/* ============================================================
   希晨科技 XICHEN TECH — 官网样式表
   深色科技风 / 青蓝主色 / 中等动效
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --bg: #0e1522;
  --bg-soft: #131b28;
  --bg-elev: #1a2433;
  --surface: rgba(255, 255, 255, 0.055);
  --surface-2: rgba(255, 255, 255, 0.09);
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.24);

  --text: #f3f7fd;
  --text-2: #d8e0ee;
  --muted: #a8b5c9;
  --dim: #808da0;

  --primary: #22d3ee;
  --primary-2: #38bdf8;
  --primary-3: #6366f1;
  --primary-ink: #041016;
  --grad: linear-gradient(120deg, #22d3ee 0%, #38bdf8 45%, #7c8cff 100%);
  --grad-soft: linear-gradient(160deg, rgba(34, 211, 238, 0.14), rgba(99, 102, 241, 0.05));

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 22px 60px -26px rgba(34, 211, 238, 0.45);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC",
    sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 0.68, 0.35, 1);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: rgba(34, 211, 238, 0.28); color: #fff; }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #0e1522; }
::-webkit-scrollbar-thumb {
  background: #2c374a;
  border-radius: 8px;
  border: 2px solid #0e1522;
}
::-webkit-scrollbar-thumb:hover { background: #27354a; }

/* ---------- 3. 背景氛围层 ---------- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-fx::before {
  content: "";
  position: absolute;
  inset: -10%;
  background-image: linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 0%, transparent 78%);
  mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 0%, transparent 78%);
  opacity: 0.75;
}

.bg-fx .glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  will-change: transform;
}

.bg-fx .g1 {
  width: 620px; height: 620px;
  top: -280px; left: 50%;
  margin-left: -310px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.4), transparent 68%);
  animation: float1 18s var(--ease) infinite alternate;
}

.bg-fx .g2 {
  width: 520px; height: 520px;
  top: 30vh; right: -220px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.32), transparent 68%);
  animation: float2 24s var(--ease) infinite alternate;
}

.bg-fx .g3 {
  width: 460px; height: 460px;
  bottom: 8vh; left: -200px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22), transparent 68%);
  animation: float1 28s var(--ease) infinite alternate-reverse;
}

@keyframes float1 {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(60px, 50px, 0) scale(1.14); }
}
@keyframes float2 {
  from { transform: translate3d(0, 0, 0) scale(1.05); }
  to { transform: translate3d(-70px, -40px, 0) scale(0.94); }
}

/* ---------- 4. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.container-wide { max-width: 1320px; }
.container-narrow { max-width: 820px; }

main { position: relative; z-index: 1; }

.section { padding: 104px 0; position: relative; }
.section-sm { padding: 68px 0; }
.section-tight { padding: 56px 0 104px; }
.section-line { border-top: 1px solid var(--line); }

.bg-soft { background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.018) 40%, transparent); }

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stack-sm > * + * { margin-top: 12px; }
.center { text-align: center; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; } .mt-40 { margin-top: 40px; } .mt-56 { margin-top: 56px; }
.mt-72 { margin-top: 72px; }

/* ---------- 5. 排版 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--primary);
  opacity: 0.7;
}

.h1 {
  font-size: clamp(38px, 5.6vw, 68px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.025em;
}
.h3 { font-size: clamp(20px, 2vw, 26px); }
.h4 { font-size: 19px; font-weight: 700; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.lead {
  font-size: clamp(16px, 1.35vw, 18.5px);
  line-height: 1.85;
  color: var(--muted);
}

.section-head { max-width: 760px; }
.section-head.center { margin: 0 auto; }
.section-head .lead { margin-top: 18px; }

.muted { color: var(--muted); }
.dim { color: var(--dim); }
.small { font-size: 13.5px; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease),
    background 0.28s var(--ease), border-color 0.28s var(--ease), color 0.2s;
}
.btn svg { width: 16px; height: 16px; flex: none; transition: transform 0.28s var(--ease); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow: 0 12px 30px -12px rgba(34, 211, 238, 0.6);
}
.btn-primary:hover {
  background: #4ddcf2;
  transform: translateY(-2px);
  box-shadow: 0 20px 44px -14px rgba(34, 211, 238, 0.75);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.062);
  border-color: var(--line-strong);
  color: var(--text);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(34, 211, 238, 0.5);
  transform: translateY(-2px);
}

.btn-line {
  background: transparent;
  border-color: rgba(34, 211, 238, 0.4);
  color: var(--primary);
}
.btn-line:hover { background: rgba(34, 211, 238, 0.1); border-color: var(--primary); }

.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--primary);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
.btn-text svg { width: 15px; height: 15px; transition: transform 0.3s var(--ease); }
.btn-text:hover svg { transform: translateX(4px); }

