/* 白泽官网 · QwenPaw 风格改造 v3
   骨架仿制 qwenpaw.agentscope.io 的布局节奏，
   配色保留白泽品牌身份（天青 #38bdf8），不换橙色。
   默认浅色米白底；暗色主题跟随系统切换。
   v3 关键改动：Hero 居中大衬线 + 🦊 + 版本胶囊 + 4 卡片快速开始
*/

/* ---------- 字体（Google Fonts CDN）---------- */
@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@500;600;700;900&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap");

/* ---------- Token ---------- */
:root {
  color-scheme: light;
  /* 白泽品牌色（保留天青，不换 qwenpaw 橙色） */
  --accent: #0284c7;
  --accent-soft: rgba(2, 132, 199, 0.08);
  --accent-deep: #0369a1;
  --ok: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;

  /* 三档背景（交替分区段制造节奏） */
  --bg: #faf8f4;
  --bg-alt: #ffffff;
  --bg-muted: #f2f0ea;

  /* 表面阶 */
  --surface: #ffffff;
  --surface-hi: #fdfcfa;
  --border: #e6e3dc;
  --border-strong: #d3cfc5;

  /* 字色三档 */
  --text: rgba(20, 20, 19, 0.88);
  --text-2: rgba(20, 20, 19, 0.58);
  --text-3: rgba(20, 20, 19, 0.42);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: Consolas, "Cascadia Mono", "JetBrains Mono", monospace;

  /* 标尺 */
  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 28px; --sp-7: 40px; --sp-8: 56px; --sp-9: 80px;

  --radius: 6px;
  --radius-lg: 12px;
  --maxw: 1160px;
  --shadow-sm: 0 1px 2px rgba(20,20,19,.04);
  --shadow: 0 4px 20px rgba(20,20,19,.07);
}

/* 暗色主题：跟随系统切换 */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --accent: #38bdf8;
    --accent-soft: rgba(56, 189, 248, 0.14);
    --accent-deep: #0ea5e9;

    --bg: #0e0e10;
    --bg-alt: #141418;
    --bg-muted: #1a1a20;

    --surface: #1f1f25;
    --surface-hi: #26262d;
    --border: rgba(255,255,255,0.1);
    --border-strong: rgba(255,255,255,0.18);

    --text: rgba(255,255,255,0.88);
    --text-2: rgba(255,255,255,0.62);
    --text-3: rgba(255,255,255,0.42);

    --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
    --shadow: 0 4px 20px rgba(0,0,0,.4);
  }
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--accent); text-decoration: none; transition: all .18s ease; }
a:hover { color: var(--accent-deep); }
img { max-width: 100%; display: block; }
code, pre { font-family: var(--mono); }

/* ---------- 导航栏（QwenPaw 风格：sticky 白底 + 底部边框） ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: .02em;
  font-family: var(--font);
}
/* 项目真实 logo（图标文件：desktop/assets/icon-src.png — 暗色圆角方块里的白狼头） */
.brand .bm {
  width: 34px; height: 34px; flex: none;
  display: block;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(20,20,19,.12), inset 0 0 0 1px rgba(20,20,19,.06);
  overflow: hidden;
}
.brand .bm img { width: 100%; height: 100%; display: block; object-fit: cover; }
@media (prefers-color-scheme: dark) {
  .brand .bm { box-shadow: 0 2px 8px rgba(0,0,0,.5), inset 0 0 0 1px rgba(255,255,255,.08); }
}
.brand .bt b {
  display: block;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font);
}
.brand .bt span {
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: .08em;
}
.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: var(--text-2);
  font-size: 14px;
  padding: 4px 0;
  position: relative;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }

/* 文档按钮：幽灵药丸，带文件图标 */
.nav-doc {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px !important;
  font-size: 13.5px !important;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-2) !important;
  background: transparent;
  font-weight: 500;
  transition: all .18s;
}
.nav-doc:hover {
  color: var(--text) !important;
  border-color: var(--border-strong);
  background: var(--bg-muted);
}
.nav-doc svg { width: 14px; height: 14px; }

