/* ============================================================
   页面布局与组件
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.svg-defs { position: absolute; width: 0; height: 0; }
.icon {
  width: 20px; height: 20px;
  fill: none; stroke: currentColor;
  stroke-width: var(--icon-stroke);
  stroke-linecap: round; stroke-linejoin: round;
  flex: none;
}
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 24px; height: 24px; }

/* 环境光斑：玻璃背后必须有内容才能显出折射 */
.ambient { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.orb {
  position: absolute; border-radius: 50%;
  filter: blur(70px); opacity: 0.62;
  animation: orb-float 16s ease-in-out infinite;
}
.orb.a { width: 52vw; height: 52vw; left: -12vw; top: -16vw; background: var(--c-orb-1); }
.orb.b { width: 42vw; height: 42vw; right: -10vw; top: 6vh; background: var(--c-orb-2); animation-delay: -5s; }
.orb.c { width: 46vw; height: 46vw; left: 18vw; top: 52vh; background: var(--c-orb-3); animation-delay: -9s; }
.orb.d { width: 30vw; height: 30vw; right: 6vw; bottom: -8vw; background: var(--c-orb-4); animation-delay: -3s; }

/* 系统状态栏 */
.osbar {
  position: fixed; top: 0; left: 0; right: 0; height: 30px;
  z-index: 60; display: flex; align-items: center; justify-content: space-between;
  padding: 0 26px; font-size: 11px; letter-spacing: 0.06em;
  color: var(--c-ink-2); border-radius: 0; border-width: 0 0 1px;
}
.osbar .grp { display: flex; align-items: center; gap: 12px; }
.os-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-med-green);
  box-shadow: 0 0 0 3px rgba(var(--c-green-rgb), 0.16);
}
.os-mono { font-family: var(--font-mono); }

/* 液态玻璃导航栏 */
.nav {
  position: fixed; top: 38px; left: 50%; transform: translateX(-50%);
  width: min(calc(100% - 40px), var(--maxw)); height: var(--nav-h);
  z-index: 50; display: flex; align-items: center; gap: 16px;
  padding: 0 16px 0 12px; border-radius: var(--r-pill);
}
.nav-brand { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--c-ink); flex: none; }
.nav-brand img { height: 42px; width: auto; display: block; object-fit: contain; mix-blend-mode: multiply; }
.nav-brand .txt { display: flex; flex-direction: column; line-height: 1.1; }
.nav-brand .txt b { font-size: 15px; letter-spacing: 0.02em; }
.nav-brand .txt small { font-size: 9px; color: var(--c-ink-3); letter-spacing: 0.12em; margin-top: 3px; }
.nav-links { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-links a {
  position: relative; padding: 9px 13px; border-radius: var(--r-pill);
  font-size: 13px; color: var(--c-ink-2); text-decoration: none; white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast), transform var(--t-mid) var(--ease-smooth);
}
.nav-links a:hover {
  color: var(--c-brand); background: rgba(var(--c-white-rgb), 0.5);
  transform: translateY(-1px) scale(1.04);
}
.nav-links a.active {
  color: var(--c-brand-deep); background: rgba(var(--c-white-rgb), 0.72);
  box-shadow: inset 0 1px 0 var(--c-white), 0 2px 8px -4px var(--glass-shadow);
}
.nav-badge {
  font-size: 10px; font-family: var(--font-mono); letter-spacing: 0.08em;
  color: var(--c-brand-deep); padding: 6px 10px; border-radius: var(--r-pill);
  background: rgba(var(--c-white-rgb), 0.55); border: 1px solid rgba(var(--c-white-rgb), 0.7);
  flex: none;
}
.nav-slider {
  display: flex; align-items: center; gap: 9px; flex: none;
  padding-left: 14px; border-left: 1px solid rgba(var(--c-brand-rgb), 0.12);
}
.nav-slider-label { font-size: 10px; color: var(--c-ink-3); white-space: nowrap; }
.nav-track { width: 120px; height: 12px; flex: none; }
.nav-track .lq-thumb { width: 24px; height: 24px; }
.nav-hint {
  position: fixed; z-index: 55; top: 122px; left: 50%;
  transform: translateX(-50%) translateY(-8px) scale(0.9);
  opacity: 0; pointer-events: none;
  padding: 9px 17px; border-radius: var(--r-pill);
  font-size: 12px; color: var(--c-brand-deep); white-space: nowrap;
  transition: all var(--t-mid) var(--ease-smooth);
}
.nav-hint.on { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }

/* 通用容器 */
main { position: relative; z-index: 1; }
.wrap { width: min(calc(100% - 40px), var(--maxw)); margin: 0 auto; }
section { scroll-margin-top: 130px; }
.section { padding: 88px 0; }
.sec-head { margin-bottom: 38px; }
.sec-kicker { font-size: 11px; letter-spacing: 0.18em; color: var(--c-med-green); font-weight: 700; }
.sec-title { font-size: clamp(26px, 3.4vw, 40px); margin: 12px 0 10px; letter-spacing: -0.02em; }
.sec-desc { font-size: 15px; color: var(--c-ink-2); line-height: 1.8; max-width: 660px; }
.card { padding: 26px; border-radius: var(--r-lg); transition: transform var(--t-mid) var(--ease-smooth); }
.card:hover { transform: translateY(-5px); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

/* Hero */
.hero { min-height: 100vh; padding: 165px 0 60px; display: flex; align-items: center; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: 52px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: var(--r-pill);
  font-size: 11px; letter-spacing: 0.1em; color: var(--c-brand-deep);
}
h1.hero-title {
  font-size: clamp(38px, 5.2vw, 66px); line-height: 1.09;
  letter-spacing: -0.03em; margin: 22px 0 18px; font-weight: 800;
}
h1.hero-title em { font-style: normal; color: var(--c-brand); }
.hero-sub { font-size: 16px; line-height: 1.85; color: var(--c-ink-2); max-width: 520px; margin: 0 0 26px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 22px; border-radius: var(--r-pill);
  font-size: 14px; font-weight: 600; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; font-family: var(--font);
  transition: transform var(--t-mid) var(--ease-smooth), box-shadow var(--t-mid), background var(--t-fast);
}
.btn:hover { transform: translateY(-2px) scale(1.02); }
.btn-primary {
  background: linear-gradient(135deg, var(--c-brand), var(--c-brand-deep));
  color: var(--c-ink-inv);
  box-shadow: 0 12px 28px -10px rgba(var(--c-brand-rgb), 0.6), inset 0 1px 0 rgba(var(--c-white-rgb), 0.35);
}
.btn-ghost { color: var(--c-brand-deep); border-color: rgba(var(--c-brand-rgb), 0.22); background: rgba(var(--c-white-rgb), 0.4); }
.hero-tip { margin-top: 26px; display: flex; align-items: center; gap: 9px; min-width: 0; font-size: 12px; color: var(--c-ink-3); line-height: 1.6; }
.hero-tip span { flex: 1; min-width: 0; }
.hero-card { padding: 24px; border-radius: var(--r-lg); }
.hero-card img.logo-hero { width: 100%; display: block; border-radius: var(--r-sm); mix-blend-mode: multiply; }
.hero-card .cap { margin-top: 14px; font-size: 11px; color: var(--c-ink-3); text-align: center; letter-spacing: 0.05em; }
.stat-row { display: flex; margin-top: 34px; }
.stat { flex: 1; padding: 0 18px; border-left: 1px solid rgba(var(--c-brand-rgb), 0.14); }
.stat:first-child { padding-left: 0; border-left: none; }
.stat b { display: block; font-size: 30px; font-weight: 800; color: var(--c-brand-deep); font-family: var(--font-mono); letter-spacing: -0.04em; }
.stat span { font-size: 11px; color: var(--c-ink-3); letter-spacing: 0.06em; }