/* ---------- 7. 导航 ---------- */
/* 站内公告条：后台「站点设置-站内公告」有内容时显示（底部悬浮，不占布局） */
.site-notice {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 95;
  max-width: min(92vw, 720px);
  background: rgba(14, 27, 42, 0.96);
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: 999px;
  padding: 9px 22px;
  font-size: 13px;
  color: #cdeef8;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.4);
  text-align: center;
}
.site-notice[hidden] { display: none; }

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 90;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease),
    backdrop-filter 0.35s, height 0.35s var(--ease);
}
.site-nav.scrolled {
  background: rgba(14, 21, 34, 0.84);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
}
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--grad);
  box-shadow: 0 8px 22px -10px rgba(34, 211, 238, 0.8);
  color: #041016;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.04em;
  flex: none;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-text small {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--dim);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  position: relative;
  padding: 9px 14px;
  font-size: 14.5px;
  color: var(--text-2);
  border-radius: 8px;
  transition: color 0.24s, background 0.24s;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.075); }
.nav-links a.active { color: var(--primary); font-weight: 600; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  opacity: 0.85;
}

.nav-cta { display: flex; align-items: center; gap: 14px; flex: none; }
.nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.04em;
  transition: color 0.24s;
}
.nav-phone svg { width: 15px; height: 15px; color: var(--primary); }
.nav-phone:hover { color: var(--primary); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.062);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}
.nav-toggle span {
  width: 17px; height: 1.6px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ---------- 7.1 业务总览下拉 ---------- */
.nav-item { position: relative; }
.nav-item > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-item .caret {
  width: 12px; height: 12px;
  opacity: 0.65;
  transition: transform 0.3s var(--ease), opacity 0.24s;
}
.nav-item:hover > a .caret,
.nav-item:focus-within > a .caret { transform: rotate(180deg); opacity: 1; }

.nav-drop {
  position: absolute;
  top: 100%;
  left: 50%;
  width: max-content;
  display: flex;
  align-items: stretch;
  gap: 2px;
  margin-top: 10px;
  padding: 8px;
  border-radius: 16px;
  background: rgba(23, 33, 48, 0.97);
  backdrop-filter: blur(24px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: 0 26px 64px -20px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease), visibility 0.26s;
  z-index: 6;
}
/* 悬浮桥接区：鼠标从主链接移向下拉时不中断 */
.nav-drop::before {
  content: "";
  position: absolute;
  top: -12px; left: 0; right: 0;
  height: 12px;
}
.nav-item:hover .nav-drop,
.nav-item:focus-within .nav-drop,
.nav-item.open .nav-drop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.nav-drop a {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  width: 158px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-2);
}
.nav-drop a:hover { background: rgba(255, 255, 255, 0.075); color: #fff; }
.nav-drop a svg {
  width: 18px; height: 18px;
  color: var(--primary);
  flex: none;
}
.nav-drop .dt { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.nav-drop .dt strong { font-size: 14px; font-weight: 600; color: var(--text); letter-spacing: 0.01em; white-space: nowrap; }
.nav-drop a:hover .dt strong { color: #fff; }
.nav-drop .dt small { font-size: 11.5px; color: var(--dim); line-height: 1.5; }

/* ---------- 8. Hero ---------- */
.hero {
  padding: calc(var(--nav-h) + 92px) 0 88px;
  position: relative;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px 7px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(34, 211, 238, 0.28);
  background: rgba(34, 211, 238, 0.07);
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 30px;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.15);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.18); }
  50% { box-shadow: 0 0 0 7px rgba(34, 211, 238, 0.04); }
}

.hero .h1 { margin: 0 auto; max-width: 15em; }
.hero .lead { max-width: 640px; margin: 26px auto 0; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 38px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 26px;
  margin-top: 26px;
  font-size: 13.5px;
  color: var(--muted);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta svg { width: 14px; height: 14px; color: var(--primary); }

/* 数据条 */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin-top: 76px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}
.stat {
  background: rgba(23, 33, 48, 0.88);
  padding: 26px 20px;
  text-align: center;
  backdrop-filter: blur(6px);
}
.stat-num {
  font-size: clamp(26px, 2.7vw, 34px);
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: #fff;
}
.stat-num .unit { font-size: 0.52em; font-weight: 600; color: var(--primary); margin-left: 3px; letter-spacing: 0; }
.stat-label { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* ---------- 9. 跑马灯 ---------- */
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 15px 0;
  background: rgba(255, 255, 255, 0.014);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: scroll-x 42s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 0 24px;
  font-size: 14px;
  color: var(--dim);
  white-space: nowrap;
  letter-spacing: 0.04em;
}
.marquee-track span::after {
  content: "";
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.5);
}
@keyframes scroll-x {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 10. 卡片 ---------- */
.card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.028));
  overflow: hidden;
  transition: transform 0.38s var(--ease), border-color 0.38s var(--ease),
    box-shadow 0.38s var(--ease);
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    340px circle at var(--mx, 50%) var(--my, 0%),
    rgba(34, 211, 238, 0.16),
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(34, 211, 238, 0.34);
  box-shadow: var(--shadow-glow);
}
.card:hover::after { opacity: 1; }
.card > * { position: relative; z-index: 1; }