/* 下载按钮 + 下拉菜单 */
.nav-download {
  position: relative;
}
.nav-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--bg-alt);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font);
  transition: all .18s;
}
.nav-download-btn svg { width: 14px; height: 14px; }
.nav-download-btn .chevron { width: 12px; height: 12px; transition: transform .18s; }
.nav-download-btn:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.nav-download.open .nav-download-btn { border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
.nav-download.open .nav-download-btn .chevron { transform: rotate(180deg); }

/* 下拉菜单面板 */
.nav-download-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 2px;
  width: 340px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-top: none;
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(20,20,19,.14);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all .18s ease;
  z-index: 200;
  padding: 8px;
}
.nav-download.open .nav-download-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.ndm-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none !important;
  transition: background .15s;
}
.ndm-item:hover { background: var(--bg-muted); }
.ndm-item .ndm-ic {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius);
  flex: none;
}
.ndm-item .ndm-ic svg { width: 18px; height: 18px; }
.ndm-item .ndm-body { flex: 1; min-width: 0; }
.ndm-item .ndm-title {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
}
.ndm-item .ndm-sub {
  font-size: 11.5px;
  color: var(--text-3);
  font-family: var(--mono);
  margin-top: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ndm-item .ndm-arrow {
  width: 14px; height: 14px;
  color: var(--text-3);
  flex: none;
  transition: transform .18s, color .18s;
}
.ndm-item:hover .ndm-arrow { color: var(--accent); transform: translateX(2px); }

.ndm-divider {
  height: 1px;
  background: var(--border);
  margin: 6px 4px;
}
.ndm-more .ndm-ic { background: var(--bg-muted); color: var(--text-2); }
.ndm-more:hover .ndm-ic { background: var(--accent-soft); color: var(--accent); }

/* 下载菜单 loading / error 态 */
.ndm-loading, .ndm-error {
  padding: 14px 16px;
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
}
.ndm-error { color: var(--warn); }
.ndm-retry {
  display: inline-block;
  margin-top: 6px;
  padding: 3px 12px;
  font-size: 12px;
  background: var(--accent);
  color: var(--bg-alt);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font);
}

/* GitHub 主按钮 */
.nav-cta {
  padding: 8px 18px !important;
  background: var(--text);
  color: var(--bg-alt) !important;
  font-size: 13px !important;
  border-radius: var(--radius);
  font-weight: 600;
}
.nav-cta:hover { background: var(--accent); color: var(--bg-alt) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ---------- Hero：全居中 + 版本胶囊 + 大衬线 H1 + 🦊 emoji + 大 SVG ---------- */
.hero {
  position: relative;
  padding: var(--sp-9) 24px var(--sp-8);
  overflow: hidden;
  /* 装饰性渐变底（极淡） */
  background:
    radial-gradient(1200px 500px at 50% -100px, var(--accent-soft), transparent 70%),
    var(--bg);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(2px 2px at 20% 80%, rgba(20,20,19,.06), transparent),
    radial-gradient(2px 2px at 80% 20%, rgba(20,20,19,.05), transparent),
    radial-gradient(1px 1px at 60% 90%, rgba(20,20,19,.04), transparent);
  background-size: 400px 400px, 350px 350px, 250px 250px;
  pointer-events: none;
  opacity: .6;
}
.hero-inner {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

/* 版本更新胶囊 */
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px 7px 14px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: var(--sp-7);
  font-weight: 500;
  text-decoration: none !important;
  box-shadow: var(--shadow-sm);
  transition: all .2s ease;
}
.hero-tag:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.hero-tag .ht-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  flex: none;
  animation: pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(.85); }
}
.hero-tag .ht-text { color: var(--text); }
.hero-tag svg { width: 14px; height: 14px; flex: none; opacity: .6; transition: all .18s; }
.hero-tag:hover svg { opacity: 1; transform: translateX(2px); color: var(--accent); }

