/* =====================================================================
   MASS 落地页 · 通用企业级设计
   白底 + 企业蓝，规整栅格，克制的阴影与动效
   ===================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-active: #1e40af;
  --primary-soft: #eff6ff;
  --primary-border: #bfdbfe;
  --ink: #0f172a;
  --text-1: #0f172a;
  --text-2: #334155;
  --text-3: #64748b;
  --text-4: #94a3b8;
  --border: #e2e8f0;
  --border-light: #eef2f7;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-code: #0f172a;
  --success: #059669;
  --success-soft: #ecfdf5;
  --warn: #d97706;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.10), 0 2px 6px rgba(15, 23, 42, 0.05);
  --max-w: 1200px;
  --nav-h: 64px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, "Liberation Mono", Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  font-family: var(--font);
  color: var(--text-1);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img, svg { display: block; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

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

/* ---------- 通用组件 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; line-height: 1;
  transition: background .15s ease, color .15s ease, border-color .15s ease, box-shadow .15s ease, transform .05s ease;
  white-space: nowrap; user-select: none;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 1px 2px rgba(37, 99, 235, .35); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:active { background: var(--primary-active); }
.btn-outline { background: #fff; color: var(--text-1); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.btn-outline:hover { border-color: #cbd5e1; background: var(--bg-alt); }
.btn-ghost-light { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn-ghost-light:hover { background: rgba(255,255,255,.2); }
.btn-lg { height: 50px; padding: 0 28px; font-size: 16px; border-radius: 10px; }
.btn-sm { height: 36px; padding: 0 16px; font-size: 14px; }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  height: 28px; padding: 0 12px;
  border-radius: 999px;
  font-size: 13px; font-weight: 500;
  background: var(--bg-alt); color: var(--text-3);
  border: 1px solid var(--border-light);
}

.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border-light); border-bottom: 1px solid var(--border-light); }
.section-head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.section-head.align-left { margin-left: 0; text-align: left; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 700; letter-spacing: .08em;
  color: var(--primary); text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 20px; height: 2px; background: var(--primary); border-radius: 2px; }
.section-head h2, .hero h1 {
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.section-head h2 { font-size: 36px; line-height: 1.25; font-weight: 700; }
.section-head p { margin-top: 14px; font-size: 17px; color: var(--text-3); }

/* ---------- 顶部公告条 ---------- */
.notice {
  background: var(--ink); color: #e2e8f0;
  font-size: 13.5px;
}
.notice .container { display: flex; align-items: center; justify-content: center; gap: 12px; min-height: 40px; position: relative; padding-top: 6px; padding-bottom: 6px; }
.notice a { color: #93c5fd; font-weight: 600; }
.notice a:hover { text-decoration: underline; }
.notice-close {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #94a3b8; font-size: 16px;
}
.notice-close:hover { background: rgba(255,255,255,.1); color: #fff; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.scrolled { border-bottom-color: var(--border); box-shadow: 0 1px 0 rgba(15,23,42,.02), 0 4px 16px rgba(15,23,42,.04); }
.nav-inner { display: flex; align-items: center; gap: 32px; height: var(--nav-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; object-fit: contain; }
.brand .brand-name { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.nav-links { display: flex; align-items: center; gap: 4px; margin: 0 auto; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px;
  font-size: 14.5px; font-weight: 500; color: var(--text-2);
  transition: color .15s ease, background .15s ease;
}
.nav-links a:hover { color: var(--text-1); background: var(--bg-alt); }
.nav-links a.active { color: var(--primary); background: var(--primary-soft); }
.nav-actions { display: flex; align-items: center; gap: 12px; flex: none; }
.nav-login { font-size: 14.5px; font-weight: 600; color: var(--text-2); padding: 8px 10px; border-radius: 8px; }
.nav-login:hover { color: var(--text-1); background: var(--bg-alt); }