.card-icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.22);
  color: var(--primary);
  margin-bottom: 20px;
}
.card-icon svg { width: 22px; height: 22px; }

.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--muted); line-height: 1.8; }

.card-num {
  position: absolute;
  top: 20px; right: 24px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.14);
  letter-spacing: 0.06em;
  z-index: 1;
}

/* 业务大卡（首页业务矩阵） */
.biz-card {
  display: flex;
  flex-direction: column;
  padding: 30px 28px 26px;
}
.biz-card .biz-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}
.biz-title {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.biz-title em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  background: rgba(34, 211, 238, 0.12);
  border-radius: 5px;
  padding: 3px 6px;
  letter-spacing: 0.05em;
}
.biz-sub { font-size: 13.5px; color: var(--muted); margin-bottom: 20px; line-height: 1.7; }
.biz-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 14px;
  padding-top: 20px;
  margin-top: auto;
  border-top: 1px dashed var(--line);
}
.biz-list li {
  font-size: 13.2px;
  color: var(--text-2);
  display: flex;
  align-items: flex-start;
  gap: 7px;
  line-height: 1.6;
}
.biz-list li::before {
  content: "";
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.75);
  margin-top: 8px;
  flex: none;
}

/* 痛点卡 */
.pain-card { padding: 24px 26px; }
.pain-card .q {
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.18);
  margin-bottom: 10px;
  letter-spacing: 0.08em;
}
.pain-card h3 { font-size: 17px; margin-bottom: 8px; color: #fff; }
.pain-card p { font-size: 14px; }

/* 案例卡 */
.case-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}
.case-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(150deg, #1a2536, #16202f 55%, #21304a);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.case-thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.062) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.062) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.65;
  transition: opacity 0.4s;
}
.case-thumb::after {
  content: "";
  position: absolute;
  width: 180px; height: 180px;
  right: -50px; top: -50px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.3), transparent 68%);
  filter: blur(24px);
  transition: transform 0.6s var(--ease);
}
.case-card:hover .case-thumb::after { transform: scale(1.35); }
.case-thumb .thumb-label {
  position: absolute;
  left: 22px; bottom: 20px;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: rgba(255, 255, 255, 0.9);
  z-index: 1;
  line-height: 1.1;
}
.case-thumb .thumb-label small {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--primary);
  margin-top: 6px;
  text-transform: uppercase;
}
.case-thumb .thumb-tag {
  position: absolute;
  top: 16px; left: 18px;
  z-index: 1;
}
.case-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 17.5px; margin-bottom: 9px; letter-spacing: -0.015em; }
.case-body p { font-size: 13.5px; color: var(--muted); flex: 1; }
.case-kpi {
  display: flex;
  gap: 22px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}
.case-kpi div strong {
  display: block;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.case-kpi div span { font-size: 11.5px; color: var(--dim); }

/* ---------- 11. 标签 / 徽章 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.075);
  color: var(--text-2);
  white-space: nowrap;
}
.tag-cyan {
  border-color: rgba(34, 211, 238, 0.32);
  background: rgba(34, 211, 238, 0.1);
  color: var(--primary);
}
.tag-violet {
  border-color: rgba(124, 140, 255, 0.32);
  background: rgba(99, 102, 241, 0.12);
  color: #a5b4fc;
}
.tag-solid {
  background: rgba(34, 211, 238, 0.9);
  border-color: transparent;
  color: #041016;
}

/* ---------- 12. 流程 ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  margin-top: 56px;
  border-top: 1px solid var(--line);
}
.step {
  position: relative;
  padding: 30px 22px 0 0;
}
.step::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: 100%;
  height: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.9s var(--ease);
}
.step.in::before { transform: scaleX(1); }
.step-index {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  display: block;
}
.step h3 { font-size: 16.5px; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--muted); line-height: 1.75; }
.step .dot-mark {
  position: absolute;
  top: -3.5px; left: 0;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12);
}

/* ---------- 13. 数据展示带 ---------- */
.metric-band {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--grad-soft);
  padding: 48px 40px;
  overflow: hidden;
}
.metric-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.075) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 30% 20%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 30% 20%, #000, transparent 75%);
  pointer-events: none;
}
.metric-band .grid { position: relative; z-index: 1; }

