/* ============================================================
   纳链科技官网 · 设计系统
   自托管 / 零外部依赖 / 系统字体栈
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg-0: #0b0c14;
  --bg-1: #0f1120;
  --bg-2: #151827;
  --bg-3: #1a1e30;
  --stroke: rgba(255, 255, 255, 0.08);
  --stroke-strong: rgba(255, 255, 255, 0.14);
  --text-1: #f2f4fa;
  --text-2: #a7adc2;
  --text-3: #767c93;
  --violet: #8b5cf6;
  --violet-2: #a78bfa;
  --cyan: #22d3ee;
  --grad: linear-gradient(120deg, #8b5cf6 10%, #6366f1 45%, #22d3ee 90%);
  --grad-soft: linear-gradient(120deg, rgba(139, 92, 246, 0.16), rgba(34, 211, 238, 0.12));
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-card: 0 18px 44px -18px rgba(0, 0, 0, 0.6);
  --glow-violet: 0 0 44px rgba(139, 92, 246, 0.35);
  --container: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC",
    "MiSans", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC",
    "Source Han Sans SC", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Noto Sans Mono CJK SC", monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  background: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { color: var(--text-1); line-height: 1.3; margin: 0 0 0.6em; font-weight: 700; }
p { margin: 0 0 1em; }
a { color: var(--violet-2); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--cyan); }
img { max-width: 100%; display: block; }
ul { padding: 0; margin: 0; list-style: none; }
::selection { background: rgba(139, 92, 246, 0.45); color: #fff; }

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

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--violet); color: #fff; padding: 8px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 通用文字组件 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--cyan);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.section { padding: 88px 0; position: relative; }
.section-alt { background: var(--bg-1); }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .eyebrow::before { display: none; }

.section-head h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  letter-spacing: 0.01em;
  margin-bottom: 14px;
}
.section-head .lead { font-size: 17px; color: var(--text-2); }

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600; font-family: inherit;
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s, background 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, #7c4ef0, #5a5ff0 55%, #1fb6d8);
  box-shadow: 0 10px 28px -10px rgba(124, 78, 240, 0.65);
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 34px -10px rgba(124, 78, 240, 0.8);
}
.btn-ghost {
  color: var(--text-1);
  border-color: var(--stroke-strong);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { color: var(--cyan); border-color: rgba(34, 211, 238, 0.5); transform: translateY(-2px); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(11, 12, 20, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.site-header.scrolled { border-bottom-color: var(--stroke); background: rgba(11, 12, 20, 0.88); }

.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { height: 36px; width: auto; flex: none; }
footer .brand-mark { height: 32px; }
.brand-name {
  display: flex; flex-direction: column; line-height: 1.15;
  color: var(--text-1); font-size: 19px; font-weight: 700; letter-spacing: 0.04em;
}
.brand-name small {
  font-family: var(--mono); font-size: 9.5px; font-weight: 500;
  letter-spacing: 0.34em; color: var(--text-3);
}

.main-nav ul { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  display: inline-flex; align-items: center; gap: 5px;
  color: var(--text-2); font-size: 15px; font-weight: 500;
  padding: 8px 14px; border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}
.main-nav a:hover { color: var(--text-1); background: rgba(255, 255, 255, 0.06); }
.main-nav a.active { color: var(--text-1); background: var(--grad-soft); }
.main-nav a[aria-current="page"] { color: var(--text-1); }
.nav-external a { color: var(--text-3); }
.nav-external a:hover { color: var(--cyan); }

.header-actions { display: flex; align-items: center; gap: 18px; }
.header-phone {
  font-family: var(--mono); font-size: 14px; color: var(--text-2); letter-spacing: 0.03em;
}
.header-phone:hover { color: var(--cyan); }

.nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--stroke-strong); background: rgba(255, 255, 255, 0.04);
  cursor: pointer; position: relative;
}
.nav-toggle span, .nav-toggle span::before {
  content: ""; position: absolute; left: 11px; right: 11px; height: 2px;
  background: var(--text-1); border-radius: 2px; transition: transform 0.3s var(--ease), top 0.3s;
}
.nav-toggle span { top: 17px; }
.nav-toggle span::before { top: 8px; left: 0; right: 0; }
.nav-toggle[aria-expanded="true"] span { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::before { transform: rotate(-90deg); top: 0; }