/* 品牌图标（真实 logo，置于标题上方） */
.hero-mark {
  width: 68px;
  height: 68px;
  display: block;
  margin: 0 auto var(--sp-5);
  border-radius: 16px;
  box-shadow: 0 10px 28px rgba(20,20,19,.18), inset 0 0 0 1px rgba(255,255,255,.06);
  animation: bob 4s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}
@media (prefers-color-scheme: dark) {
  .hero-mark { box-shadow: 0 10px 28px rgba(0,0,0,.55), inset 0 0 0 1px rgba(255,255,255,.08); }
}

/* 大衬线 H1（居中） */
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5.6vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--sp-5);
  letter-spacing: -.02em;
  color: var(--text);
}
.hero h1 .hl {
  position: relative;
  color: var(--accent-deep);
}
.hero h1 .hl::after {
  content: "";
  position: absolute;
  left: -4px; right: -4px; bottom: 4px; height: 14px;
  background: var(--accent-soft);
  border-radius: 3px;
  z-index: -1;
}

/* 副标题（居中） */
.hero .lede {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--text-2);
  max-width: 640px;
  margin: 0 auto var(--sp-7);
  line-height: 1.9;
}

/* 两药丸 CTA */
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--sp-6);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all .18s ease;
  background: var(--surface);
  color: var(--text);
  text-decoration: none !important;
  font-family: var(--font);
}
.btn:hover { border-color: var(--border-strong); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn.primary {
  background: var(--text);
  color: var(--bg-alt);
  border-color: var(--text);
}
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: var(--bg-alt); }
.btn.ghost { background: transparent; }
.btn svg { width: 16px; height: 16px; }

/* Hero 底部状态条 */
.hero-meta {
  display: flex;
  gap: var(--sp-6);
  font-size: 13px;
  color: var(--text-3);
  justify-content: center;
  flex-wrap: wrap;
}
.hero-meta .hm-item { display: flex; align-items: center; gap: 7px; }
.hero-meta .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }

/* 产品预览 SVG（居中、更大） */
.hero-preview {
  position: relative;
  margin: var(--sp-8) auto 0;
  max-width: 820px;
  padding: 14px;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 12px 48px rgba(20,20,19,.10), 0 2px 8px rgba(20,20,19,.04);
}
.hero-preview::before {
  content: "";
  position: absolute; inset: -1px;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(135deg, var(--accent) 0%, transparent 40%, transparent 60%, var(--border-strong) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.hero-preview img { width: 100%; height: auto; display: block; border-radius: 8px; }

/* 产品预览：桌面版 / 手机版二选一显示 */
.hero-preview .hp-desktop { display: block; }
.hero-preview .hp-mobile { display: none; }
.hero-preview .hp-mobile-note { display: none; }

/* ---------- 通用 Section（交替背景制造节奏） ---------- */
.section {
  padding: var(--sp-9) 24px;
}
.section.inner { max-width: var(--maxw); margin: 0 auto; }
.bg-alt { background: var(--bg-alt); }
.bg-muted { background: var(--bg-muted); }

.section-head {
  margin-bottom: var(--sp-8);
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}
.section-head .eyebrow {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: var(--sp-3);
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  margin: 0 0 var(--sp-3);
  line-height: 1.28;
  letter-spacing: -.02em;
  color: var(--text);
}
.section-head p {
  font-size: 15.5px;
  color: var(--text-2);
  margin: 0;
  line-height: 1.85;
}

/* ---------- Quick Start：4 卡片并排 ---------- */
.deploy-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 960px;
  margin: 0 auto;
}
.deploy-card {
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 28px 18px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  font-family: var(--font);
  transition: all .22s ease;
  color: var(--text);
}
.deploy-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(20,20,19,.08);
}
.deploy-card.on {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.deploy-card .dc-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius);
}
.deploy-card .dc-icon svg { width: 24px; height: 24px; }
.deploy-card .dc-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  margin-top: 2px;
}
.deploy-card .dc-desc {
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.6;
  max-width: 160px;
}
.deploy-card .dc-expand {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  margin-top: auto;
  padding-top: 8px;
}

