/* ==========================================================================
   百思瑞 Basrium · 官网样式（蓝色商务 · 图文版式）
   图片占位：.media 容器后续直接替换为 <img> 即可
   ========================================================================== */

:root {
  --brand: #1656c0;
  --brand-deep: #0e3f8f;
  --brand-sky: #2f7ae5;
  --navy: #0d2140;
  --brand-soft: #eaf1fb;
  --ink: #1f2d3d;
  --ink-3: #64758c;
  --line: #dde5f0;
  --bg: #ffffff;
  --bg-alt: #f5f8fc;
  /* 圆角令牌：xs 线性控件 / sm 图标·小浮卡 / md 常规卡片·图片位 / lg 大卡·大面板 / pill 胶囊 */
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 18px;
  --r-pill: 999px;
  --shadow-card: 0 2px 6px rgba(13, 33, 64, .06), 0 18px 40px -22px rgba(13, 33, 64, .16);
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  --header-h: 64px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
::selection { background: rgba(22, 86, 192, .16); }

.shell { width: min(1160px, 92vw); margin-inline: auto; }

/* 跳到主内容 */
.skip-link {
  position: fixed; left: 16px; top: -56px; z-index: 200;
  padding: 10px 18px; background: var(--brand); color: #fff;
  border-radius: var(--r-xs); font-size: 14px; font-weight: 600;
  transition: top .25s;
}
.skip-link:focus { top: 14px; }

/* ============================ 创意背景工具 ============================ */
/* 点阵背景 */
.bg-dots { position: relative; }
.bg-dots::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(22, 86, 192, .14) 1.2px, transparent 1.2px);
  background-size: 22px 22px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 65%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 65%);
}
/* 光晕背景 */
.bg-glow { position: relative; overflow: hidden; }
.bg-glow::before, .bg-glow::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none; filter: blur(70px);
}
.bg-glow::before { width: 520px; height: 520px; background: rgba(47, 122, 229, .14); top: -220px; right: -120px; }
.bg-glow::after { width: 420px; height: 420px; background: rgba(22, 86, 192, .10); bottom: -200px; left: -140px; }
/* 斜纹装饰块 */
.bg-lines { position: relative; overflow: hidden; }
.bg-lines::before {
  content: ""; position: absolute; inset: -40%; pointer-events: none; opacity: .5;
  background: repeating-linear-gradient(-45deg, transparent 0 46px, rgba(22, 86, 192, .05) 46px 48px);
}

/* ============================ 顶部导航 ============================ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.site-header.is-scrolled { box-shadow: 0 2px 12px rgba(13, 33, 64, .08); }
.nav-bar { height: var(--header-h); display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; }
.brand-logo { height: 34px; width: auto; }
.nav-menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link { padding: 8px 16px; border-radius: var(--r-xs); font-size: 15px; color: var(--ink); font-weight: 500; transition: color .2s, background .2s; }
.nav-link:hover { color: var(--brand); background: var(--brand-soft); }
.nav-link.is-active { color: var(--brand); font-weight: 700; }
.nav-cta { margin-left: 12px; }
.nav-burger { display: none; margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: var(--r-xs); background: #fff; cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.nav-burger i { width: 18px; height: 2px; background: var(--navy); border-radius: 2px; transition: transform .3s, opacity .3s; }
.nav-burger.is-open i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.is-open i:nth-child(2) { opacity: 0; }
.nav-burger.is-open i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================ 按钮 ============================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 26px; border-radius: var(--r-pill);
  font-size: 15px; font-weight: 600; line-height: 1.5;
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s, box-shadow .2s;
  white-space: nowrap;
}
.btn-lg { padding: 13px 34px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 20px -8px rgba(22, 86, 192, .5); }
.btn-primary:hover { background: var(--brand-deep); transform: translateY(-1px); }
.btn-glass { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .4); }
.btn-glass:hover { background: rgba(255, 255, 255, .2); }
.btn-white { background: #fff; color: var(--brand-deep); }
.btn-white:hover { background: var(--brand-soft); }

