/* ============================================================
   NOLBIR 零壹讯 · 设计系统 v1.0
   风格：极简白（Apple 设计美学）· 全浅色
   主色 #185FA5 · 文字 #1d1d1f · 背景 #fff / #F5F5F7
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  --c-primary: #185FA5;
  --c-primary-dark: #124a82;
  --c-blue-2: #378ADD;
  --c-blue-3: #5B9CF6;
  --c-blue-soft: #E6F1FB;
  --c-blue-soft-2: #D8E9F9;
  --c-ink: #1d1d1f;
  --c-gray: #6e6e73;
  --c-gray-light: #86868b;
  --c-bg: #ffffff;
  --c-bg-gray: #F5F5F7;
  --c-border: rgba(0,0,0,.06);
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 980px;
  --shadow-hover: 0 20px 44px rgba(24,95,165,.10);
  --ease-spring: cubic-bezier(.22,1,.36,1);
  --nav-h: 52px;
}

/* ---------- Reset & Base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background: var(--c-bg); color: var(--c-ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--c-primary); color: #fff; }
a { color: inherit; }
img { max-width: 100%; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ---------- Logo ---------- */
.logo-img { display: block; object-fit: contain; image-rendering: -webkit-optimize-contrast; }
.logo-nav { width: 26px; height: 26px; }
.logo-engine { width: 76px; height: 76px; filter: drop-shadow(0 16px 44px rgba(24,95,165,.25)); }
.logo-foot { width: 30px; height: 30px; }

/* ---------- 导航（吸顶毛玻璃） ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 22px;
}
.nav .brand { display: flex; align-items: center; gap: 9px; font-size: 15px; font-weight: 600; letter-spacing: -.2px; text-decoration: none; }
.nav .links { display: flex; gap: 34px; font-size: 13px; color: #424245; }
.nav .links a { text-decoration: none; color: inherit; transition: color .2s; }
.nav .links a:hover, .nav .links a.active { color: var(--c-primary); }
.nav .cta {
  font-size: 12px; color: var(--c-primary); border: 1px solid rgba(24,95,165,.4);
  padding: 6px 15px; border-radius: var(--radius-pill); transition: all .25s; cursor: pointer;
  text-decoration: none; white-space: nowrap;
}
.nav .cta:hover { background: var(--c-primary); color: #fff; }
/* H5 菜单按钮 */
.nav .menu-btn {
  display: none; width: 38px; height: 38px; border: none; background: transparent;
  cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav .menu-btn span {
  width: 18px; height: 1.6px; background: var(--c-ink); border-radius: 2px;
  transition: transform .3s var(--ease-spring), opacity .2s;
}
.nav .menu-btn.open span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav .menu-btn.open span:nth-child(2) { opacity: 0; }
.nav .menu-btn.open span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }
.mobile-menu {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 99;
  background: rgba(255,255,255,.96); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
  padding: 12px 22px 22px; flex-direction: column; gap: 4px;
}
.mobile-menu a {
  text-decoration: none; color: var(--c-ink); font-size: 16px; font-weight: 500;
  padding: 12px 8px; border-radius: 12px; transition: background .2s;
}
.mobile-menu a:active, .mobile-menu a.active { background: var(--c-blue-soft); color: var(--c-primary); }
.mobile-menu.show { display: flex; animation: menuIn .28s var(--ease-spring); }
@keyframes menuIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 110px 22px 0; }
.hero .eyebrow {
  font-size: 13px; font-weight: 600; color: var(--c-primary); letter-spacing: 3px;
  text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(44px, 6.5vw, 76px); font-weight: 700;
  letter-spacing: -2.5px; line-height: 1.05;
}
.hero h1 .grad {
  background: linear-gradient(95deg, #185FA5 10%, #378ADD 55%, #5B9CF6 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub { margin: 24px auto 0; max-width: 560px; font-size: 19px; color: var(--c-gray); line-height: 1.55; }
.hero .actions { margin-top: 34px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- 按钮 ---------- */
.btn-primary {
  background: var(--c-primary); color: #fff; font-size: 15px; font-weight: 500;
  padding: 14px 32px; border-radius: var(--radius-pill); transition: all .25s; cursor: pointer;
  border: none; text-decoration: none; display: inline-block;
}
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(24,95,165,.3); }
.btn-text {
  font-size: 15px; color: var(--c-primary); display: inline-flex; align-items: center; gap: 6px;
  padding: 14px 8px; cursor: pointer; text-decoration: none; background: none; border: none; font-family: inherit;
}
.btn-text:hover { text-decoration: underline; }
.btn-white {
  display: inline-block; background: #fff; color: var(--c-primary);
  font-size: 15px; font-weight: 600; padding: 15px 36px; border-radius: var(--radius-pill);
  transition: transform .25s, box-shadow .25s; cursor: pointer; text-decoration: none; border: none;
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0,0,0,.2); }