/* 职能卡 / 端卡 */
.mini-ico {
  width: 42px; height: 42px; border-radius: 13px;
  display: grid; place-items: center; margin-bottom: 18px;
  color: var(--c-brand);
  background: linear-gradient(140deg, rgba(var(--c-white-rgb), 0.9), rgba(var(--c-light-rgb), 0.14));
  border: 1px solid rgba(var(--c-white-rgb), 0.8);
  box-shadow: inset 0 1px 0 var(--c-white);
}
.card h3 { margin: 0 0 10px; font-size: 17px; }
.card p { margin: 0; font-size: 13px; line-height: 1.75; color: var(--c-ink-2); }
.end-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 4px; }
.end-card { padding: 22px 18px; border-radius: var(--r-md); text-align: center; }
.end-card b { display: block; font-family: var(--font-mono); font-size: 28px; color: var(--c-brand-deep); margin-bottom: 6px; }
.end-card span { font-size: 12px; color: var(--c-ink-2); }
.end-card small { display: block; margin-top: 8px; font-size: 10px; color: var(--c-ink-3); }

/* 液态玻璃实验室 */
.lab { display: grid; grid-template-columns: 0.86fr 1.14fr; gap: 22px; }
.lab-panel, .lab-demo { padding: 30px; border-radius: var(--r-lg); }
.lab-panel h3, .lab-demo h3 { margin: 0 0 8px; font-size: 19px; }
.lab-panel .hint, .lab-demo .hint { font-size: 12px; color: var(--c-ink-3); line-height: 1.7; margin: 0 0 26px; }
.ctrl { margin-bottom: 26px; }
.ctrl-top { display: flex; justify-content: space-between; align-items: baseline; font-size: 13px; margin-bottom: 13px; }
.ctrl-top span { color: var(--c-ink-2); }
.ctrl-top b { font-family: var(--font-mono); color: var(--c-brand); font-size: 12px; }
.lq-track.big { height: 16px; }
.lab-demo {
  min-height: 320px; display: flex; flex-direction: column;
  justify-content: center; align-items: center; text-align: center;
}
.lab-demo .sample {
  font-size: 18px; line-height: 1.95; color: var(--c-ink);
  max-width: 460px; margin: 18px 0 0; font-weight: 500;
}
.lab-actions { display: flex; gap: 10px; margin-top: 4px; }

/* 750 项服务能力矩阵 */
.fn-toolbar { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.search {
  display: flex; align-items: center; gap: 10px;
  padding: 0 16px; height: 46px; border-radius: var(--r-pill);
  flex: 1; min-width: 240px; color: var(--c-ink-3);
}
.search input {
  border: none; background: none; outline: none; font-family: var(--font);
  font-size: 14px; color: var(--c-ink); width: 100%;
}
.search input::placeholder { color: var(--c-ink-3); }
.fn-count { font-size: 12px; color: var(--c-ink-2); font-family: var(--font-mono); padding: 0 6px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.chip {
  padding: 8px 15px; border-radius: var(--r-pill); font-size: 12px; cursor: pointer;
  border: 1px solid rgba(var(--c-white-rgb), 0.7); background: rgba(var(--c-white-rgb), 0.42);
  color: var(--c-ink-2); font-family: var(--font);
  transition: all var(--t-fast);
}
.chip:hover { transform: translateY(-1px); background: rgba(var(--c-white-rgb), 0.7); }
.chip.active {
  background: linear-gradient(135deg, var(--c-brand), var(--c-brand-deep));
  color: var(--c-ink-inv);
  box-shadow: 0 8px 20px -8px rgba(var(--c-brand-rgb), 0.7);
}
.fn-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.fn-item {
  padding: 16px 18px; border-radius: var(--r-md);
  display: flex; gap: 14px; align-items: flex-start;
  transition: transform var(--t-fast) var(--ease-smooth);
}
.fn-item:hover { transform: translateY(-2px); }
.fn-id {
  font-family: var(--font-mono); font-size: 12px; color: var(--c-brand);
  background: rgba(var(--c-brand-rgb), 0.08); padding: 5px 8px;
  border-radius: 8px; flex: none; min-width: 46px; text-align: center;
}
.fn-body { min-width: 0; }
.fn-mod { font-size: 10px; letter-spacing: 0.06em; color: var(--c-med-green); margin-bottom: 5px; font-weight: 700; }
.fn-desc { font-size: 13px; line-height: 1.6; color: var(--c-ink-2); }
.fn-empty { grid-column: 1 / -1; padding: 50px; text-align: center; color: var(--c-ink-3); font-size: 14px; }
.pager { display: flex; justify-content: center; align-items: center; gap: 10px; margin-top: 26px; }
.pg {
  padding: 9px 15px; border-radius: var(--r-pill);
  border: 1px solid rgba(var(--c-white-rgb), 0.7); background: rgba(var(--c-white-rgb), 0.45);
  font-size: 12px; cursor: pointer; color: var(--c-ink-2); font-family: var(--font);
  transition: transform var(--t-fast);
}
.pg:hover:not(:disabled) { transform: translateY(-2px); background: rgba(var(--c-white-rgb), 0.75); }
.pg:disabled { opacity: 0.4; cursor: not-allowed; }
.pg-info { font-size: 12px; color: var(--c-ink-3); font-family: var(--font-mono); min-width: 118px; text-align: center; }