/* ============================ 区块 ============================ */
.section { padding: 104px 0; position: relative; }
.section-alt { background: var(--bg-alt); }
.section-deep { background: var(--navy); color: #b9c7da; }
.section--sm { padding: 72px 0; }
.section > .shell { position: relative; z-index: 1; }

.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head--sm { margin-bottom: 32px; }
.center { text-align: center; margin-inline: auto; }
.center-link { text-align: center; margin-top: 32px; }
.eyebrow { display: inline-block; font-size: 13px; letter-spacing: 3px; color: var(--brand); font-weight: 700; margin-bottom: 10px; }
.eyebrow::before { content: ""; display: inline-block; width: 18px; height: 2px; background: var(--brand); vertical-align: middle; margin-right: 8px; }
.section-deep .eyebrow { color: #7fa8e8; }
.section-deep .eyebrow::before { background: #7fa8e8; }
.section-title { font-size: clamp(26px, 3.2vw, 36px); font-weight: 700; color: var(--navy); line-height: 1.45; letter-spacing: .5px; }
.section-deep .section-title { color: #fff; }
.section-desc { margin-top: 12px; font-size: 16px; color: var(--ink-3); }
.section-deep .section-desc { color: #93a5bd; }

/* ============================ 图片占位 ============================ */
.media {
  position: relative;
  border-radius: var(--r-md); overflow: hidden;
  background: url("../images/placeholder.svg") center / cover no-repeat;
}
.media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border: none; }
.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-3x2 { aspect-ratio: 3 / 2; }
.media-21x9 { aspect-ratio: 21 / 9; }

/* 带装饰框的图片位 */
.media-frame { position: relative; }
.media-frame::after {
  content: ""; position: absolute; inset: 16px -14px -14px 16px;
  border: 2px solid var(--bg); opacity: .25; border-radius: var(--r-md); z-index: 0;
}

/* ============================ 卡片 ============================ */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 30px 28px;
  box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-4px); border-color: #b9cbe6; }

.icon-badge {
  width: 52px; height: 52px; border-radius: var(--r-md);
  background: linear-gradient(140deg, var(--brand-sky), var(--brand));
  color: #fff; display: grid; place-items: center; margin-bottom: 20px;
  box-shadow: 0 8px 18px -8px rgba(22, 86, 192, .55);
}
.icon-badge i { font-size: 26px; line-height: 1; }

.card h3 { font-size: 18px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.card p { color: var(--ink-3); font-size: 15px; line-height: 1.75; }

.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px; border-radius: var(--r-pill);
  background: #fff; border: 1px solid var(--line);
  font-size: 14px; color: var(--ink); box-shadow: var(--shadow-card);
}
.chip::before { content: "✓"; color: var(--brand); font-weight: 800; font-size: 13px; }

/* ---------- 业务大卡（上图下文，参考用户提供版式） ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 26px; }
.biz-card {
  grid-column: span 2; position: relative;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden; box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s;
}
.biz-card:hover { transform: translateY(-5px); box-shadow: 0 24px 50px -20px rgba(13, 33, 64, .25); }
.biz-card:nth-child(4), .biz-card:nth-child(5) { grid-column: span 3; }
.biz-card .media { border-radius: 0; border: none; border-bottom: 1px solid var(--line); }
.biz-body { padding: 26px 30px 32px; }
.biz-ico {
  position: relative; z-index: 2;
  width: 54px; height: 54px; border-radius: var(--r-sm); margin: -57px 0 20px;
  background: linear-gradient(145deg, #2f7ae5, #114a9e);
  color: #fff; display: grid; place-items: center;
  box-shadow: 0 10px 22px -8px rgba(17, 74, 158, .55);
  border: 3px solid #fff;
}
.biz-ico i { font-size: 26px; line-height: 1; }
.biz-body h3 { font-size: 20px; font-weight: 700; color: var(--navy); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.biz-body p { margin-top: 12px; font-size: 15px; color: var(--ink-3); line-height: 1.85; }
.tag-new {
  font-size: 12px; font-weight: 700; letter-spacing: 1px; color: #fff;
  background: linear-gradient(145deg, #2f7ae5, #1656c0);
  padding: 2px 12px; border-radius: var(--r-pill);
}
@media (max-width: 1024px) {
  .biz-card, .biz-card:nth-child(4), .biz-card:nth-child(5) { grid-column: span 3; }
}
@media (max-width: 620px) {
  .biz-card, .biz-card:nth-child(4), .biz-card:nth-child(5) { grid-column: span 6; }
}