/* ---------- 引擎视觉区（浅蓝） ---------- */
.engine {
  margin: 72px auto 0; max-width: 980px;
  background: linear-gradient(180deg, #EDF5FD 0%, #E2EEFA 100%);
  border: 1px solid rgba(24,95,165,.10);
  border-radius: 28px; padding: 64px 48px 0;
  position: relative; overflow: hidden;
}
.engine::before {
  content: "0101 110 01001 1010 010 1101 00101 010 1110 010 1001 1101 010 0110 100 1011 010 1100 1001 010 110 1011 00101 0101 011 0100 101 1101 0010 0101 101 1100 0101 0110 100 1101 0101 001 1010 011 0100";
  position: absolute; inset: 0; padding: 40px;
  font-family: "SF Mono", Menlo, monospace; font-size: 13px; line-height: 2.2;
  color: rgba(24,95,165,.08); letter-spacing: 4px; overflow: hidden;
  pointer-events: none;
}
.engine .glow {
  position: absolute; width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(circle, rgba(133,183,235,.45), transparent 65%);
  top: -220px; left: 50%; transform: translateX(-50%);
}
.engine-inner { position: relative; text-align: center; }
.engine .mark { width: 76px; height: 76px; margin: 0 auto 26px; display: flex; align-items: center; justify-content: center; }
.engine h2 { color: var(--c-ink); font-size: clamp(26px, 3.4vw, 38px); font-weight: 700; letter-spacing: -1px; }
.engine h2 span { color: var(--c-primary); }
.engine p { color: var(--c-gray); font-size: 16px; margin-top: 14px; }
.engine .metrics {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
  margin: 44px auto 0; max-width: 720px;
}
.engine .metric {
  background: rgba(255,255,255,.85); border: 1px solid rgba(24,95,165,.10);
  border-radius: 18px; padding: 22px 16px; backdrop-filter: blur(8px);
}
.engine .metric b { display: block; color: var(--c-ink); font-size: 26px; font-weight: 700; letter-spacing: -.5px; }
.engine .metric b em { font-style: normal; color: var(--c-primary); }
.engine .metric span { display: block; margin-top: 6px; color: var(--c-gray); font-size: 12px; }

/* ---------- 区块标题 ---------- */
.section { padding: 110px 0 0; }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .kicker { font-size: 13px; font-weight: 600; color: var(--c-primary); letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 14px; }
.sec-head h2 { font-size: clamp(30px, 4vw, 46px); font-weight: 700; letter-spacing: -1.5px; line-height: 1.12; }
.sec-head p { margin: 18px auto 0; max-width: 520px; color: var(--c-gray); font-size: 17px; line-height: 1.6; }