.nav-toggle { display: none; width: 40px; height: 40px; border-radius: 8px; align-items: center; justify-content: center; color: var(--text-2); }
.nav-toggle:hover { background: var(--bg-alt); }
.nav-toggle svg { width: 22px; height: 22px; }

.mobile-menu {
  display: none;
  border-top: 1px solid var(--border-light);
  background: #fff;
  padding: 12px 24px 20px;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 12px 8px;
  font-size: 15px; font-weight: 500; color: var(--text-2);
  border-bottom: 1px solid var(--border-light);
}
.mobile-menu a:last-of-type { border-bottom: none; }
.mobile-menu .btn { width: 100%; margin-top: 12px; }

/* ---------- Hero ---------- */
.hero {
  padding: 88px 0 72px;
  background:
    linear-gradient(180deg, #f0f6ff 0%, #ffffff 78%);
  border-bottom: 1px solid var(--border-light);
}
.hero-inner { max-width: 860px; margin: 0 auto; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 34px; padding: 5px 16px 5px 8px;
  border-radius: 999px;
  background: #fff; border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  font-size: 13.5px; font-weight: 500; color: var(--text-2);
  margin-bottom: 28px;
  max-width: 100%;
}
.hero-badge .new {
  display: inline-flex; align-items: center;
  height: 22px; padding: 0 9px;
  border-radius: 999px;
  background: var(--primary-soft); color: var(--primary);
  font-size: 12px; font-weight: 700;
}
.hero h1 {
  font-size: clamp(34px, 5.2vw, 56px);
  line-height: 1.15;
  font-weight: 800;
}
.hero h1 .grad {
  background: linear-gradient(100deg, #2563eb 10%, #7c3aed 90%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub {
  margin: 22px auto 0; max-width: 640px;
  font-size: 19px; line-height: 1.7; color: var(--text-3);
}
.hero-cta { display: flex; justify-content: center; gap: 14px; margin-top: 36px; }
.hero-note { margin-top: 16px; font-size: 13.5px; color: var(--text-4); }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  max-width: 860px; margin: 56px auto 0;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: #fff; box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.hero-stat { padding: 22px 16px; text-align: center; }
.hero-stat + .hero-stat { border-left: 1px solid var(--border-light); }
.hero-stat .num {
  font-size: 28px; font-weight: 800; letter-spacing: -0.02em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.hero-stat .num em { font-style: normal; font-size: 16px; font-weight: 700; color: var(--text-3); margin-left: 2px; }
.hero-stat .label { margin-top: 4px; font-size: 13.5px; color: var(--text-3); }

/* Hero 控制台演示 */
.hero-demo { max-width: 980px; margin: 64px auto 0; }
.console {
  background: var(--bg-code);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  text-align: left;
  border: 1px solid #1e293b;
}
.console-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  background: #1e293b;
  border-bottom: 1px solid #334155;
}
.console-dots { display: flex; gap: 6px; }
.console-dots i { width: 11px; height: 11px; border-radius: 50%; background: #475569; }
.console-dots i:nth-child(1) { background: #f87171; }
.console-dots i:nth-child(2) { background: #fbbf24; }
.console-dots i:nth-child(3) { background: #34d399; }
.console-title {
  flex: 1; text-align: center;
  font-family: var(--mono); font-size: 12.5px; color: #94a3b8;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.console-badge {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  color: #34d399; background: rgba(52, 211, 153, .12);
  padding: 3px 9px; border-radius: 999px;
}
.console-body {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0;
  font-family: var(--mono); font-size: 13px; line-height: 1.75;
}
.console-pane { padding: 22px 24px 26px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.console-pane + .console-pane { border-left: 1px solid #1e293b; }
.console-pane .pane-label {
  font-family: var(--font); font-size: 11.5px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: #64748b; margin-bottom: 12px;
}
.console-pane code { color: #cbd5e1; white-space: pre; }
.tok-k { color: #93c5fd; }
.tok-s { color: #86efac; }
.tok-n { color: #fca5a5; }
.tok-c { color: #64748b; }
.console-cursor {
  display: inline-block; width: 8px; height: 15px;
  background: #93c5fd; vertical-align: -2px;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.console-chips {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px;
  margin-top: 20px;
}
.console-chips .tag { background: #fff; }