.deploy-panes { margin-top: var(--sp-7); }
.deploy-pane { display: none; }
.deploy-pane.on { display: block; animation: fade-pane .25s ease; }
@keyframes fade-pane {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.code-wrap {
  max-width: 760px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.code-block {
  position: relative;
  margin: 0;
  padding: 24px 28px;
  background: #1a1b26;
  font-size: 13px;
  line-height: 1.95;
  overflow-x: auto;
  color: #c0caf5;
  font-family: var(--mono);
}
.code-block .prompt { color: var(--accent); }
.code-block .cmt { color: #565f89; font-style: italic; }
.code-block .kw { color: #c0caf5; }
.code-block .copy-btn {
  position: absolute;
  top: 12px; right: 12px;
  padding: 6px 14px;
  font-size: 11.5px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  color: #a9b1d6;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font);
  opacity: 0;
  transition: all .18s;
}
.code-block:hover .copy-btn { opacity: 1; }
.copy-btn.copied {
  background: var(--ok);
  color: #fff;
  border-color: var(--ok);
  opacity: 1;
}

/* ---------- 价值主张 ---------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-card {
  padding: 36px 30px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all .22s ease;
  position: relative;
}
.value-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.value-card .vc-num {
  font-family: var(--font-display);
  font-size: 48px;
  line-height: 1;
  color: var(--accent);
  opacity: .3;
  margin-bottom: var(--sp-4);
  font-weight: 700;
}
.value-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 var(--sp-2);
  color: var(--text);
}
.value-card p {
  font-size: 14px;
  color: var(--text-2);
  margin: 0;
  line-height: 1.85;
}

/* ---------- 频道墙 ---------- */
.channels-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.ch-item {
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all .22s ease;
}
.ch-item:hover {
  border-color: var(--accent);
  background: var(--surface-hi);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.ch-item .ch-icon {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius);
}
.ch-item .ch-icon svg { width: 22px; height: 22px; }
.ch-item .ch-name {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text);
}
.ch-item .ch-tag {
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: .04em;
}

/* ---------- 功能场景（全宽分区段，交替背景） ---------- */
.scene {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-9);
  align-items: center;
  padding: var(--sp-8) 0;
}
.scene.reverse { direction: rtl; padding-top: var(--sp-9); }
.scene.reverse > * { direction: ltr; }
.scene-copy .eyebrow {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: var(--sp-3);
}
.scene-copy h3 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  margin: 0 0 var(--sp-4);
  line-height: 1.35;
  letter-spacing: -.01em;
}
.scene-copy p {
  font-size: 15.5px;
  color: var(--text-2);
  margin: 0 0 var(--sp-5);
  line-height: 1.9;
}
.scene-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sp-3); }
.scene-list li {
  display: flex; align-items: flex-start; gap: var(--sp-3);
  font-size: 14.5px; color: var(--text-2);
}
.scene-list .sl-dot {
  width: 20px; height: 20px; flex: none;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
}

.scene-visual {
  aspect-ratio: 4 / 3;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: grid; place-items: center;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.scene-visual svg { width: 100%; height: 100%; }