/* ---------- Bento 服务网格 ---------- */
.bento { display: grid; gap: 16px; grid-template-columns: repeat(6, 1fr); }
.b-card {
  background: var(--c-bg-gray); border-radius: var(--radius-lg); padding: 34px 30px;
  position: relative; overflow: hidden; transition: transform .3s, box-shadow .3s;
  display: flex; flex-direction: column; text-decoration: none; color: inherit;
}
.b-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.b-card .no { font-family: "SF Mono", Menlo, monospace; font-size: 12px; color: var(--c-gray-light); letter-spacing: 2px; }
.b-card h3 { font-size: 24px; font-weight: 700; letter-spacing: -.6px; margin-top: 12px; }
.b-card p { color: var(--c-gray); font-size: 14.5px; line-height: 1.65; margin-top: 10px; max-width: 400px; }
.b-card .tags { margin-top: auto; display: flex; gap: 8px; flex-wrap: wrap; padding-top: 20px; }
.b-card .tags i {
  font-style: normal; font-size: 11.5px; color: #424245;
  background: rgba(0,0,0,.05); padding: 5px 12px; border-radius: var(--radius-pill);
}
.b-large { grid-column: span 4; }
.b-small { grid-column: span 2; }
.b-card.soft-blue {
  background: linear-gradient(150deg, #E6F1FB 0%, #D8E9F9 100%);
  border: 1px solid rgba(24,95,165,.12);
}
.b-card.soft-blue .tags i { background: rgba(24,95,165,.10); color: #2a5e8f; }
.b-large .split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: center; flex: 1; }
.b-large .art { display: flex; justify-content: center; }
.b-small .art { margin: 18px 0 4px; display: flex; justify-content: flex-start; }
.b-small.art-top { padding-top: 30px; }
.b-small.art-top .art { justify-content: center; margin-bottom: 18px; }

/* ---------- 数据带 ---------- */
.stats-band { margin-top: 110px; background: var(--c-bg-gray); padding: 72px 22px; }
.stats { max-width: 1080px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat b { font-size: clamp(36px, 4.4vw, 52px); font-weight: 700; letter-spacing: -2px; color: var(--c-ink); }
.stat b em { font-style: normal; color: var(--c-primary); }
.stat span { display: block; margin-top: 8px; color: var(--c-gray); font-size: 14px; }

/* ---------- 案例：交替式 ---------- */
.case { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 64px 0; }
.case + .case { border-top: 1px solid rgba(0,0,0,.05); }
.case .visual {
  aspect-ratio: 4/3; border-radius: var(--radius-lg); position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.case .v1 { background: linear-gradient(140deg, #DCEBFA, #C3DCF5); }
.case .v2 { background: linear-gradient(140deg, #E8F0FA, #E6F1FB); }
.case .v3 { background: linear-gradient(140deg, #D4E6F8, #BFD9F2); }
.case .info .cat { font-size: 12px; font-weight: 600; color: var(--c-primary); letter-spacing: 2px; text-transform: uppercase; }
.case .info h3 { font-size: 30px; font-weight: 700; letter-spacing: -1px; margin-top: 12px; line-height: 1.2; }
.case .info p { color: var(--c-gray); font-size: 15.5px; line-height: 1.7; margin-top: 14px; max-width: 440px; }
.case .info ul { margin-top: 20px; list-style: none; }
.case .info li { font-size: 14px; color: #424245; padding: 7px 0 7px 24px; position: relative; }
.case .info li::before { content: "→"; position: absolute; left: 0; color: var(--c-primary); font-weight: 600; }
.case .info li b { font-weight: 600; color: var(--c-primary); }

/* ---------- 流程 ---------- */
.process { margin-top: 110px; background: var(--c-bg-gray); padding: 100px 22px; }
.steps { max-width: 1080px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.step {
  background: #fff; border-radius: 20px; padding: 28px 24px; border: 1px solid rgba(0,0,0,.04);
  border-top: 3px solid var(--c-primary); transition: transform .3s, box-shadow .3s;
}
.step:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(24,95,165,.10); }
.step .n { font-family: "SF Mono", Menlo, monospace; font-size: 12px; color: var(--c-primary); letter-spacing: 2px; }
.step h4 { color: var(--c-ink); font-size: 18px; font-weight: 600; margin-top: 12px; letter-spacing: -.3px; }
.step p { color: var(--c-gray); font-size: 13.5px; line-height: 1.7; margin-top: 10px; }

