, #2f9fe0, #8fcdec); }
.dash-bar-fill.light { background: linear-gradient(90deg, #5cbde9, #b8e3f7); }

.product-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.product-card {
  padding: 30px 28px 18px;
  border: 1px solid #e8f1f8;
  border-radius: var(--radius);
  background: #fff;
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.35s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-6px);
  border-color: #cfe4f5;
  box-shadow: var(--shadow-md);
}
.product-card .num-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 11.5px;
  color: var(--blue-600);
  background: #eef7fd;
  border-radius: 100px;
  padding: 4px 12px;
  letter-spacing: 0.02em;
}
.product-card h3 { margin-top: 16px; font-size: 19px; font-weight: 700; color: var(--ink); }
.product-card .desc { margin-top: 10px; font-size: 13px; line-height: 1.85; color: #6a7d8e; }
.product-card ul { margin-top: 18px; }
.product-card ul li {
  font-size: 12.5px;
  color: #5f7488;
  padding: 10px 0;
  border-top: 1px solid #f1f6fa;
}

/* ---------------- 子页 Hero ---------------- */
.page-hero {
  position: relative;
  padding: 72px 0 64px;
  background:
    radial-gradient(760px 380px at 84% 0%, rgba(84, 180, 228, 0.16), transparent 66%),
    linear-gradient(180deg, #f6fafe 0%, #ffffff 100%);
  border-bottom: 1px solid #eef4f9;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 420px; height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(24, 126, 192, 0.1);
  box-shadow: 0 0 0 60px rgba(24, 126, 192, 0.03), 0 0 0 120px rgba(24, 126, 192, 0.02);
  pointer-events: none;
}
.page-hero .container { position: relative; }
.page-hero h1 {
  margin-top: 18px;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.32;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.page-hero .lead { margin-top: 18px; max-width: 680px; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: #93a6b6;
}
.breadcrumb a { color: #93a6b6; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--blue-600); }
.breadcrumb .sep { opacity: 0.6; }
.breadcrumb .current { color: var(--ink); }

/* ---------------- 通用内容块 ---------------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(160deg, #eaf4fc, #f7fbfe);
  border: 1px solid #e8f1f8;
  min-height: 320px;
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.check-list { margin-top: 26px; display: grid; gap: 14px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  font-size: 14px;
  color: #52677a;
  line-height: 1.8;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 5px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: rgba(24, 126, 192, 0.1);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='11' viewBox='0 0 24 24' fill='none' stroke='%23187ec0' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
.step {
  position: relative;
  padding: 30px 26px;
  background: #fff;
  border: 1px solid #e8f1f8;
  border-radius: var(--radius);
}
.step-num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--blue-400);
}
.step h3 { margin-top: 12px; font-size: 17px; color: var(--ink); }
.step p { margin-top: 10px; font-size: 13px; line-height: 1.9; color: #6a7d8e; }
.step::after {
  content: "";
  position: absolute;
  right: -12px; top: 46px;
  width: 12px; height: 1px;
  background: #d8e8f5;
}
.step:last-child::after { display: none; }

/* 标签页 */
.tabs { margin-top: 10px; }
.tab-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0;
}
.tab-btn {
  position: relative;
  padding: 12px 20px;
  background: none;
  border: 0;
  font-size: 14px;
  font-weight: 500;
  color: #6a7d8e;
  cursor: pointer;
  transition: color 0.2s;
}
.tab-btn::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--blue-600);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}
.tab-btn.is-active { color: var(--blue-600); font-weight: 600; }
.tab-btn.is-active::after { transform: scaleX(1); }
.tab-panel { display: none; padding: 34px 4px 0; }
.tab-panel.is-active { display: block; animation: fadeUp 0.5s var(--ease); }

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

/* 表格 */
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-table th, .spec-table td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid #eef4f9;
  vertical-align: top;
}
.spec-table th {
  font-size: 12px;
  font-weight: 600;
  color: #7d93a6;
  letter-spacing: 0.05em;
  background: #f8fbfe;
}
.spec-table td { color: #52677a; }
.spec-table td strong { color: var(--ink); font-weight: 600; }
.spec-table tr:hover td { background: #fbfdff; }

/* 案例卡 */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.case-card {
  border: 1px solid #e8f1f8;
  border-radius: var(--radius);
  padding: 32px;
  background: #fff;
  transition: transform 0.35s var(--ease), box-shadow 0.35s;
}
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.case-meta { display: flex; gap: 10px; flex-wrap: wrap; font-size: 11.5px; color: #7d93a6; }
.case-meta span {
  padding: 3px 10px;
  background: #f4f9fd;
  border-radius: 100px;
}
.case-card h3 { margin-top: 16px; font-size: 19px; color: var(--ink); }
.case-card p { margin-top: 10px; font-size: 13px; line-height: 1.9; color: #6a7d8e; }
.case-metrics {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid #f0f6fb;
}
.case-metric strong {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--blue-500);
  letter-spacing: -0.01em;
}
.case-metric span { font-size: 11.5px; color: var(--muted); }