/* ============================ Hero ============================ */
.hero {
  position: relative; overflow: hidden;
  padding: calc(var(--header-h) + 72px) 0 96px;
  background: linear-gradient(180deg, #eef4fc 0%, #fff 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: var(--r-pill);
  background: #fff; border: 1px solid #c9dbf3; color: var(--brand-deep);
  font-size: 13.5px; font-weight: 600; margin-bottom: 24px;
  box-shadow: 0 4px 12px -6px rgba(13, 33, 64, .12);
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }
.hero h1 { font-size: clamp(32px, 4.8vw, 50px); font-weight: 800; color: var(--navy); line-height: 1.35; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero-sub { margin-top: 20px; max-width: 480px; font-size: 16.5px; color: var(--ink-3); }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-facts { margin-top: 44px; display: flex; gap: 36px; flex-wrap: wrap; }
.hero-facts .fact b { display: block; font-size: 26px; font-weight: 800; color: var(--brand); line-height: 1.3; }
.hero-facts .fact span { font-size: 13.5px; color: var(--ink-3); }

/* ---------- 内页页头（覆盖大 Hero 参数） ---------- */
.page-hero { padding-bottom: 72px; }
.page-hero .hero-grid { align-items: end; }
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); }

/* ---------- 首页深色大 Hero ---------- */
.hero-dark {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(900px 480px at 76% -10%, rgba(47, 122, 229, .38), transparent 62%),
    radial-gradient(700px 420px at 8% 8%, rgba(22, 86, 192, .30), transparent 60%),
    linear-gradient(180deg, #081733 0%, #0a1f44 55%, #0c2450 100%);
  padding: calc(var(--header-h) + 96px) 0 0;
}
.hero-dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(122, 168, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 168, 255, .07) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(80% 70% at 50% 0%, #000 25%, transparent 100%);
  -webkit-mask-image: radial-gradient(80% 70% at 50% 0%, #000 25%, transparent 100%);
}
.hero-dark::after {
  content: ""; position: absolute; width: 720px; height: 720px; left: 50%; top: 30%;
  transform: translateX(-50%); border-radius: 50%; pointer-events: none;
  border: 1px solid rgba(122, 168, 255, .14);
  box-shadow: 0 0 0 120px rgba(122, 168, 255, .045), 0 0 0 260px rgba(122, 168, 255, .03);
}
/* 雷达式扩散圆环 */
.hero-ring {
  position: absolute; left: 50%; top: 30%; width: 720px; height: 720px;
  border-radius: 50%; pointer-events: none; opacity: 0;
  border: 1px solid rgba(122, 168, 255, .28);
  transform: translateX(-50%) scale(.62);
  animation: hero-ripple 9s cubic-bezier(.4, 0, .6, 1) infinite;
}
.hero-ring-2 { animation-delay: 4.5s; }
@keyframes hero-ripple {
  0%   { transform: translateX(-50%) scale(.62); opacity: 0; }
  10%  { opacity: .85; }
  70%  { opacity: 0; }
  100% { transform: translateX(-50%) scale(1.45); opacity: 0; }
}
.hero-dark .shell { position: relative; z-index: 1; }
.hero-dark .hero-center { max-width: 900px; margin-inline: auto; text-align: center; }
.hero-badge-dark {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px; border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .07); border: 1px solid rgba(154, 190, 255, .35);