.nav-mobile-cta { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 190px 0 110px;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(52% 44% at 18% 8%, rgba(124, 78, 240, 0.22), transparent 70%),
    radial-gradient(44% 40% at 86% 26%, rgba(34, 211, 238, 0.14), transparent 70%),
    radial-gradient(30% 30% at 55% 90%, rgba(99, 102, 241, 0.12), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(70% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 72px; align-items: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 16px 7px 8px; border-radius: 999px;
  border: 1px solid var(--stroke-strong);
  background: rgba(255, 255, 255, 0.04);
  font-size: 13.5px; color: var(--text-2);
  margin-bottom: 26px;
}
.hero-badge .dot {
  width: 22px; height: 22px; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--grad); color: #fff; font-size: 11px;
}

.hero h1 {
  font-size: clamp(2.35rem, 4.6vw, 3.9rem);
  line-height: 1.18; letter-spacing: 0.015em;
  margin-bottom: 22px;
}
.hero .sub {
  font-size: clamp(15.5px, 1.35vw, 17.5px);
  max-width: 34em; color: var(--text-2); margin-bottom: 40px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 48px; }
.hero-cta .btn { padding: 15px 32px; font-size: 15.5px; }

.hero-stats {
  display: flex; justify-content: space-between; gap: 28px; flex-wrap: wrap;
  max-width: 540px;
  border-top: 1px solid var(--stroke); padding-top: 28px;
}
.hero-stats .num {
  font-family: var(--mono); font-size: 30px; font-weight: 700;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-stats .lbl { font-size: 13px; color: var(--text-3); letter-spacing: 0.06em; }

/* Hero 视觉区：点阵地球主视觉 + 链环轨道 + 代码卡片 */
.hero-visual { position: relative; min-height: 500px; }

.orbit {
  position: absolute; right: -40px; top: 50%; transform: translateY(-50%);
  width: min(560px, 104%); aspect-ratio: 1; border-radius: 50%;
  border: 1px dashed rgba(139, 92, 246, 0.32);
  animation: orbitSpin 60s linear infinite;
}
.orbit::before, .orbit::after {
  content: ""; position: absolute; width: 12px; height: 12px; border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 14px rgba(124, 78, 240, 0.8);
}
.orbit::before { top: -6px; left: 50%; margin-left: -6px; }
.orbit::after { bottom: 12%; right: 7%; width: 8px; height: 8px; }

@keyframes orbitSpin { to { transform: translateY(-50%) rotate(360deg); } }

.glow-orb {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  width: min(440px, 84%); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, rgba(124, 78, 240, 0.4), rgba(34, 211, 238, 0.12) 55%, transparent 72%);
  filter: blur(38px);
  pointer-events: none;
}

.hero-visual .globe {
  position: absolute; right: -10px; top: 50%; transform: translateY(-50%);
  width: min(500px, 96%); aspect-ratio: 1; border-radius: 50%;
  mix-blend-mode: screen; opacity: 0.95;
  filter: brightness(1.12);
}

.hero-card {
  position: absolute; z-index: 2;
  background: rgba(21, 24, 39, 0.78);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--stroke-strong); border-radius: 16px;
  padding: 16px 20px; box-shadow: var(--shadow-card);
  animation: float 7s ease-in-out infinite;
}
.hero-card.code { left: -6px; top: 50%; margin-top: -130px; max-width: 330px; animation-delay: 0.4s; }
.hero-card .hc-title { font-size: 13px; color: var(--text-1); font-weight: 600; margin-bottom: 6px; }
.hero-card pre {
  margin: 0; font-family: var(--mono); font-size: 12px; line-height: 1.75;
  color: var(--text-3);
}
.hero-card .tok-key { color: var(--violet-2); }
.hero-card .tok-str { color: var(--cyan); }
.hero-card .avatar {
  width: 44px; height: 44px; border-radius: 12px; flex: none;
  background: var(--grad); display: grid; place-items: center;
  font-size: 15px; color: #fff; font-weight: 700;
}
.hero-card .hc-line { font-size: 13.5px; color: var(--text-1); font-weight: 600; line-height: 1.4; }
.hero-card .hc-sub { font-size: 12px; color: var(--text-3); }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* ---------- 服务卡片 ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.svc-card {
  position: relative;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--stroke); border-radius: var(--radius);
  padding: 30px 28px 26px;
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
  overflow: hidden;
  display: flex; flex-direction: column;
}
.svc-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--grad); opacity: 0; transition: opacity 0.35s;
}
.svc-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: var(--shadow-card);
}
.svc-card:hover::before { opacity: 1; }