/* 引用 */
.quote-card {
  background: var(--navy-900);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.quote-card::before {
  content: "“";
  position: absolute;
  right: 40px; top: -10px;
  font-size: 160px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.06);
}
.quote-card blockquote {
  position: relative;
  margin: 0;
  font-size: clamp(17px, 1.9vw, 22px);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.92);
  font-weight: 500;
}
.quote-author {
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* 时间线 */
.timeline { position: relative; margin-top: 10px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 10px; bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, #cfe4f5, #eef4f9);
}
.timeline-item { position: relative; padding: 0 0 34px 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: 3px; top: 8px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--blue-400);
  box-shadow: 0 0 0 4px rgba(84, 180, 228, 0.12);
}
.timeline-year {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-600);
  letter-spacing: 0.04em;
}
.timeline-item h3 { margin-top: 6px; font-size: 16px; color: var(--ink); }
.timeline-item p { margin-top: 6px; font-size: 13px; line-height: 1.85; color: #6a7d8e; }

/* 卡片网格通用 */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.info-card {
  padding: 30px 28px;
  border: 1px solid #e8f1f8;
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.info-card:hover { border-color: #cfe4f5; box-shadow: var(--shadow-sm); }
.info-card .ico {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: #eff8fe;
  color: var(--blue-500);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.info-card h3 { font-size: 16.5px; color: var(--ink); }
.info-card p { margin-top: 10px; font-size: 13px; line-height: 1.9; color: #6a7d8e; }

/* FAQ */
.faq { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  background: none;
  border: 0;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}
.faq-q .plus {
  width: 22px; height: 22px;
  flex-shrink: 0;
  position: relative;
  border-radius: 50%;
  background: #f1f8fd;
}
.faq-q .plus::before,
.faq-q .plus::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 10px; height: 1.5px;
  background: var(--blue-600);
  transform: translate(-50%, -50%);
  transition: transform 0.3s var(--ease);
}
.faq-q .plus::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.is-open .faq-q .plus::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.faq-a p {
  padding: 0 0 22px;
  font-size: 13.5px;
  line-height: 1.95;
  color: #6a7d8e;
  max-width: 860px;
}

/* CTA 条 */
.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 52px 56px;
  background: linear-gradient(120deg, #0a3760 0%, #062a4e 55%, #0c4670 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.cta-band::after {
  content: "";
  position: absolute;
  right: -60px; top: -60px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(84, 180, 228, 0.28), transparent 68%);
}
.cta-band > * { position: relative; }
.cta-band h2 { font-size: clamp(22px, 2.4vw, 30px); color: #fff; font-weight: 700; }
.cta-band p { margin-top: 12px; font-size: 13.5px; color: rgba(255, 255, 255, 0.6); }
.cta-band .actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------------- 页脚 ---------------- */
.site-footer {
  position: relative;
  padding: 66px 0 0;
  background: #04233a;
  color: rgba(255, 255, 255, 0.6);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 300px at 12% 0%, rgba(24, 126, 192, 0.16), transparent 70%);
  pointer-events: none;
}
.footer-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 0.85fr 0.85fr 1fr;
  gap: 48px;
  padding-bottom: 52px;
}
.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-en { color: rgba(255, 255, 255, 0.35); }
.footer-company {
  margin-top: 22px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}
.footer-desc {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.42);
  max-width: 300px;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-col li { margin-bottom: 11px; }
.footer-col a {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }
.footer-contact li { font-size: 12.5px; color: rgba(255, 255, 255, 0.5); }
.footer-contact strong { color: rgba(255, 255, 255, 0.85); font-weight: 500; }

.footer-bottom {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.32);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.32); }
.footer-bottom a:hover { color: rgba(255, 255, 255, 0.6); }

/* ---------------- 悬浮操作 ---------------- */
.float-actions {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  width: 46px; height: 46px;
  border-radius: 12px;
  border: 1px solid #e2eef8;
  background: #fff;
  color: var(--blue-600);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(11, 35, 56, 0.1);
  transition: all 0.25s var(--ease);
  position: relative;
}
.float-btn:hover { transform: translateY(-3px); background: var(--blue-600); color: #fff; }
.float-btn.chat { background: var(--blue-600); color: #fff; }
.float-btn.chat:hover { background: var(--blue-700); }
.float-btn .tip {
  position: absolute;
  right: 56px;
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  background: var(--navy-900);
  color: #fff;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: 0.25s;
}
.float-btn:hover .tip { opacity: 1; transform: translateY(-50%) translateX(0); }
#backTop { display: none; }
#backTop.is-visible { display: flex; }