/* ---------- 三端协作 ---------- */
.trio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}
.trio {
  padding: 34px 30px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all .22s ease;
}
.trio:hover { border-color: var(--border-strong); box-shadow: var(--shadow); transform: translateY(-2px); }
.trio .t-head {
  display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4);
}
.trio .t-ic {
  width: 46px; height: 46px; flex: none;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
  border-radius: var(--radius);
}
.trio .t-ic svg { width: 22px; height: 22px; }
.trio .t-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}
.trio .t-sub {
  font-size: 11.5px;
  color: var(--accent);
  letter-spacing: .08em;
  font-weight: 600;
}
.trio p {
  font-size: 14.5px;
  color: var(--text-2);
  margin: 0 0 var(--sp-4);
  line-height: 1.85;
}
.trio .t-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.trio .t-tag {
  font-size: 11.5px;
  padding: 4px 12px;
  background: var(--bg-muted);
  color: var(--text-2);
  border-radius: 999px;
  border: 1px solid transparent;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-muted);
  border-top: 1px solid var(--border);
  padding: var(--sp-8) 24px var(--sp-6);
}
.footer-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--sp-8);
  padding-bottom: var(--sp-7);
  border-bottom: 1px solid var(--border);
}
.footer-brand .brand-lg {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: var(--sp-4);
}
.footer-brand .brand-lg .bm {
  width: 36px; height: 36px;
  display: block;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(20,20,19,.12), inset 0 0 0 1px rgba(20,20,19,.06);
  overflow: hidden;
}
.footer-brand .brand-lg .bm img { width: 100%; height: 100%; display: block; object-fit: cover; }
.footer-brand .brand-lg b {
  font-family: var(--font-display);
  font-size: 18px; font-weight: 700;
}
.footer-brand p {
  font-size: 13.5px;
  color: var(--text-2);
  margin: 0 0 var(--sp-4);
  line-height: 1.85;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--text);
  text-transform: uppercase;
  margin: 0 0 var(--sp-4);
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sp-3); }
.footer-col a {
  font-size: 13.5px;
  color: var(--text-2);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: var(--sp-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
  font-size: 12.5px;
  color: var(--text-3);
}
.footer-bottom a { color: var(--text-2); }
.footer-bottom a:hover { color: var(--accent); }
.social-links { display: flex; gap: 10px; }
.social-links a {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-2);
  transition: all .18s;
}
.social-links a:hover { color: var(--bg-alt); background: var(--accent); border-color: var(--accent); }
.social-links svg { width: 16px; height: 16px; }

/* ---------- 滚动渐入 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease-out, transform .6s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .section-head h2 { font-size: clamp(26px, 3.4vw, 36px); }
  .deploy-cards { grid-template-columns: repeat(2, 1fr); max-width: 560px; }
  .value-grid { grid-template-columns: 1fr; gap: var(--sp-4); }
  .channels-grid { grid-template-columns: repeat(3, 1fr); }
  .scene { grid-template-columns: 1fr; gap: var(--sp-6); }
  .scene.reverse { direction: ltr; }
  .scene-visual { aspect-ratio: 16 / 10; max-width: 520px; margin: 0 auto; }
  .trio-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .hero h1 { font-size: clamp(32px, 5vw, 50px); }
  .hero-preview { max-width: 640px; }
}

/* ============================================================
   手机版（≤768px）：独立排版，不是桌面版的缩小
   - Hero 展示手机端截图（不再塞桌面截图）
   - 导航收成汉堡菜单 + 底部常驻操作条
   - 所有卡片单/双列，触控目标 ≥44px
   ============================================================ */
@media (max-width: 768px) {
  /* ---- 导航：更紧凑，汉堡右置 ---- */
  .nav-inner {
    padding: 12px 18px;
    gap: 12px;
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
  }
  .brand .bm { width: 30px; height: 30px; border-radius: 7px; }
  .brand .bt b { font-size: 15px; }
  .brand .bt span { font-size: 9.5px; letter-spacing: .06em; }
  .nav-toggle {
    display: inline-flex;
    width: 44px; height: 44px;
    margin-left: auto;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 14px 18px calc(18px + env(safe-area-inset-bottom, 0px));
    gap: 4px;
    box-shadow: 0 12px 32px rgba(20,20,19,.12);
  }
  .nav-links.open { display: flex; }
  .nav-links > a {
    padding: 14px 12px;
    font-size: 15px;
    border-radius: var(--radius);
    min-height: 48px;
    display: flex;
    align-items: center;
  }
  .nav-links > a:active { background: var(--bg-muted); }
  .nav-links .nav-doc,
  .nav-links .nav-cta {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    margin-top: 6px;
  }
  .nav-download { width: 100%; margin-top: 6px; }
  .nav-download-btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    font-size: 15px;
    border-radius: var(--radius);
  }
  .nav-download.open .nav-download-btn {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }
  .nav-download-menu {
    position: static;
    width: 100%;
    margin-top: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 6px;
    display: none;
  }
  .nav-download.open .nav-download-menu { display: block; }
  .ndm-item { padding: 12px; min-height: 56px; }