  color: #bcd2f7; font-size: 13.5px; font-weight: 600; letter-spacing: 1px; margin-bottom: 30px;
}
.hero-badge-dark .dot { width: 7px; height: 7px; border-radius: 50%; background: #5b9bff; box-shadow: 0 0 12px #5b9bff; }
.hero-dark h1 {
  font-size: clamp(40px, 6.8vw, 72px); font-weight: 800; line-height: 1.25;
  letter-spacing: 3px; color: #fff;
}
.hero-dark h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #7db2ff 5%, #3f7fe8 50%, #9cc3ff 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-dark .hero-sub { margin: 24px auto 0; max-width: 750px; color: #9fb2ca; font-size: 17px; }
.hero-dark .hero-actions { margin-top: 40px; justify-content: center; }
.hero-dark .btn-primary { box-shadow: 0 12px 34px -10px rgba(59, 130, 246, .65); }
.hero-dark .btn-outline { background: transparent; color: #dbe7fb; border-color: rgba(154, 190, 255, .5); }
.hero-dark .btn-outline:hover { background: rgba(255, 255, 255, .08); border-color: #9abefe; }
.hero-facts-dark { margin-top: 56px; display: flex; justify-content: center; gap: 0; border-top: 1px solid rgba(154, 190, 255, .18); }
.hero-facts-dark .fact { flex: 1; max-width: 240px; padding: 26px 10px; border-left: 1px solid rgba(154, 190, 255, .14); }
.hero-facts-dark .fact:first-child { border-left: none; }
.hero-facts-dark .fact b { display: block; font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; color: #fff; line-height: 1.3; letter-spacing: 1px; }
.hero-facts-dark .fact b i { font-style: normal; color: #5b9bff; }
.hero-facts-dark .fact span { font-size: 13.5px; color: #8ba3c7; }
/* 深色环境下的宽幅图片位 */
.media-dark { border-color: rgba(154, 190, 255, .45); }
.hero-banner { position: relative; z-index: 1; margin-top: 64px; }
.hero-banner .media { border-radius: var(--r-lg) var(--r-lg) 0 0; border-bottom: none; box-shadow: 0 -30px 80px -30px rgba(59, 130, 246, .35); }

/* ---------- 首页：优势清单 / 行业胶囊 / 保障条 ---------- */
.adv-list { margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; }
.adv-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--ink); }
.adv-list li > div { min-width: 0; }
.adv-list li > div b { display: block; font-size: 15px; font-weight: 700; color: var(--navy); }
.adv-list li > div span { display: block; margin-top: 3px; font-size: 13.5px; color: var(--ink-3); line-height: 1.6; }
.adv-list li > i {
  flex: none; width: 38px; height: 38px; border-radius: var(--r-sm);
  background: #fff; border: 1px solid var(--line); color: var(--brand);
  display: grid; place-items: center; font-size: 18px; line-height: 1;
}
.ind-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-bottom: 40px; }
.ind-list--sm { margin-bottom: 14px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.ind-item {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .16);
  color: #c3cfdf; font-size: 14.5px;
}
.ind-item i { color: #7fa8e8; font-size: 16px; line-height: 1; }
.section-deep .link-more { color: #7fa8e8; }
.guarantee-strip {
  margin-top: 48px; padding-top: 30px; border-top: 1px dashed #c4d3e8;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px;
}
.guarantee-strip .g-label { font-size: 14px; font-weight: 700; letter-spacing: 2px; color: var(--navy); margin-right: 6px; }