/* ---------- CTA 横幅 ---------- */
.cta-section { padding: 110px 22px 0; }
.cta-banner {
  max-width: 1080px; margin: 0 auto;
  background: linear-gradient(120deg, #185FA5 0%, #378ADD 62%, #5B9CF6 110%);
  border-radius: var(--radius-xl); padding: 88px 48px; text-align: center; position: relative; overflow: hidden;
}
.cta-banner::after {
  content: ""; position: absolute; width: 500px; height: 500px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.22); right: -180px; top: -180px;
}
.cta-banner::before {
  content: ""; position: absolute; width: 320px; height: 320px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.18); right: -60px; top: -60px;
}
.cta-banner h2 { color: #fff; font-size: clamp(28px, 4vw, 44px); font-weight: 700; letter-spacing: -1.5px; line-height: 1.15; position: relative; }
.cta-banner p { color: rgba(255,255,255,.85); font-size: 17px; margin-top: 16px; position: relative; }
.cta-banner .btn-white { margin-top: 32px; position: relative; }

/* ---------- 页脚 ---------- */
footer { margin-top: 110px; border-top: 1px solid rgba(0,0,0,.08); padding: 56px 22px 40px; background: var(--c-bg-gray); }
.foot-grid { max-width: 1080px; margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.foot-brand .brand { display: flex; align-items: center; gap: 9px; font-size: 16px; font-weight: 700; }
.foot-brand p { margin-top: 16px; color: var(--c-gray); font-size: 13.5px; line-height: 1.7; max-width: 300px; }
.foot-col h5 { font-size: 12px; font-weight: 600; color: var(--c-ink); letter-spacing: 1px; margin-bottom: 14px; }
.foot-col a { display: block; color: var(--c-gray); font-size: 13px; text-decoration: none; padding: 5px 0; }
.foot-col a:hover { color: var(--c-primary); }
.foot-bottom {
  max-width: 1080px; margin: 40px auto 0; padding-top: 22px;
  border-top: 1px solid rgba(0,0,0,.07);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 12px; color: var(--c-gray-light);
}
.foot-bottom a { color: inherit; text-decoration: none; }
.foot-bottom a:hover { color: var(--c-primary); }

/* ============ 内页组件 ============ */

/* 内页 Hero */
.page-hero { text-align: center; padding: 96px 22px 0; }
.page-hero .eyebrow { font-size: 13px; font-weight: 600; color: var(--c-primary); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 16px; }
.page-hero h1 { font-size: clamp(36px, 5vw, 60px); font-weight: 700; letter-spacing: -2px; line-height: 1.08; }
.page-hero p { margin: 20px auto 0; max-width: 560px; color: var(--c-gray); font-size: 17px; line-height: 1.6; }

/* 品牌理念 0/1 */
.brand-story { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.brand-story .big01 {
  aspect-ratio: 1; border-radius: var(--radius-xl);
  background: linear-gradient(160deg, #EDF5FD, #D8E9F9);
  display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden;
}
.brand-story .big01 img {
  width: 62%; max-width: 300px; object-fit: contain;
  filter: drop-shadow(0 24px 48px rgba(24,95,165,.28));
  animation: big01Float 6s ease-in-out infinite;
}
@keyframes big01Float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.brand-story h3 { font-size: 30px; font-weight: 700; letter-spacing: -1px; line-height: 1.25; }
.brand-story h3 span { color: var(--c-primary); }
.brand-story p { color: var(--c-gray); font-size: 16px; line-height: 1.75; margin-top: 16px; }

/* 时间线 */
.timeline { position: relative; max-width: 680px; margin: 0 auto; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(#185FA5, #D8E9F9); border-radius: 2px; }
.tl-item { position: relative; padding: 0 0 40px 24px; }
.tl-item::before {
  content: ""; position: absolute; left: -28px; top: 6px; width: 14px; height: 14px;
  border-radius: 50%; background: #fff; border: 3px solid var(--c-primary);
  box-shadow: 0 0 0 4px rgba(24,95,165,.12);
}
.tl-item .date { font-family: "SF Mono", Menlo, monospace; font-size: 13px; color: var(--c-primary); font-weight: 600; letter-spacing: 1px; }
.tl-item h4 { font-size: 19px; font-weight: 600; margin-top: 6px; letter-spacing: -.3px; }
.tl-item p { color: var(--c-gray); font-size: 14.5px; line-height: 1.7; margin-top: 8px; }