.svc-icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 20px;
  display: grid; place-items: center;
  background: var(--grad-soft);
  border: 1px solid rgba(139, 92, 246, 0.28);
  color: var(--violet-2);
}
.svc-card:hover .svc-icon { color: var(--cyan); border-color: rgba(34, 211, 238, 0.35); }
.svc-card h3 { font-size: 19px; margin-bottom: 8px; }
.svc-card .tagline { font-family: var(--mono); font-size: 12px; color: var(--text-3); letter-spacing: 0.05em; margin-bottom: 12px; }
.svc-card p { font-size: 14.5px; flex: 1; }
.svc-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; margin-top: 10px;
}
.svc-link::after { content: "→"; transition: transform 0.25s var(--ease); }
.svc-card:hover .svc-link::after { transform: translateX(4px); }

/* ---------- Bento 优势 ---------- */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.bento-item {
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--stroke); border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.bento-item:hover { border-color: var(--stroke-strong); transform: translateY(-4px); }
.bento-item.wide { grid-column: span 2; }
.bento-item h3 { font-size: 17.5px; display: flex; align-items: center; gap: 10px; }
.bento-item p { font-size: 14.5px; margin-bottom: 0; }
.bento-item .bi-icon {
  width: 40px; height: 40px; border-radius: 11px; flex: none;
  display: grid; place-items: center;
  background: var(--grad-soft); color: var(--violet-2);
  border: 1px solid rgba(139, 92, 246, 0.25);
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip {
  font-size: 12.5px; font-family: var(--mono);
  padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--stroke); color: var(--text-3);
  background: rgba(255, 255, 255, 0.03);
}

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step {
  position: relative; padding: 26px 24px;
  border: 1px solid var(--stroke); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
}
.step .no {
  font-family: var(--mono); font-size: 13px; color: var(--cyan); letter-spacing: 0.12em;
  display: block; margin-bottom: 14px;
}
.step h3 { font-size: 17px; }
.step p { font-size: 14px; margin: 0; }
.step::after {
  content: ""; position: absolute; top: 50%; right: -22px; width: 22px; height: 1px;
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.6), rgba(34, 211, 238, 0.3));
}
.step:last-child::after { display: none; }

/* ---------- 案例 ---------- */
.case-card {
  position: relative;
  border: 1px solid var(--stroke); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.case-card:hover { transform: translateY(-5px); border-color: rgba(34, 211, 238, 0.35); box-shadow: var(--shadow-card); }

.case-thumb { aspect-ratio: 1 / 1; overflow: hidden; position: relative; }
.case-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.case-card:hover .case-thumb img { transform: scale(1.05); }
.case-thumb.empty {
  display: grid; place-items: center;
  background:
    radial-gradient(80% 100% at 20% 0%, rgba(124, 78, 240, 0.28), transparent 60%),
    radial-gradient(70% 90% at 90% 100%, rgba(34, 211, 238, 0.16), transparent 60%),
    var(--bg-3);
}
.case-thumb.empty::before {
  content: attr(data-initial);
  font-size: 34px; font-weight: 800; letter-spacing: 0.06em;
  color: transparent;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  opacity: 0.85;
}
.case-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.case-industry {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.14em;
  color: var(--cyan); text-transform: uppercase; margin-bottom: 8px; display: block;
}
.case-body h3 { font-size: 17px; margin-bottom: 8px; }
.case-body p { font-size: 14px; color: var(--text-2); margin: 0; flex: 1; }
.case-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.case-tags span {
  font-size: 11.5px; font-family: var(--mono); padding: 3px 10px;
  border-radius: 999px; border: 1px solid var(--stroke); color: var(--text-3);
}
.case-link-hint {
  margin-top: 12px; font-size: 13px; color: var(--violet-2);
  display: inline-flex; align-items: center; gap: 5px; font-weight: 600;
}
a.case-card .case-body h3 { color: var(--text-1); }
a.case-card:hover .case-body h3 { color: var(--cyan); }