/* ---------------- 弹窗表单 ---------------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(6, 36, 60, 0.55);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
.modal.is-open { opacity: 1; visibility: visible; }
.modal-dialog {
  width: 100%;
  max-width: 620px;
  max-height: 90vh;
  overflow-y: auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.3);
  transform: translateY(18px) scale(0.98);
  transition: transform 0.35s var(--ease);
}
.modal.is-open .modal-dialog { transform: none; }

.modal-head {
  padding: 26px 30px 18px;
  border-bottom: 1px solid #f0f6fb;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}
.modal-head .eyebrow { font-size: 11px; }
.modal-head h3 { margin-top: 8px; font-size: 21px; color: var(--ink); }
.modal-head p { margin-top: 6px; font-size: 12.5px; color: #7d93a6; }
.modal-close {
  width: 34px; height: 34px;
  flex-shrink: 0;
  border: 0;
  border-radius: 8px;
  background: #f4f9fd;
  color: #6a7d8e;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  transition: 0.2s;
}
.modal-close:hover { background: #e9f3fb; color: var(--ink); }

.modal-body { padding: 24px 30px 30px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; font-weight: 500; color: #40566b; }
.field label .req { color: #e2574c; margin-left: 2px; }
.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--ink);
  background: #fbfdff;
  border: 1px solid #e2edf6;
  border-radius: 8px;
  padding: 11px 13px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  outline: none;
}
.field textarea { resize: vertical; min-height: 78px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--blue-400);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(84, 180, 228, 0.15);
}
.field input::placeholder, .field textarea::placeholder { color: #a9bac8; }
.field .err {
  font-size: 11.5px;
  color: #e2574c;
  display: none;
}
.field.has-error input,
.field.has-error select { border-color: #f0b1ac; background: #fffafa; }
.field.has-error .err { display: block; }

.check-group { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-check {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid #e2edf6;
  border-radius: 100px;
  font-size: 12.5px;
  color: #5b6e80;
  cursor: pointer;
  transition: 0.2s;
  background: #fbfdff;
}
.chip-check input { position: absolute; opacity: 0; width: 0; height: 0; }
.chip-check:hover { border-color: #bcdcf3; }
.chip-check:has(input:checked) {
  border-color: var(--blue-500);
  color: var(--blue-600);
  background: #f0f8fe;
  font-weight: 500;
}

.form-foot {
  margin-top: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.form-note { font-size: 11.5px; color: #93a6b6; line-height: 1.6; }
.form-status {
  margin-top: 16px;
  font-size: 13px;
  border-radius: 8px;
  padding: 12px 14px;
  display: none;
}
.form-status.ok { display: block; background: #eef9f4; color: #0b7a55; }
.form-status.fail { display: block; background: #fef3f2; color: #b93a30; }

/* ---------------- 滚动动画 ---------------- */
.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }

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

/* ---------------- 响应式 ---------------- */
@media (max-width: 1100px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 520px; margin: 0 auto; width: 100%; }
  .hero-float { left: -8px; }
  .challenge-grid { grid-template-columns: repeat(2, 1fr); }
  .product-featured { grid-template-columns: 1fr; gap: 36px; padding: 40px; }
  .dash { transform: none; }
  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .split { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 900px) {
  :root { --header-h: 72px; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px;
    box-shadow: 0 20px 40px rgba(11, 35, 56, 0.08);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: 0.3s var(--ease);
  }
  body.nav-open .nav { transform: none; opacity: 1; visibility: visible; }
  .nav-link { padding: 14px 0; border-bottom: 1px solid #f1f6fa; }
  .nav-link::after { display: none; }
  .nav-toggle { display: flex; }
  .header-actions { margin-left: auto; }
  .header-actions .btn { display: none; }
  .header-inner { gap: 16px; }
  .section { padding: 68px 0; }
  .product-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .step::after { display: none; }
  .case-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr; gap: 28px; }
  .compare-head { display: none; }
  .compare-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px;
  }
  .compare-row::before {
    content: attr(data-label);
  }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 36px 28px; }
  .quote-card { padding: 32px 26px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .page-hero { padding: 48px 0 44px; }
}

@media (max-width: 560px) {
  body { font-size: 14px; }
  .container { padding: 0 18px; }
  .hero { padding: 44px 0 64px; }
  .hero-actions .btn { flex: 1; }
  .hero-meta { gap: 18px; }
  .hero-float { display: none; }
  .challenge-grid, .grid-4 { grid-template-columns: 1fr; }
  .stat-value { font-size: 42px; }
  .feature-list { grid-template-columns: 1fr; }
  .product-featured { padding: 28px 22px; }
  .dash { padding: 16px; }
  .featured-card { padding: 24px; }
  .compare { padding: 10px; }
  .form-grid { grid-template-columns: 1fr; }
  .modal { padding: 12px; }
  .modal-head, .modal-body { padding-left: 20px; padding-right: 20px; }
  .float-actions { right: 14px; bottom: 16px; }
  .float-btn { width: 42px; height: 42px; }
  .footer-inner { grid-template-columns: 1fr; }
}