/* 价值观卡片 */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.value-card {
  background: var(--c-bg-gray); border-radius: var(--radius-lg); padding: 34px 28px;
  transition: transform .3s, box-shadow .3s;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.value-card .icon {
  width: 46px; height: 46px; border-radius: 14px;
  background: linear-gradient(140deg, #E6F1FB, #D8E9F9);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.value-card h4 { font-size: 19px; font-weight: 600; letter-spacing: -.3px; }
.value-card p { color: var(--c-gray); font-size: 14px; line-height: 1.7; margin-top: 10px; }

/* 团队 */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.member {
  background: var(--c-bg-gray); border-radius: var(--radius-lg); padding: 30px 22px;
  text-align: center; transition: transform .3s, box-shadow .3s;
}
.member:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.member .avatar {
  width: 72px; height: 72px; border-radius: 50%; margin: 0 auto;
  background: linear-gradient(140deg, #E6F1FB, #C3DCF5);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 700; color: var(--c-primary);
  overflow: hidden;
}
.member .avatar img {
  width: 100%; height: 100%; object-fit: cover;
  display: block; border-radius: inherit;
}
.member h4 { font-size: 17px; font-weight: 600; margin-top: 16px; }
.member .role { font-size: 12.5px; color: var(--c-primary); margin-top: 4px; font-weight: 500; }
.member p { font-size: 13px; color: var(--c-gray); line-height: 1.6; margin-top: 10px; }

/* 服务详情块（产品页） */
.service-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 72px 0;
}
.service-detail + .service-detail { border-top: 1px solid rgba(0,0,0,.05); }
.service-detail .no { font-family: "SF Mono", Menlo, monospace; font-size: 13px; color: var(--c-primary); letter-spacing: 3px; font-weight: 600; }
.service-detail h3 { font-size: 32px; font-weight: 700; letter-spacing: -1px; margin-top: 10px; }
.service-detail .desc { color: var(--c-gray); font-size: 16px; line-height: 1.75; margin-top: 14px; }
.service-detail ul { margin-top: 22px; list-style: none; }
.service-detail li { font-size: 14.5px; color: #424245; padding: 8px 0 8px 26px; position: relative; }
.service-detail li::before { content: "✓"; position: absolute; left: 0; color: var(--c-primary); font-weight: 700; }
.service-detail .visual {
  aspect-ratio: 4/3; border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, #E8F0FA, #D8E9F9); border: 1px solid rgba(24,95,165,.10);
  overflow: hidden;
}
.service-detail .visual svg { width: 100%; height: 100%; display: block; }

/* 筛选标签 */
.filter-tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.filter-tabs button {
  border: 1px solid rgba(0,0,0,.10); background: #fff; color: #424245;
  font-size: 13.5px; padding: 9px 22px; border-radius: var(--radius-pill);
  cursor: pointer; transition: all .25s; font-family: inherit;
}
.filter-tabs button:hover { border-color: rgba(24,95,165,.4); color: var(--c-primary); }
.filter-tabs button.active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* 案例网格（产品页） */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card {
  background: #fff; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid rgba(0,0,0,.05); transition: transform .3s, box-shadow .3s;
}
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.case-card .cover { aspect-ratio: 16/10; display: flex; align-items: center; justify-content: center; }
.case-card .cover.c1 { background: linear-gradient(140deg, #DCEBFA, #C3DCF5); }
.case-card .cover.c2 { background: linear-gradient(140deg, #E8F0FA, #E6F1FB); }
.case-card .cover.c3 { background: linear-gradient(140deg, #D4E6F8, #BFD9F2); }
.case-card .cover svg { width: 100%; height: 100%; display: block; }
.case-card .body { padding: 24px 22px; }
.case-card .cat { font-size: 11.5px; font-weight: 600; color: var(--c-primary); letter-spacing: 1.5px; text-transform: uppercase; }
.case-card h4 { font-size: 19px; font-weight: 600; letter-spacing: -.3px; margin-top: 8px; }
.case-card p { color: var(--c-gray); font-size: 13.5px; line-height: 1.65; margin-top: 8px; }