/* ---------- 14. 评价 ---------- */
.quote {
  display: flex;
  flex-direction: column;
  padding: 28px;
}
.quote-mark {
  font-family: Georgia, serif;
  font-size: 46px;
  line-height: 0.7;
  color: rgba(34, 211, 238, 0.35);
  margin-bottom: 14px;
}
.quote p { font-size: 15px; line-height: 1.85; color: var(--text-2); flex: 1; }
.quote-who {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-ink);
  background: var(--grad);
  flex: none;
}
.quote-who strong { display: block; font-size: 14px; }
.quote-who span { font-size: 12.5px; color: var(--dim); }

/* ---------- 15. 手风琴 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: 24px 4px;
  background: none;
  border: 0;
  color: var(--text);
  font-size: 16.5px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: color 0.24s;
}
.faq-q:hover { color: var(--primary); }
.faq-icon {
  position: relative;
  width: 18px; height: 18px;
  flex: none;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%; left: 0;
  width: 100%; height: 1.6px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform 0.35s var(--ease);
}
.faq-icon::after { transform: rotate(90deg); }
.faq-item.open .faq-icon::after { transform: rotate(0deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.42s var(--ease);
}
.faq-a p {
  padding: 0 40px 26px 4px;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.9;
}

/* ---------- 16. 表单 ---------- */
.form-card {
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.032));
  backdrop-filter: blur(10px);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.02em;
}
.field label .req { color: var(--primary); margin-left: 3px; }

.input,
.select,
.textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: rgba(0, 0, 0, 0.2);
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.5;
  transition: border-color 0.24s, box-shadow 0.24s, background 0.24s;
  appearance: none;
}
.input::placeholder,
.textarea::placeholder { color: #55606f; }
.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(34, 211, 238, 0.05);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
}
.textarea { resize: vertical; min-height: 104px; }
.select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%238b9ab0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
  cursor: pointer;
}
.select option { background: #1a2433; color: var(--text); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.075);
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
  transition: all 0.24s var(--ease);
}
.chip:hover { border-color: rgba(34, 211, 238, 0.4); color: #fff; }
.chip.on {
  background: rgba(34, 211, 238, 0.14);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}
.chip input { display: none; }

.field-error {
  font-size: 12.5px;
  color: #ff8b8b;
  display: none;
}

/* 留言类型说明文字 */
.field-tip {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.6;
}
.field.invalid .input,
.field.invalid .textarea,
.field.invalid .select { border-color: #ff8b8b; }
.field.invalid .field-error { display: block; }

.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.form-note { font-size: 12.5px; color: var(--dim); display: flex; align-items: center; gap: 7px; }
.form-note svg { width: 14px; height: 14px; color: var(--primary); }

.form-success {
  display: none;
  text-align: center;
  padding: 44px 24px;
}
.form-success.show { display: block; animation: fadeUp 0.5s var(--ease); }
.form-success .ok-mark {
  width: 62px; height: 62px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--primary);
}
.form-success h3 { font-size: 21px; margin-bottom: 10px; }
.form-success p { font-size: 14.5px; color: var(--muted); max-width: 400px; margin: 0 auto; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 17. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.032), transparent);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 28px 24px;
  padding-bottom: 52px;
}
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { font-size: 13.5px; color: var(--muted); line-height: 1.9; max-width: 320px; }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 22px;
  font-size: 13.5px;
}
.footer-contact a { color: var(--text-2); transition: color 0.22s; }
.footer-contact a:hover { color: var(--primary); }
.footer-contact .big {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a {
  font-size: 13.5px;
  color: var(--muted);
  transition: color 0.22s, transform 0.22s;
  display: inline-block;
}
.footer-col a:hover { color: var(--primary); transform: translateX(3px); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12.5px;
  color: var(--dim);
}
.footer-bottom .links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-bottom a:hover { color: var(--text-2); }
.footer-bottom .icp-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 18. 悬浮联系 ---------- */
.float-bar {
  position: fixed;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  position: relative;
  width: 52px; height: 52px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: rgba(26, 36, 51, 0.92);
  backdrop-filter: blur(12px);
  color: var(--text-2);
  cursor: pointer;
  box-shadow: 0 12px 30px -16px rgba(0, 0, 0, 0.55);
  transition: all 0.3s var(--ease);
}
.float-btn svg { width: 20px; height: 20px; }
.float-btn:hover,
.float-btn.primary {
  color: var(--primary);
  border-color: rgba(34, 211, 238, 0.5);
  background: rgba(34, 211, 238, 0.1);
  transform: translateX(-3px);
}
.float-btn .tip {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  padding: 5px 11px;
  border-radius: 7px;
  background: rgba(26, 36, 51, 0.97);
  border: 1px solid var(--line-strong);
  font-size: 12.5px;
  color: var(--text);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.26s var(--ease);
}
.float-btn:hover .tip { opacity: 1; transform: translateY(-50%) translateX(0); }
#backTop { opacity: 0; pointer-events: none; }
#backTop.show { opacity: 1; pointer-events: auto; }