/* ---------- 模型跑马灯 ---------- */
.trust { padding: 44px 0 48px; border-bottom: 1px solid var(--border-light); background: #fff; }
.trust .trust-title { text-align: center; font-size: 13.5px; font-weight: 600; letter-spacing: .06em; color: var(--text-4); margin-bottom: 26px; }
.marquee { overflow: hidden; position: relative; -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; gap: 14px; width: max-content; animation: marquee 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.m-chip {
  display: inline-flex; align-items: center; gap: 9px;
  height: 44px; padding: 0 20px;
  border: 1px solid var(--border); border-radius: 10px;
  background: #fff;
  font-size: 14.5px; font-weight: 600; color: var(--text-2);
  white-space: nowrap;
}
.m-chip i { width: 8px; height: 8px; border-radius: 50%; background: linear-gradient(135deg, #2563eb, #7c3aed); flex: none; }

/* ---------- 能力网格 ---------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.card:hover { box-shadow: var(--shadow-md); border-color: #cbd5e1; transform: translateY(-3px); }
.icon-box {
  width: 46px; height: 46px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 11px;
  background: var(--primary-soft); color: var(--primary);
  margin-bottom: 18px;
}
.icon-box svg { width: 23px; height: 23px; }
.card h3 { font-size: 17.5px; font-weight: 700; letter-spacing: -0.01em; }
.card p { margin-top: 8px; font-size: 14.5px; line-height: 1.75; color: var(--text-3); }

/* ---------- 模型广场 ---------- */
.models-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.model-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 22px 22px 18px;
  display: flex; flex-direction: column; gap: 12px;
  transition: box-shadow .2s ease, border-color .2s ease, transform .2s ease;
}
.model-card:hover { box-shadow: var(--shadow-md); border-color: var(--primary-border); transform: translateY(-3px); }
.model-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.model-name { font-size: 16px; font-weight: 700; letter-spacing: -0.01em; }
.model-id { font-family: var(--mono); font-size: 12px; color: var(--text-4); margin-top: 3px; word-break: break-all; }
.model-vendor {
  flex: none; font-size: 12px; font-weight: 600; color: var(--text-2);
  background: var(--bg-alt); border: 1px solid var(--border-light);
  padding: 3px 9px; border-radius: 999px;
}
.model-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.model-meta .tag { font-size: 12px; height: 24px; padding: 0 10px; }
.model-prices {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  border-top: 1px dashed var(--border);
  padding-top: 12px; margin-top: auto;
}
.price-item .pl { font-size: 12px; color: var(--text-4); }
.price-item .pv { font-size: 14.5px; font-weight: 700; color: var(--text-1); font-variant-numeric: tabular-nums; }
.price-item .pv small { font-size: 11px; font-weight: 500; color: var(--text-4); margin-left: 2px; }
.models-empty {
  border: 1px dashed var(--border); border-radius: var(--radius-lg);
  background: var(--bg-alt);
  padding: 56px 24px; text-align: center; color: var(--text-3);
  grid-column: 1 / -1;
}
.models-empty .icon-box { margin-bottom: 12px; }
.models-empty p { margin: 6px 0 18px; font-size: 14.5px; }
.models-foot { margin-top: 32px; text-align: center; }

/* ---------- 应用场景 ---------- */
.grid-6 { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.scene-card { grid-column: span 2; }
.scene-card.wide { grid-column: span 3; }
.scene-card ul { margin: 14px 0 0; padding: 0; list-style: none; }
.scene-card li {
  position: relative; padding: 5px 0 5px 22px;
  font-size: 13.5px; color: var(--text-3);
}
.scene-card li::before {
  content: ""; position: absolute; left: 2px; top: 12px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--primary-soft);
  border: 1.5px solid var(--primary);
  opacity: .55;
}
.scene-card li::after {
  content: ""; position: absolute; left: 5.5px; top: 15px;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--primary);
}