/* ============================ 图文交替行 ============================ */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.feature-row.rev .feature-copy { order: 2; }
.feature-copy h2 { font-size: clamp(23px, 2.6vw, 31px); font-weight: 700; color: var(--navy); line-height: 1.5; }
.feature-copy p { margin-top: 14px; color: var(--ink-3); font-size: 15.5px; }
.feature-list { margin-top: 24px; display: grid; gap: 12px; }
@media (min-width: 1025px) { .feature-list { grid-template-columns: 1fr 1fr; column-gap: 24px; } }
.feature-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--ink); }
.feature-list .tick { flex: none; margin-top: 5px; font-size: 16px; line-height: 1; color: var(--brand); }
.link-more { display: inline-flex; align-items: center; gap: 6px; margin-top: 28px; color: var(--brand); font-weight: 700; font-size: 15px; }
.link-more::after { content: "→"; transition: transform .2s; }
.link-more:hover::after { transform: translateX(4px); }

/* ============================ 客户滚动条 ============================ */
.marquee { position: relative; overflow: hidden; padding: 6px 0;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee-track { display: flex; gap: 14px; width: max-content; animation: marquee 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.marquee .pill {
  padding: 12px 26px; border-radius: var(--r-pill); white-space: nowrap;
  background: #fff; border: 1px solid var(--line);
  font-size: 15px; color: var(--ink); display: flex; align-items: center; gap: 9px;
}
.marquee .pill::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }
.section-deep .marquee .pill { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .16); color: #c3cfdf; }

/* ============================ 流程（std-card 样式，见服务标准卡） ============================ */
.grid-4 .std-card { padding: 36px 20px 34px; }
.grid-4 .std-card p { font-size: 14.5px; }

/* ============================ 案例卡 ============================ */
.case-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.case-card .media { border-radius: 0; border: none; border-bottom: 1px solid var(--line); }
.case-body { padding: 26px 26px 28px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.case-tag { align-self: flex-start; display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; color: var(--brand); background: var(--brand-soft); padding: 3px 12px; border-radius: var(--r-pill); }
.case-tag i { font-size: 13px; line-height: 1; }
.case-body h3 { font-size: 17.5px; }
.case-body p { flex: 1; }
.case-meta { padding-top: 14px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--ink-3); }
.case-meta b { color: var(--ink); font-weight: 600; }

/* ---------- about：公司概况（居中导语 + 数据看板） ---------- */
.profile-lead { max-width: 820px; margin: 0 auto; text-align: center; }
.profile-lead .section-title { margin-inline: auto; }
.profile-lead .lead { margin-top: 18px; font-size: 16.5px; color: var(--ink-3); }
.profile-points { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.stat-board {
  position: relative; margin-top: 56px; overflow: hidden;
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}
.stat-board::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; opacity: .75;
  background: linear-gradient(90deg, var(--brand-sky), var(--brand-deep));
}
.stat { padding: 38px 16px 34px; text-align: center; border-left: 1px solid var(--line); }
.stat:first-child { border-left: none; }
.stat b {
  display: block; font-size: clamp(30px, 3.4vw, 42px); font-weight: 800; line-height: 1.25; letter-spacing: 1px;
  background: linear-gradient(140deg, var(--brand-sky), var(--brand-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat span { font-size: 14px; color: var(--ink-3); }
@media (max-width: 860px) {
  .stat-board { grid-template-columns: 1fr 1fr; }
  .stat { border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: none; }
  .stat:nth-child(odd) { border-left: none; }
}

/* ---------- about：核心业务覆盖（横向图文行） ---------- */
.biz-rows { display: grid; gap: 18px; }
.biz-row {
  display: grid; grid-template-columns: 240px 1fr; gap: 32px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px 32px 20px 20px; box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.biz-row:hover { transform: translateY(-3px); border-color: #b9cbe6; box-shadow: 0 20px 44px -22px rgba(13, 33, 64, .24); }
.biz-row .media { border-radius: var(--r-md); }
.biz-row h3 { font-size: 19px; font-weight: 700; color: var(--navy); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.biz-row h3 .num { font-size: 14px; font-weight: 800; color: #9db9dd; letter-spacing: 1px; }
.biz-row p { margin-top: 8px; color: var(--ink-3); font-size: 15px; line-height: 1.8; }
.biz-row .link-more { margin-top: 10px; font-size: 14px; }
.row-ico { flex: none; width: 34px; height: 34px; border-radius: var(--r-sm); background: var(--brand-soft); color: var(--brand); display: grid; place-items: center; }
.row-ico i { font-size: 17px; line-height: 1; }
@media (max-width: 860px) {
  .biz-row { grid-template-columns: 1fr; gap: 16px; padding: 18px; }
}