/* 移动端底部条 */
.mobile-bar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 70;
  background: rgba(14, 21, 34, 0.95);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--line);
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.mobile-bar a,
.mobile-bar button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 7px 4px;
  border: 0;
  background: none;
  border-radius: 10px;
  font-size: 11.5px;
  color: var(--text-2);
  cursor: pointer;
}
.mobile-bar svg { width: 19px; height: 19px; color: var(--primary); }
.mobile-bar .hl { background: var(--primary); color: var(--primary-ink); font-weight: 700; }
.mobile-bar .hl svg { color: var(--primary-ink); }

/* ---------- 19. 弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(12, 18, 29, 0.74);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}
.modal.open { opacity: 1; visibility: visible; }
.modal-box {
  position: relative;
  width: 100%;
  max-width: 400px;
  padding: 34px 30px 30px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(34, 211, 238, 0.26);
  background: linear-gradient(165deg, #1a2434, #141d2b);
  box-shadow: 0 40px 100px -30px rgba(0, 0, 0, 0.55);
  text-align: center;
  transform: translateY(16px) scale(0.97);
  transition: transform 0.34s var(--ease);
}
.modal.open .modal-box { transform: none; }
.modal-close {
  position: absolute;
  top: 14px; right: 14px;
  width: 34px; height: 34px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.062);
  color: var(--muted);
  cursor: pointer;
  display: grid;
  place-items: center;
}
.modal-close:hover { color: #fff; border-color: var(--line-strong); }
.modal-box h3 { font-size: 19px; margin-bottom: 8px; }
.modal-box p { font-size: 13.5px; color: var(--muted); }
.qr-wrap {
  width: 208px;
  height: 208px;
  margin: 22px auto 18px;
  padding: 12px;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 16px 40px -18px rgba(34, 211, 238, 0.5);
}
.qr-wrap img { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }
.modal-tip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--dim);
}
.modal-tip svg { width: 14px; height: 14px; color: var(--primary); }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%) translateY(20px);
  z-index: 300;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: rgba(26, 36, 51, 0.97);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--text);
  font-size: 14px;
  box-shadow: 0 18px 44px -18px rgba(0, 0, 0, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: all 0.32s var(--ease);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 20. 子页 Hero ---------- */
.page-hero {
  padding: calc(var(--nav-h) + 70px) 0 62px;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.page-hero .h1 { font-size: clamp(32px, 4.2vw, 52px); max-width: 18em; }
.page-hero .lead { max-width: 640px; margin-top: 20px; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--dim);
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.breadcrumb a { transition: color 0.22s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #37414f; }

/* ---------- 21. 业务页详情 ---------- */
.biz-section {
  padding: 76px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--nav-h) + 20px);
}
.biz-section:last-of-type { border-bottom: 0; }
.biz-section-head {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: end;
  margin-bottom: 44px;
}
.biz-section-head .index-big {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 0.16em;
  margin-bottom: 14px;
  display: block;
}
.biz-section-head .lead { margin-top: 14px; }

.svc-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.svc {
  padding: 22px 22px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.062);
  transition: all 0.32s var(--ease);
}
.svc:hover {
  border-color: rgba(34, 211, 238, 0.32);
  background: rgba(34, 211, 238, 0.05);
  transform: translateY(-3px);
}
.svc h4 { font-size: 15.5px; margin-bottom: 7px; display: flex; align-items: center; gap: 8px; }
.svc h4 svg { width: 15px; height: 15px; color: var(--primary); flex: none; }
.svc p { font-size: 13px; color: var(--muted); line-height: 1.75; }

.biz-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}
.biz-meta div { background: #141d2b; padding: 16px 20px; }
.biz-meta dt { font-size: 11.5px; color: var(--dim); letter-spacing: 0.06em; margin-bottom: 4px; }
.biz-meta dd { margin: 0; font-size: 14.5px; font-weight: 600; color: var(--text); }

/* 价格表 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.032);
}
table.price-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 14px;
}
.price-table th,
.price-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.price-table thead th {
  background: rgba(255, 255, 255, 0.062);
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.price-table tbody tr:last-child td { border-bottom: 0; }
.price-table td:first-child { color: var(--text-2); font-weight: 600; }
.price-table tbody tr:hover { background: rgba(34, 211, 238, 0.035); }
.price-table .price-cell { color: var(--primary); font-weight: 700; white-space: nowrap; font-variant-numeric: tabular-nums; }
.price-table .rec-col { background: rgba(34, 211, 238, 0.05); }