/* ---------- 安全与合规 ---------- */
.security-band { background: var(--bg-alt); border-top: 1px solid var(--border-light); border-bottom: 1px solid var(--border-light); padding: 88px 0; }
.security-grid { display: grid; grid-template-columns: 5fr 6fr; gap: 56px; align-items: center; }
.security-grid h2 { font-size: 34px; line-height: 1.25; font-weight: 700; letter-spacing: -0.02em; }
.security-grid .lead { margin-top: 14px; font-size: 16.5px; color: var(--text-3); }
.sec-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.sec-item {
  display: flex; align-items: center; gap: 12px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}
.sec-item .icon-box { width: 38px; height: 38px; border-radius: 9px; margin: 0; flex: none; }
.sec-item .icon-box svg { width: 19px; height: 19px; }
.sec-item b { display: block; font-size: 14.5px; font-weight: 700; }
.sec-item span { display: block; font-size: 12.5px; color: var(--text-3); margin-top: 1px; }

/* ---------- 开发者 ---------- */
.dev-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; align-items: start; }
.steps { display: flex; flex-direction: column; gap: 0; margin-top: 8px; }
.step { position: relative; padding: 0 0 34px 56px; }
.step:last-child { padding-bottom: 0; }
.step::before {
  content: ""; position: absolute; left: 17px; top: 40px; bottom: 6px;
  width: 2px; background: var(--border);
}
.step:last-child::before { display: none; }
.step-no {
  position: absolute; left: 0; top: 0;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--primary-soft); color: var(--primary);
  border: 1px solid var(--primary-border);
  font-size: 14px; font-weight: 800;
}
.step b { display: block; font-size: 16px; font-weight: 700; padding-top: 5px; }
.step p { margin-top: 4px; font-size: 14px; color: var(--text-3); }
.code-window {
  background: var(--bg-code); border: 1px solid #1e293b;
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
}
.code-tabs { display: flex; gap: 2px; background: #1e293b; padding: 8px 10px 0; }
.code-tab {
  padding: 9px 18px;
  font-size: 13px; font-weight: 600; color: #94a3b8;
  border-radius: 8px 8px 0 0;
}
.code-tab:hover { color: #e2e8f0; }
.code-tab.active { background: var(--bg-code); color: #fff; }
.code-copy {
  margin-left: auto; margin-bottom: 6px; align-self: center;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 7px;
  font-size: 12px; font-weight: 600; color: #94a3b8;
  border: 1px solid #334155;
}
.code-copy:hover { color: #fff; border-color: #475569; }
.code-pane { display: none; padding: 22px 24px; overflow-x: auto; }
.code-pane.active { display: block; }
.code-pane pre { font-family: var(--mono); font-size: 13px; line-height: 1.8; color: #cbd5e1; white-space: pre; }
.compat-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* ---------- 定价 ---------- */
.pricing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 880px; margin: 0 auto; }
.price-card {
  position: relative;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 34px 32px;
  transition: box-shadow .2s ease, transform .2s ease;
}
.price-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.price-card.featured { border-color: var(--primary); box-shadow: 0 8px 28px rgba(37, 99, 235, .12); }
.price-card .pop {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff;
  font-size: 12px; font-weight: 700; letter-spacing: .04em;
  padding: 4px 14px; border-radius: 999px;
}
.price-card h3 { font-size: 19px; font-weight: 700; }
.price-card .desc { margin-top: 6px; font-size: 14px; color: var(--text-3); }
.price-line { display: flex; align-items: baseline; gap: 6px; margin: 22px 0 4px; }
.price-line .cur { font-size: 18px; font-weight: 700; color: var(--text-2); }
.price-line .val { font-size: 42px; font-weight: 800; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.price-line .unit { font-size: 14px; color: var(--text-4); }
.price-card ul { list-style: none; margin: 20px 0 26px; }
.price-card li { position: relative; padding: 7px 0 7px 28px; font-size: 14.5px; color: var(--text-2); }
.price-card li svg {
  position: absolute; left: 0; top: 10px; width: 18px; height: 18px; color: var(--success);
}
.price-card .btn { width: 100%; }
.pricing-note { text-align: center; margin-top: 26px; font-size: 13.5px; color: var(--text-4); }