/* 案例筛选 */
.case-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-btn {
  font-family: inherit; font-size: 14px; font-weight: 500;
  padding: 8px 20px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--stroke-strong);
  background: rgba(255, 255, 255, 0.03); color: var(--text-2);
  transition: all 0.25s;
}
.filter-btn:hover { color: var(--text-1); border-color: rgba(139, 92, 246, 0.5); }
.filter-btn.active {
  color: #fff; border-color: transparent;
  background: linear-gradient(120deg, #7c4ef0, #1fb6d8);
  box-shadow: 0 8px 22px -8px rgba(124, 78, 240, 0.6);
}
.case-more-wrap { text-align: center; margin-top: 44px; }
.case-count { font-family: var(--mono); font-size: 13px; color: var(--text-3); margin-top: 14px; }
.case-card.is-hidden { display: none; }

/* ---------- 关于 / 地球区块 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split .globe-wrap { position: relative; text-align: center; }
.split .globe-wrap img {
  width: min(430px, 88%); margin: 0 auto; border-radius: 50%;
  mix-blend-mode: screen; opacity: 0.92;
}
.split .globe-wrap::before {
  content: ""; position: absolute; inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 78, 240, 0.22), transparent 65%);
  filter: blur(28px);
}
.feature-list { display: grid; gap: 14px; margin-top: 28px; }
.feature-list li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 16px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--stroke); background: rgba(255, 255, 255, 0.02);
  font-size: 14.5px;
}
.feature-list .fi-icon {
  width: 34px; height: 34px; border-radius: 9px; flex: none; margin-top: 2px;
  display: grid; place-items: center; color: var(--cyan);
  background: rgba(34, 211, 238, 0.1); border: 1px solid rgba(34, 211, 238, 0.22);
}
.feature-list strong { color: var(--text-1); display: block; margin-bottom: 2px; font-size: 15px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item {
  border: 1px solid var(--stroke); border-radius: var(--radius-sm);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  overflow: hidden; transition: border-color 0.3s;
}
.faq-item[open] { border-color: rgba(139, 92, 246, 0.4); }
.faq-item summary {
  cursor: pointer; list-style: none;
  padding: 18px 22px;
  font-weight: 600; color: var(--text-1); font-size: 15.5px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-family: var(--mono); font-size: 20px; color: var(--violet-2);
  transition: transform 0.3s var(--ease);
  flex: none;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 22px 20px; font-size: 14.5px; }

/* ---------- CTA 区 ---------- */
.cta-band {
  position: relative; text-align: center;
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: 26px;
  background:
    radial-gradient(60% 120% at 50% -20%, rgba(124, 78, 240, 0.28), transparent 60%),
    radial-gradient(50% 100% at 85% 110%, rgba(34, 211, 238, 0.14), transparent 60%),
    var(--bg-1);
  padding: 72px 32px;
  overflow: hidden;
}
.cta-band h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
.cta-band p { max-width: 560px; margin: 0 auto 30px; }
.cta-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }

/* ---------- 关于页：大数字带 ---------- */
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin: 40px 0 8px;
}
.stats-band .sb-item {
  border: 1px solid var(--stroke); border-radius: var(--radius-sm);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  padding: 22px 20px; text-align: center;
}
.stats-band .sb-num {
  font-family: var(--mono); font-size: 30px; font-weight: 700; line-height: 1.2;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats-band .sb-num small { font-size: 16px; }
.stats-band .sb-lbl { font-size: 13px; color: var(--text-3); margin-top: 6px; letter-spacing: 0.04em; }