/* 学术 / 加入 */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.panel { padding: 30px; border-radius: var(--r-lg); }
.panel h3 { margin: 0 0 18px; font-size: 19px; }
.bullet { display: flex; gap: 12px; margin-bottom: 16px; font-size: 13px; line-height: 1.7; color: var(--c-ink-2); }
.bullet .icon { color: var(--c-med-green); margin-top: 3px; }
.field { margin-bottom: 15px; }
.field label { display: block; font-size: 11px; color: var(--c-ink-2); margin-bottom: 7px; letter-spacing: 0.05em; }
.field input, .field select {
  width: 100%; height: 44px; padding: 0 14px;
  border-radius: var(--r-sm); font-family: var(--font); font-size: 13px;
  color: var(--c-ink); outline: none;
  border: 1px solid rgba(var(--c-white-rgb), 0.8);
  background: rgba(var(--c-white-rgb), 0.5);
  transition: border-color var(--t-fast), background var(--t-fast);
}
.field input:focus, .field select:focus { border-color: var(--c-brand-light); background: rgba(var(--c-white-rgb), 0.78); }
.form-note { font-size: 11px; color: var(--c-ink-3); line-height: 1.65; margin-top: 12px; }
.form-result {
  margin-top: 12px; font-size: 12px; line-height: 1.6;
  color: var(--c-brand-deep); display: none;
}
.form-result.on { display: block; }

/* 页脚 */
.footer {
  margin: 60px auto 24px; padding: 30px; border-radius: var(--r-lg);
  display: flex; justify-content: space-between; gap: 26px; flex-wrap: wrap;
  width: min(calc(100% - 40px), var(--maxw));
}
.footer .f-brand { display: flex; align-items: center; gap: 14px; }
.footer img { height: 46px; width: auto; mix-blend-mode: multiply; }
.footer .f-name b { display: block; font-size: 15px; }
.footer .f-name span { font-size: 11px; color: var(--c-ink-3); }
.footer .f-meta { font-size: 11px; line-height: 1.9; color: var(--c-ink-3); max-width: 460px; }

/* 响应式 */
@media (max-width: 980px) {
  .hero-grid, .lab, .two-col { grid-template-columns: minmax(0, 1fr); }
  .nav-links { display: none; }
  .nav-slider { margin-left: auto; }
  .grid-3 { grid-template-columns: 1fr; }
  .fn-list { grid-template-columns: 1fr; }
  .end-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 560px) {
  .nav { gap: 8px; padding: 0 10px 0 8px; }
  .nav-brand img { height: 34px; }
  .nav-brand .txt b { font-size: 13px; }
  .nav-brand .txt small { display: none; }
  .nav-badge, .nav-slider-label { display: none; }
  .nav-track { width: 72px; }
  .nav-slider { padding-left: 8px; }
  .stat b { font-size: 23px; }
  .stat { padding: 0 10px; }
  .osbar { padding: 0 14px; }
  .end-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 64px 0; }
  .hero { padding-top: 148px; }
}

/* 拖动导航滑动键时关闭平滑滚动，保证滑动过程实时可见 */
html.no-smooth { scroll-behavior: auto; }