/* ---------- 22. 筛选标签 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 36px 0 34px;
}
.filter-btn {
  padding: 8px 17px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.075);
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.26s var(--ease);
}
.filter-btn:hover { border-color: rgba(34, 211, 238, 0.4); color: #fff; }
.filter-btn.on {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-ink);
  font-weight: 700;
}

.hidden { display: none !important; }

/* ---------- 23. 文章 ---------- */
.post-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}
.post-top {
  padding: 24px 26px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--dim);
  font-family: var(--mono);
}
.post-body { padding: 16px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.post-body h3 { font-size: 17.5px; line-height: 1.45; margin-bottom: 10px; }
.post-body p { font-size: 13.5px; color: var(--muted); flex: 1; }
.post-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--dim);
}

.feature-post {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0;
  overflow: hidden;
  padding: 0;
}
.feature-post .fp-visual {
  position: relative;
  min-height: 300px;
  background: linear-gradient(150deg, #1e2c40, #17222f 60%, #25354f);
  border-right: 1px solid var(--line);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.feature-post .fp-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.068) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.068) 1px, transparent 1px);
  background-size: 38px 38px;
}
.feature-post .fp-visual .big-num {
  position: relative;
  z-index: 1;
  font-size: 76px;
  font-weight: 800;
  letter-spacing: -0.05em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.feature-post .fp-content { padding: 38px 36px; display: flex; flex-direction: column; }

/* 正文排版 */
.prose {
  font-size: 16.5px;
  line-height: 2;
  color: var(--text-2);
}
.prose > * + * { margin-top: 24px; }
.prose h2 {
  font-size: 25px;
  margin-top: 52px;
  margin-bottom: 4px;
  color: #fff;
  padding-left: 14px;
  border-left: 3px solid var(--primary);
  line-height: 1.35;
}
.prose h3 { font-size: 19px; margin-top: 34px; color: #fff; }
.prose p { color: var(--text-2); }
.prose strong { color: #fff; font-weight: 600; }
.prose a {
  color: var(--primary);
  border-bottom: 1px solid rgba(34, 211, 238, 0.35);
  transition: border-color 0.2s;
}
.prose a:hover { border-bottom-color: var(--primary); }
.prose ul,
.prose ol { padding-left: 4px; display: flex; flex-direction: column; gap: 11px; }
.prose ul li { position: relative; padding-left: 20px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px; top: 13px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--primary);
}
.prose ol { counter-reset: n; }
.prose ol li {
  position: relative;
  padding-left: 30px;
  counter-increment: n;
}
.prose ol li::before {
  content: counter(n) ".";
  position: absolute;
  left: 0; top: 0;
  color: var(--primary);
  font-weight: 700;
  font-family: var(--mono);
  font-size: 14px;
}
.prose blockquote {
  margin: 32px 0;
  padding: 22px 26px;
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(34, 211, 238, 0.055);
  color: var(--text);
  font-size: 15.5px;
}
.prose blockquote p { color: var(--text); margin: 0; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 28px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.prose th,
.prose td { padding: 12px 16px; border-bottom: 1px solid var(--line); text-align: left; }
.prose thead th { background: rgba(255, 255, 255, 0.068); color: #fff; font-size: 13px; }
.prose tbody tr:last-child td { border-bottom: 0; }
.prose .callout {
  padding: 20px 24px;
  border-radius: var(--radius);
  border: 1px solid rgba(34, 211, 238, 0.24);
  background: rgba(34, 211, 238, 0.05);
  font-size: 14.5px;
  line-height: 1.85;
}
.prose .callout strong { display: block; margin-bottom: 4px; color: var(--primary); }

.post-head-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 26px;
  font-size: 13px;
  color: var(--dim);
}
.post-head-meta .who {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-2);
}

.author-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  margin-top: 52px;
}
.author-card .avatar { width: 48px; height: 48px; font-size: 17px; }
.author-card strong { display: block; font-size: 15px; margin-bottom: 3px; }
.author-card span { font-size: 12.5px; color: var(--dim); display: block; margin-bottom: 8px; }
.author-card p { font-size: 13.5px; color: var(--muted); line-height: 1.8; }

/* ---------- 24. 关于页 ---------- */
.timeline { position: relative; margin-top: 48px; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 3px; top: 8px; bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--primary), rgba(34, 211, 238, 0.06));
}
.tl-item { position: relative; padding: 0 0 38px 0; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -26px; top: 7px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12);
}
.tl-year {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.tl-item h4 { font-size: 16.5px; margin-bottom: 5px; }
.tl-item p { font-size: 14px; color: var(--muted); line-height: 1.8; }