/* ---------- CTA 横幅 ---------- */
.cta-band { padding: 88px 0; }
.cta-card {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, #1e3a8a 0%, #2563eb 55%, #4f46e5 100%);
  border-radius: 20px;
  padding: 64px 40px;
  text-align: center; color: #fff;
}
.cta-card::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 200px at 12% 0%, rgba(255,255,255,.14), transparent 60%),
    radial-gradient(500px 220px at 92% 100%, rgba(255,255,255,.10), transparent 60%);
  pointer-events: none;
}
.cta-card h2 { position: relative; font-size: 34px; font-weight: 800; letter-spacing: -0.02em; }
.cta-card p { position: relative; margin: 14px auto 0; max-width: 520px; font-size: 16.5px; color: rgba(255,255,255,.85); }
.cta-actions { position: relative; display: flex; justify-content: center; gap: 14px; margin-top: 32px; }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: #eff6ff; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-alt); border-top: 1px solid var(--border-light); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { margin-top: 14px; font-size: 14px; color: var(--text-3); max-width: 320px; }
.footer-col h4 { font-size: 13.5px; font-weight: 700; color: var(--text-1); margin-bottom: 16px; letter-spacing: .02em; }
.footer-col a { display: block; padding: 5px 0; font-size: 14px; color: var(--text-3); }
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  font-size: 13px; color: var(--text-4);
}
.footer-bottom .links { display: flex; gap: 20px; }
.footer-bottom a:hover { color: var(--primary); }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; }
  .console-cursor { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .models-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .scene-card, .scene-card.wide { grid-column: span 1; }
  .security-grid, .dev-grid { grid-template-columns: 1fr; gap: 40px; }
  .console-body { grid-template-columns: 1fr; }
  .console-pane + .console-pane { border-left: none; border-top: 1px solid #1e293b; }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .nav-links, .nav-actions .nav-login, .nav-actions .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .hero { padding: 52px 0 52px; }
  .hero-badge { font-size: 12.5px; }
  .hero-sub { font-size: 16px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-note { font-size: 12.5px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 40px; }
  .hero-stat { padding: 16px 12px; }
  .hero-stat:nth-child(3) { border-left: none; }
  .hero-stat:nth-child(n+3) { border-top: 1px solid var(--border-light); }
  .hero-stat .num { font-size: 22px; }
  .hero-demo { margin-top: 44px; }
  .console-body { font-size: 12px; }
  .console-pane { padding: 16px 16px 18px; }
  .console-title { font-size: 11px; }
  .console-chips .tag { font-size: 12px; }
  .trust { padding: 36px 0 40px; }
  .m-chip { height: 38px; padding: 0 14px; font-size: 13px; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 26px; }
  .section-head p { font-size: 15px; }
  .grid-4, .grid-3, .models-grid, .grid-6 { grid-template-columns: 1fr; }
  .sec-list { grid-template-columns: 1fr; }
  .security-band { padding: 64px 0; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card { padding: 28px 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer { padding: 48px 0 28px; }
  .cta-card { padding: 44px 24px; }
  .cta-card h2 { font-size: 25px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .code-tabs { overflow-x: auto; }
  .code-pane { padding: 16px 16px 20px; }
  .code-pane pre { font-size: 12px; }
  .notice .container { padding-right: 40px; padding-left: 40px; text-align: center; }
}