/* ---------- cases：服务标准卡 ---------- */
.std-card { position: relative; overflow: hidden; text-align: center; padding: 42px 30px 40px; background: linear-gradient(180deg, #fff 0%, #f4f8fd 100%); }
.std-card .icon-badge { margin: 0 auto 20px; }
.std-card h3 { font-size: 20px; }
.std-card h3 small { display: block; font-size: 12px; font-weight: 600; letter-spacing: 3px; color: #9db9dd; margin-top: 2px; }
.std-card p { max-width: 280px; margin-inline: auto; }
.std-card::after {
  content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  width: 72px; height: 4px; border-radius: var(--r-pill) var(--r-pill) 0 0;
  background: linear-gradient(90deg, var(--brand-sky), var(--brand-deep));
}

/* ---------- services：页内目录 + 大数字底纹 ---------- */
.svc-nav-wrap {
  position: sticky; top: var(--header-h); z-index: 40;
  background: rgba(255, 255, 255, .92); border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.svc-nav { display: flex; align-items: center; gap: 10px; padding: 12px 0; overflow-x: auto; scrollbar-width: none; }
.svc-nav::-webkit-scrollbar { display: none; }
.svc-nav b { flex: none; font-size: 14px; color: var(--ink-3); font-weight: 600; margin-right: 6px; white-space: nowrap; }
.svc-nav a {
  flex: none; display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 18px; border-radius: var(--r-pill);
  border: 1px solid #c9dbf3; background: #fff; color: var(--brand-deep);
  font-size: 14px; font-weight: 600; white-space: nowrap; transition: background .2s, color .2s, border-color .2s;
}
.svc-nav a i { font-style: normal; font-weight: 800; color: #9db9dd; }
.svc-nav a:hover { background: var(--brand); border-color: var(--brand); color: #fff; }
.svc-nav a:hover i { color: rgba(255, 255, 255, .75); }
.svc-nav a.is-active { background: var(--brand); border-color: var(--brand); color: #fff; }
.svc-nav a.is-active i { color: rgba(255, 255, 255, .75); }
.svc-sec { scroll-margin-top: calc(var(--header-h) + 62px); }
.feature-copy { position: relative; isolation: isolate; }
.big-num {
  position: absolute; z-index: -1; top: -58px; left: -6px;
  font-size: clamp(96px, 10vw, 132px); font-weight: 800; line-height: 1; letter-spacing: 2px;
  color: rgba(22, 86, 192, .07); user-select: none;
}
.feature-row.rev .big-num, .feature-row.rev .eyebrow { order: 0; }
.feature-copy .link-more { display: inline-flex; }

/* ============================ 引言 ============================ */
.quote-band { position: relative; padding: 96px 0; background: linear-gradient(120deg, var(--brand-deep) 0%, var(--brand) 100%); color: #fff; overflow: hidden; }
.quote-band::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, .16) 1.5px, transparent 1.5px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, transparent, #000 50%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 50%, transparent);
}
.quote-band::after { content: "”"; position: absolute; right: 8%; bottom: -46px; font-size: 260px; font-family: Georgia, serif; color: rgba(255, 255, 255, .12); line-height: 1; }
.quote-inner { position: relative; z-index: 1; text-align: center; max-width: 760px; margin-inline: auto; }
.quote-inner blockquote { font-size: clamp(21px, 2.6vw, 30px); font-weight: 700; line-height: 1.7; letter-spacing: 1px; }
.quote-inner footer { margin-top: 16px; color: rgba(255, 255, 255, .8); font-size: 14.5px; letter-spacing: 2px; }