/* ---------- 关于页：竖向时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; max-width: 760px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 10px; bottom: 24px; width: 2px;
  background: linear-gradient(180deg, var(--violet), var(--cyan)); opacity: 0.45;
  border-radius: 2px;
}
.tl-item { position: relative; padding: 0 0 40px 22px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -30px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--violet-2);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15), var(--glow-violet);
}
.tl-item:nth-child(even)::before { border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12); }
.tl-year {
  font-family: var(--mono); font-size: 15px; font-weight: 700;
  color: var(--cyan); letter-spacing: 0.14em; display: block; margin-bottom: 6px;
}
.tl-item h3 { font-size: 18px; margin-bottom: 6px; }
.tl-item p { font-size: 14.5px; margin: 0; max-width: 620px; }

/* ---------- 关于页：价值观 ---------- */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.value-card {
  border: 1px solid var(--stroke); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  padding: 30px 26px;
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.value-card:hover { transform: translateY(-4px); border-color: var(--stroke-strong); }
.value-card .vc-icon {
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 18px;
  display: grid; place-items: center;
  background: var(--grad-soft); color: var(--violet-2);
  border: 1px solid rgba(139, 92, 246, 0.28);
}
.value-card:hover .vc-icon { color: var(--cyan); }
.value-card h3 { font-size: 17px; margin-bottom: 8px; }
.value-card p { font-size: 14px; margin: 0; }

/* ---------- 关于页：资质徽章墙 ---------- */
.cred-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.cred-item {
  border: 1px solid var(--stroke); border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  padding: 16px 18px;
  transition: border-color 0.25s;
}
.cred-item:hover { border-color: rgba(139, 92, 246, 0.4); }
.cred-item .k {
  display: flex; align-items: center; gap: 7px;
  font-size: 12px; color: var(--text-3); letter-spacing: 0.05em; margin-bottom: 7px;
}
.cred-item .k svg { color: var(--violet-2); flex: none; }
.cred-item .v { font-size: 14.5px; color: var(--text-1); font-weight: 600; line-height: 1.5; }
.cred-item .v.mono { font-family: var(--mono); font-size: 13.5px; letter-spacing: 0.02em; }

/* ---------- 页面横幅（子页） ---------- */
.page-hero {
  position: relative; padding: 168px 0 84px; overflow: hidden;
  background:
    radial-gradient(48% 56% at 22% 0%, rgba(124, 78, 240, 0.2), transparent 70%),
    radial-gradient(40% 46% at 82% 16%, rgba(34, 211, 238, 0.12), transparent 70%);
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(60% 80% at 50% 0%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(60% 80% at 50% 0%, #000 20%, transparent 80%);
  pointer-events: none;
}
.breadcrumb {
  position: relative; z-index: 1;
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  font-size: 13.5px; color: var(--text-3); margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb [aria-current] { color: var(--violet-2); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 16px; position: relative; z-index: 1; }
.page-hero .lead { max-width: 660px; font-size: 16.5px; position: relative; z-index: 1; }

/* 子页横幅：带插图的双栏布局 */
.page-hero-grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center;
}
.page-hero-illus { position: relative; z-index: 1; }
.page-hero-illus .illus { width: 100%; height: auto; display: block; }
.illus-float { animation: illusFloat 6s ease-in-out infinite; }
@keyframes illusFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.contact-card {
  border: 1px solid var(--stroke); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  padding: 30px; text-align: center;
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--stroke-strong); }
.contact-card .cc-icon {
  width: 54px; height: 54px; margin: 0 auto 18px; border-radius: 15px;
  display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid rgba(139, 92, 246, 0.28);
  color: var(--violet-2);
}
.contact-card:hover .cc-icon { color: var(--cyan); }
.contact-card h3 { font-size: 16.5px; }
.contact-card .val { font-size: 17px; color: var(--text-1); font-weight: 600; font-family: var(--mono); letter-spacing: 0.02em; }
.copy-btn {
  font: inherit; color: var(--violet-2); background: none; border: none; cursor: pointer;
  padding: 0; font-size: 17px; font-weight: 600; font-family: var(--mono);
}
.copy-btn em {
  font-style: normal; font-size: 12px; margin-left: 8px;
  padding: 2px 9px; border-radius: 999px;
  border: 1px solid var(--stroke-strong); color: var(--text-3);
  transition: all 0.25s; vertical-align: 1px;
}
.copy-btn:hover em { color: var(--cyan); border-color: rgba(34, 211, 238, 0.45); }
.copy-btn.copied em { color: #0b0c14; background: var(--cyan); border-color: var(--cyan); }