  /* ---- Hero：紧凑居中，展示手机端截图 ---- */
  .hero {
    padding: 36px 18px 44px;
  }
  .hero-tag {
    font-size: 12px;
    padding: 6px 14px 6px 12px;
    margin-bottom: 26px;
    max-width: calc(100vw - 56px);
  }
  .hero-tag .ht-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .hero-mark {
    width: 52px; height: 52px;
    border-radius: 13px;
    margin-bottom: 16px;
    animation: none;
  }
  .hero h1 {
    font-size: 30px;
    line-height: 1.28;
    margin-bottom: 14px;
    letter-spacing: -.01em;
  }
  .hero h1 .hl::after { height: 10px; bottom: 2px; }
  .hero .lede {
    font-size: 14.5px;
    line-height: 1.85;
    margin-bottom: 26px;
    padding: 0 2px;
  }
  .hero .lede br { display: none; }

  /* CTA：整行堆叠，触控友好 */
  .hero-cta {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 22px;
  }
  .hero-cta .btn {
    width: 100%;
    justify-content: center;
    min-height: 50px;
    font-size: 15px;
    padding: 14px 20px;
  }

  /* 状态条：2×2 网格 */
  .hero-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px 12px;
    font-size: 12.5px;
    text-align: left;
    padding: 0 6px;
  }
  .hero-meta .hm-item {
    gap: 6px;
    padding: 6px 0;
  }

  /* 产品预览：手机截图三联 */
  .hero-preview {
    margin-top: 32px;
    padding: 12px 10px;
    border-radius: 16px;
    max-width: 100%;
  }
  .hero-preview .hp-desktop { display: none; }
  .hero-preview .hp-mobile {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: flex-end;
  }
  .hero-preview .hp-mobile img {
    width: calc((100% - 16px) / 3);
    height: auto;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(20,20,19,.14);
    display: block;
  }
  /* 中间那张抬高一点，形成层次 */
  .hero-preview .hp-mobile img:nth-child(2) {
    width: calc((100% - 16px) / 3);
    transform: translateY(-6px);
  }
  .hero-preview .hp-mobile-note {
    display: block;
    text-align: center;
    font-size: 11.5px;
    color: var(--text-3);
    margin-top: 12px;
    letter-spacing: .02em;
  }

  /* ---- Section 通用 ---- */
  .section { padding: 44px 18px; }
  .section-head { margin-bottom: 30px; padding: 0 4px; }
  .section-head .eyebrow { font-size: 11px; letter-spacing: .18em; margin-bottom: 10px; }
  .section-head h2 { font-size: 25px; line-height: 1.35; margin-bottom: 10px; }
  .section-head p { font-size: 14px; line-height: 1.8; }

  /* ---- 快速开始：2 列小卡 ---- */
  .deploy-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-width: 100%;
  }
  .deploy-card {
    aspect-ratio: auto;
    padding: 20px 12px 16px;
    gap: 8px;
    border-radius: var(--radius);
    border-width: 1px;
    min-height: 132px;
  }
  .deploy-card:active { transform: scale(.985); }
  .deploy-card .dc-icon { width: 40px; height: 40px; }
  .deploy-card .dc-icon svg { width: 20px; height: 20px; }
  .deploy-card .dc-title { font-size: 14px; line-height: 1.3; }
  .deploy-card .dc-desc { font-size: 11.5px; line-height: 1.5; max-width: 100%; }
  .deploy-card .dc-expand { font-size: 11.5px; padding-top: 4px; }

  /* ---- 代码块：小字号 + 横向滚动 + 常驻复制按钮 ---- */
  .deploy-panes { margin-top: 22px; }
  .code-wrap { border-radius: var(--radius); }
  .code-block {
    padding: 42px 14px 16px;
    font-size: 11.5px;
    line-height: 1.85;
    -webkit-overflow-scrolling: touch;
  }
  .code-block .copy-btn {
    top: 8px; right: 8px;
    opacity: 1;
    padding: 7px 14px;
    font-size: 11.5px;
    min-height: 32px;
  }