/* ============================ CTA ============================ */
.cta-section { padding: 110px 0; }
.cta-flush { padding-top: 0; }
.cta-card {
  position: relative; overflow: hidden; text-align: center;
  padding: 76px 40px; border-radius: var(--r-lg); color: #fff;
  background: linear-gradient(120deg, var(--navy) 0%, var(--brand-deep) 60%, var(--brand) 100%);
  box-shadow: 0 30px 70px -30px rgba(14, 63, 143, .6);
}
.cta-card::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.cta-card::after {
  content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 122, 229, .55), transparent 65%);
  top: -210px; right: -100px;
}
.cta-card > * { position: relative; z-index: 1; }
.cta-card h2 { font-size: clamp(25px, 3.2vw, 34px); font-weight: 800; letter-spacing: 1px; }
.cta-card p { margin-top: 12px; font-size: 16px; opacity: .92; }
.cta-actions { margin-top: 32px; display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ============================ 表单 ============================ */
.form-card { padding: 34px 32px; }
.form-title { font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.form-sub { color: var(--ink-3); font-size: 14.5px; margin-bottom: 24px; }
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; color: var(--ink); }
.field label em { font-style: normal; color: #c9252d; margin-left: 3px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px; font: inherit; font-size: 15px; color: var(--ink);
  background: #fff; border: 1px solid #cdd8e5; border-radius: var(--r-xs);
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(22, 86, 192, .14); }
.form-note { font-size: 13px; color: var(--ink-3); margin-top: 12px; }
.form-ok { display: none; margin-top: 16px; padding: 12px 16px; border-radius: var(--r-xs); background: #eaf4ec; border: 1px solid #c4ddc9; color: #22683a; font-size: 14px; font-weight: 600; }
.form-ok.is-visible { display: block; }

.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: start; }
.contact-cards { display: grid; gap: 16px; }

.info-line { display: flex; gap: 16px; align-items: flex-start; }
.info-line .icon-badge { width: 46px; height: 46px; margin: 0; flex: none; border-radius: var(--r-sm); box-shadow: none; }
.info-line b { display: block; font-size: 15.5px; color: var(--navy); margin-bottom: 2px; }
.info-line p, .info-line a { color: var(--ink-3); font-size: 14.5px; }
.info-line a:hover { color: var(--brand); }

/* ============================ 页脚 ============================ */
.site-footer { background: var(--navy); color: #93a5bd; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 48px; }
.footer-brand .brand-logo { filter: brightness(0) invert(1); opacity: .95; }
.footer-brand p { margin-top: 14px; font-size: 14px; line-height: 1.9; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col li { margin-bottom: 10px; font-size: 14px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); padding: 20px 0 24px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 13px; }
.footer-bottom a { color: #93a5bd; }
.footer-bottom a:hover { color: #fff; }

/* ============================ 滚动渐显 ============================ */
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
[data-reveal].is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee-track { animation: none; }
  .hero-ring { animation: none; display: none; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ============================ 响应式 ============================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-row, .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature-row.rev .feature-copy { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .nav-menu {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px; margin: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 14px 5vw 22px; box-shadow: 0 16px 32px -20px rgba(13, 33, 64, .3);
    transform: translateY(-130%); transition: transform .35s ease; z-index: -1;
  }
  .nav-menu.is-open { transform: none; }
  .nav-link { display: block; padding: 13px 14px; border-radius: var(--r-xs); }
  .nav-cta { margin: 10px 0 0; width: 100%; }
  .nav-burger { display: flex; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .hero-facts-dark { flex-wrap: wrap; }
  .hero-facts-dark .fact { flex: 1 1 40%; border-left: none; }
  .hero-dark h1 { letter-spacing: 1px; }
}
@media (max-width: 620px) {
  .section { padding: 68px 0; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .adv-list { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--header-h) + 48px); }
  .hero-banner { margin-top: 36px; }
  .hero-banner .media { aspect-ratio: 16 / 9; }
  .cta-card { padding: 52px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}