.team-card { text-align: center; padding: 28px 20px; }
.team-avatar {
  width: 72px; height: 72px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-ink);
  background: var(--grad);
  box-shadow: 0 14px 34px -16px rgba(34, 211, 238, 0.8);
}
.team-card h4 { font-size: 16px; margin-bottom: 4px; }
.team-card .role { font-size: 12.5px; color: var(--primary); margin-bottom: 10px; letter-spacing: 0.02em; }
.team-card p { font-size: 13px; color: var(--muted); line-height: 1.75; }

.value-item { padding: 26px 24px; }
.value-item .vnum {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--primary);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

/* ---------- 25. 联系页 ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 36px;
  align-items: start;
}
.contact-info-card {
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.028));
}
.contact-row {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-row:last-of-type { border-bottom: 0; padding-bottom: 0; }
.contact-row .cicon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.2);
  color: var(--primary);
  flex: none;
}
.contact-row .cicon svg { width: 18px; height: 18px; }
.contact-row .clabel { display: block; font-size: 12px; color: var(--dim); margin-bottom: 3px; letter-spacing: 0.04em; }
.contact-row .cval { display: block; font-size: 15px; font-weight: 600; color: var(--text); }
.contact-row .cval a:hover { color: var(--primary); }
.contact-row .cval small { display: block; font-size: 12.5px; font-weight: 400; color: var(--muted); margin-top: 3px; }

.qr-inline {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
}
.qr-inline .qr-box {
  width: 96px; height: 96px;
  padding: 7px;
  border-radius: 10px;
  background: #fff;
  flex: none;
}
.qr-inline .qr-box img { width: 100%; height: 100%; object-fit: contain; }
.qr-inline strong { display: block; font-size: 14px; margin-bottom: 4px; }
.qr-inline span { font-size: 12.5px; color: var(--muted); line-height: 1.6; display: block; }

/* 侧栏 */
.side-card {
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}
.side-card h4 { font-size: 15px; margin-bottom: 14px; }
.side-list li {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  color: var(--muted);
  padding: 9px 0;
  line-height: 1.7;
}
.side-list li svg { width: 15px; height: 15px; color: var(--primary); flex: none; margin-top: 4px; }

/* 地图占位 */
.map-box {
  position: relative;
  height: 220px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, #17202e, #131b27);
  overflow: hidden;
  display: grid;
  place-items: center;
  text-align: center;
}
.map-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.075) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000, transparent 72%);
  mask-image: radial-gradient(circle at 50% 50%, #000, transparent 72%);
}
.map-box .pin {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
}
.map-box .pin svg { width: 26px; height: 26px; color: var(--primary); }

/* ---------- 26. 案例详情 ---------- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
  margin: 40px 0;
}
.kpi-row > div { background: #141d2b; padding: 22px 20px; }
.kpi-row dt { font-size: 11.5px; color: var(--dim); margin-bottom: 6px; letter-spacing: 0.05em; }
.kpi-row dd {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.kpi-row dd small { font-size: 13px; font-weight: 600; color: var(--muted); margin-left: 2px; }

.case-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* ---------- 27. 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: 0.08s; }
.reveal[data-d="2"] { transition-delay: 0.16s; }
.reveal[data-d="3"] { transition-delay: 0.24s; }
.reveal[data-d="4"] { transition-delay: 0.32s; }
.reveal[data-d="5"] { transition-delay: 0.4s; }

/* ---------- 27.5 补充组件 ---------- */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 36px;
}
.anchor-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.075);
  font-size: 13.5px;
  color: var(--text-2);
  transition: all 0.26s var(--ease);
}
.anchor-nav a:hover {
  border-color: rgba(34, 211, 238, 0.5);
  background: rgba(34, 211, 238, 0.07);
  color: var(--primary);
  transform: translateY(-2px);
}
.anchor-nav a em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--primary);
  opacity: 0.85;
}

.note-box {
  display: flex;
  gap: 12px;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px dashed var(--line-strong);
  background: rgba(255, 255, 255, 0.02);
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.85;
}
.note-box svg {
  width: 18px; height: 18px;
  color: var(--primary);
  flex: none;
  margin-top: 3px;
}
.note-box strong { color: var(--text); }

.tier-badge {
  position: absolute;
  top: -1px; right: 22px;
  padding: 4px 12px;
  border-radius: 0 0 8px 8px;
  background: var(--primary);
  color: var(--primary-ink);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  z-index: 2;
}

.panel {
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.028));
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.split-wide { grid-template-columns: 1.6fr 1fr; gap: 56px; }

.check-list { display: flex; flex-direction: column; gap: 12px; }
.check-list li {
  display: flex;
  gap: 11px;
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.75;
}
.check-list li svg {
  width: 17px; height: 17px;
  color: var(--primary);
  flex: none;
  margin-top: 5px;
}
.check-list li strong { color: #fff; font-weight: 600; }