.info-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.info-table th, .info-table td {
  text-align: left; padding: 14px 18px;
  border-bottom: 1px solid var(--stroke);
}
.info-table th { color: var(--text-3); font-weight: 500; white-space: nowrap; width: 1%; padding-right: 40px; }
.info-table td { color: var(--text-1); }

/* ---------- 404 ---------- */
.error-page { text-align: center; padding: 200px 24px 140px; }
.error-page .code {
  font-family: var(--mono); font-size: clamp(80px, 14vw, 150px); font-weight: 800; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--stroke);
  background: var(--bg-1);
  padding: 68px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 44px;
  padding-bottom: 54px;
}
.footer-brand { max-width: 330px; }
.footer-brand p { font-size: 14px; }
.footer-meta { color: var(--text-3); font-size: 13.5px; }
.site-footer h3 {
  font-size: 14.5px; color: var(--text-1); margin-bottom: 20px;
  letter-spacing: 0.08em;
}
.site-footer nav li { margin-bottom: 11px; }
.site-footer nav a { color: var(--text-2); font-size: 14px; }
.site-footer nav a:hover { color: var(--cyan); }
.footer-contact li {
  display: flex; gap: 14px; align-items: baseline; margin-bottom: 12px; font-size: 14px;
}
.footer-contact span { color: var(--text-3); flex: none; }
.footer-contact a, .footer-contact .copy-btn { color: var(--text-2); font-size: 14px; font-family: inherit; font-weight: 400; }
.footer-contact .copy-btn em { font-size: 11px; }

.footer-bottom {
  border-top: 1px solid var(--stroke);
  padding: 22px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap;
}
.footer-bottom p { margin: 0; font-size: 13px; color: var(--text-3); }
.beian { display: flex; gap: 22px; flex-wrap: wrap; }
.beian a {
  color: var(--text-3); font-size: 13px;
  display: inline-flex; align-items: center; gap: 6px;
}
.beian a:hover { color: var(--cyan); }
.beian img { display: inline-block; opacity: .9; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 44px; height: 44px; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--stroke-strong);
  background: rgba(21, 24, 39, 0.85); backdrop-filter: blur(10px);
  color: var(--text-2);
  display: grid; place-items: center;
  opacity: 0; transform: translateY(14px); pointer-events: none;
  transition: all 0.35s var(--ease);
}
.back-top.show { opacity: 1; transform: none; pointer-events: auto; }
.back-top:hover { color: var(--cyan); border-color: rgba(34, 211, 238, 0.5); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-card { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { min-height: 0; height: 420px; max-width: 560px; }
  .hero-visual .globe { right: 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento-item.wide { grid-column: span 2; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .page-hero-grid { grid-template-columns: 1fr; gap: 8px; }
  .page-hero-illus { max-width: 420px; margin: 24px auto 0; }
}

@media (max-width: 860px) {
  .section { padding: 72px 0; }
  .hero { padding: 150px 0 80px; }
  .page-hero { padding: 140px 0 60px; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr; }
  .cred-grid { grid-template-columns: 1fr 1fr; }

  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; inset: 72px 0 auto 0; z-index: 99;
    background: rgba(13, 14, 24, 0.97); backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--stroke);
    padding: 18px 24px 26px;
    display: none;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .main-nav a { padding: 12px 14px; font-size: 16px; border-radius: 12px; }
  .header-actions .header-phone, .header-actions .btn { display: none; }
  .nav-mobile-cta { display: block; padding: 14px; }
  .nav-mobile-cta .btn { width: 100%; }

  .hero-stats { gap: 26px; }
  .grid-2, .grid-3, .grid-4, .bento { grid-template-columns: 1fr; }
  .bento-item.wide { grid-column: auto; }
  .steps { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .hero-visual { height: 360px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .hero-cta .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 18px; }
  .hero-visual { height: 300px; }
  .hero-card.code { max-width: 250px; }
  .stats-band { grid-template-columns: 1fr 1fr; }
  .cred-grid { grid-template-columns: 1fr; }
}