/* 联系表单 */
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
.form-card {
  background: #fff; border-radius: var(--radius-xl); padding: 44px 40px;
  border: 1px solid rgba(0,0,0,.06); box-shadow: 0 12px 40px rgba(24,95,165,.06);
}
.form-card h3 { font-size: 24px; font-weight: 700; letter-spacing: -.5px; }
.form-card .hint { color: var(--c-gray); font-size: 14px; margin-top: 8px; }
.field { margin-top: 24px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: #424245; margin-bottom: 8px; }
.field label em { color: #e0504a; font-style: normal; margin-left: 2px; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid rgba(0,0,0,.12); border-radius: 14px;
  padding: 13px 16px; font-size: 15px; font-family: inherit; color: var(--c-ink);
  background: #FAFAFC; transition: border-color .2s, box-shadow .2s; outline: none;
  -webkit-appearance: none; appearance: none;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--c-primary); box-shadow: 0 0 0 4px rgba(24,95,165,.10); background: #fff;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-msg { margin-top: 18px; font-size: 14px; display: none; padding: 12px 16px; border-radius: 12px; }
.form-msg.ok { display: block; background: #E8F7EE; color: #1c7c46; }
.form-msg.err { display: block; background: #FDECEC; color: #c2403a; }

/* 联系信息卡 */
.info-card {
  background: var(--c-bg-gray); border-radius: var(--radius-xl); padding: 36px 32px;
}
.info-card + .info-card { margin-top: 16px; }
.info-card h4 { font-size: 17px; font-weight: 600; display: flex; align-items: center; gap: 10px; }
.info-card h4 .icon {
  width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0;
  background: linear-gradient(140deg, #E6F1FB, #D8E9F9);
  display: flex; align-items: center; justify-content: center;
}
.info-card ul { list-style: none; margin-top: 16px; }
.info-card li { font-size: 14px; color: var(--c-gray); padding: 7px 0; line-height: 1.6; }
.info-card li b { color: var(--c-ink); font-weight: 600; }

/* ---------- 动画：滚动揭示 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease-spring), transform .8s var(--ease-spring); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .1s; }
.reveal-d2 { transition-delay: .2s; }
.reveal-d3 { transition-delay: .3s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 32px; left: 50%; transform: translate(-50%, 20px);
  background: var(--c-ink); color: #fff; font-size: 14px;
  padding: 13px 26px; border-radius: var(--radius-pill); z-index: 200;
  opacity: 0; pointer-events: none; transition: all .35s var(--ease-spring);
  box-shadow: 0 12px 32px rgba(0,0,0,.18);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .nav .links, .nav .cta { display: none; }
  .nav .menu-btn { display: flex; }
  .bento { grid-template-columns: 1fr 1fr; }
  .b-large, .b-small { grid-column: span 2; }
  .b-large .split { grid-template-columns: 1fr; gap: 16px; }
  .case, .service-detail { grid-template-columns: 1fr; gap: 24px; }
  .stats { grid-template-columns: 1fr 1fr; gap: 36px; }
  .steps { grid-template-columns: 1fr 1fr; gap: 16px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .engine { margin: 56px 16px 0; padding: 48px 24px 0; }
  .engine .metrics { grid-template-columns: 1fr; }
  .cta-banner { padding: 56px 24px; }
  .section { padding-top: 72px; }
  .brand-story, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .values-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .case-grid { grid-template-columns: 1fr 1fr; }
  .form-card { padding: 30px 22px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .service-detail .visual { order: -1; }
}
@media (max-width: 560px) {
  .bento { grid-template-columns: 1fr; }
  .b-large, .b-small { grid-column: span 1; }
  .stats { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .case-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 72px; }
  .page-hero { padding-top: 64px; }
}