/* ---------- 28. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 9px 10px; font-size: 14px; }
  .nav-phone { display: none; }
  .biz-section-head { grid-template-columns: 1fr; gap: 24px; }
  .svc-list { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .step:nth-child(4)::before { transform: scaleX(1); }
  .step { padding-right: 18px; }
  .metric-band { padding: 36px 28px; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
}

@media (max-width: 860px) {
  :root { --nav-h: 64px; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 18px 22px;
    background: rgba(14, 21, 34, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--ease);
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { padding: 13px 12px; font-size: 15.5px; border-bottom: 1px solid rgba(255, 255, 255, 0.075); border-radius: 0; }
  .nav-links a.active::after { display: none; }

  /* 移动端：下拉平铺为缩进子项，无需悬停 */
  .nav-item { position: static; }
  .nav-item > a { justify-content: space-between; }
  .nav-item .caret { display: none; }
  .nav-drop {
    position: static;
    width: auto;
    margin: 0;
    padding: 2px 0 4px 12px;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: transparent;
    border: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 0;
    box-shadow: none;
    backdrop-filter: none;
    margin-left: 14px;
  }
  .nav-drop::before { display: none; }
  .nav-drop { display: block; }
  .nav-links .nav-drop a { display: flex; flex-direction: row; align-items: center; width: auto; gap: 9px; padding: 10px 12px; font-size: 14.5px; border-bottom: 0; color: var(--text-2); }
  .nav-links .nav-drop a svg { width: 14px; height: 14px; opacity: 0.8; }
  .nav-drop .dt strong { font-size: 14.5px; font-weight: 400; color: var(--text-2); white-space: normal; }
  .nav-drop .dt small { display: none; }
  .nav-cta .btn { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }

  .float-bar { display: none; }
  .mobile-bar { display: grid; }
  body { padding-bottom: 68px; }

  .section { padding: 76px 0; }
  .section-sm { padding: 52px 0; }
  .hero { padding: calc(var(--nav-h) + 62px) 0 64px; }
  .hero .h1 { max-width: 100%; }
  .stat-row { margin-top: 52px; }
  .stat { padding: 24px 10px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .biz-list { grid-template-columns: 1fr 1fr; }
  .process { grid-template-columns: 1fr; gap: 0; }
  .step { padding: 24px 0 0 0; }
  .step::before { transform: scaleX(1); }
  .svc-list { grid-template-columns: 1fr; }
  .biz-meta { grid-template-columns: 1fr; }
  .biz-meta div { border-bottom: 1px solid var(--line); }
  .biz-meta div:last-child { border-bottom: 0; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 26px 22px; }
  .feature-post { grid-template-columns: 1fr; }
  .feature-post .fp-visual { min-height: 190px; border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-post .fp-visual .big-num { font-size: 58px; }
  .feature-post .fp-content { padding: 28px 24px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .metric-band { padding: 28px 20px; }
  .page-hero { padding: calc(var(--nav-h) + 48px) 0 44px; }
  .prose { font-size: 16px; line-height: 1.95; }
  .prose h2 { font-size: 21px; margin-top: 40px; }
  .prose h2 { margin-top: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; padding-bottom: 36px; }
  /* 子栏目横向铺开，紧跟在主项标题下方 */
  .footer-col h4 { margin-bottom: 12px; }
  .footer-col ul { flex-direction: row; flex-wrap: wrap; gap: 10px 22px; }
  .footer-col a { font-size: 14px; }
  .footer-col a:hover { transform: none; }
  .site-footer { padding-top: 52px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .case-kpi { gap: 16px; }
  .biz-section { padding: 56px 0; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split-wide { grid-template-columns: 1fr; gap: 36px; }
  .panel { padding: 24px 20px; }
  .anchor-nav { margin-top: 26px; }
  .note-box { padding: 16px 18px; }
  .modal-box { padding: 28px 22px 24px; }
  .qr-wrap { width: 180px; height: 180px; }
  .quote { padding: 24px; }
  .card { padding: 24px; }
  .biz-card { padding: 24px 22px 22px; }
  .case-thumb .thumb-label { font-size: 25px; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .h1 { font-size: clamp(28px, 7.4vw, 34px); }
  .page-hero .h1 { font-size: clamp(26px, 6.9vw, 32px); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .biz-list { grid-template-columns: 1fr; }
  .brand-text { font-size: 15.5px; }
  .form-foot { flex-direction: column; align-items: stretch; }
  .form-foot .btn { width: 100%; }
  .stat { padding: 18px 8px; }
  .case-kpi { flex-wrap: wrap; gap: 14px 22px; }
}

/* ---------- 29. 降级动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 30. 打印 ---------- */
@media print {
  .site-nav, .float-bar, .mobile-bar, .bg-fx, .modal, .toast { display: none !important; }
  body { background: #fff; color: #111; padding: 0; }
}