  /* ---- 价值主张 ---- */
  .value-grid { gap: 12px; }
  .value-card {
    padding: 22px 18px;
    border-radius: var(--radius);
  }
  .value-card .vc-num { font-size: 34px; margin-bottom: 10px; }
  .value-card h3 { font-size: 17px; margin-bottom: 6px; }
  .value-card p { font-size: 13.5px; line-height: 1.8; }

  /* ---- 频道墙：2 列，横向卡片 ---- */
  .channels-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .ch-item {
    aspect-ratio: auto;
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    grid-template-rows: auto auto;
    align-content: center;
    column-gap: 10px;
    row-gap: 1px;
    padding: 14px 12px;
    text-align: left;
    border-radius: var(--radius);
    min-height: 64px;
  }
  .ch-item .ch-icon {
    width: 38px; height: 38px;
    grid-row: 1 / span 2;
    align-self: center;
    border-radius: var(--radius);
  }
  .ch-item .ch-icon svg { width: 19px; height: 19px; }
  .ch-item .ch-name {
    grid-column: 2;
    font-size: 13px;
    line-height: 1.35;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .ch-item .ch-tag {
    grid-column: 2;
    font-size: 10.5px;
    line-height: 1.35;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* ---- 场景：单列，SVG 在文案下方 ---- */
  .scene,
  .scene.reverse {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 26px 0;
  }
  .scene.reverse { direction: ltr; }
  .scene-copy .eyebrow { font-size: 11px; letter-spacing: .18em; }
  .scene-copy h3 { font-size: 22px; line-height: 1.4; margin-bottom: 12px; }
  .scene-copy p { font-size: 14px; line-height: 1.85; margin-bottom: 16px; }
  .scene-list { gap: 10px; }
  .scene-list li { font-size: 13.5px; line-height: 1.7; }
  .scene-list .sl-dot { width: 18px; height: 18px; font-size: 10px; }
  .scene-visual {
    aspect-ratio: 16 / 11;
    padding: 10px;
    max-width: 100%;
    border-radius: var(--radius);
  }
  .scene + .scene { padding-top: 26px; }

  /* ---- 三端协作 ---- */
  .trio-grid { gap: 12px; }
  .trio {
    padding: 22px 18px;
    border-radius: var(--radius);
  }
  .trio .t-head { gap: 12px; margin-bottom: 12px; }
  .trio .t-ic { width: 40px; height: 40px; }
  .trio .t-ic svg { width: 20px; height: 20px; }
  .trio .t-title { font-size: 16px; }
  .trio .t-sub { font-size: 10.5px; }
  .trio p { font-size: 13.5px; line-height: 1.8; margin-bottom: 14px; }
  .trio .t-tag { font-size: 11px; padding: 4px 10px; }

  /* ---- Footer ---- */
  .footer {
    padding: 36px 18px calc(24px + env(safe-area-inset-bottom, 0px));
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
    padding-bottom: 26px;
  }
  .footer-brand p { font-size: 13px; max-width: 100%; }
  .footer-col h4 { font-size: 11.5px; margin-bottom: 12px; }
  .footer-col ul { gap: 2px; }
  .footer-col a {
    display: flex;
    align-items: center;
    min-height: 40px;
    font-size: 13.5px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    font-size: 12px;
    padding-top: 18px;
  }
  .social-links a { width: 44px; height: 44px; }

  /* 手机端底部留出常驻操作条的高度 */
  body { padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px)); }

  /* 触屏设备不做 hover 位移动画（避免点击后卡住） */
  .deploy-card:hover,
  .value-card:hover,
  .ch-item:hover,
  .trio:hover,
  .hero-tag:hover,
  .btn:hover {
    transform: none;
  }

  .fade-in { transform: translateY(14px); }
}

/* ---- 手机端底部常驻操作条 ---- */
.mobile-bar { display: none; }
@media (max-width: 768px) {
  .mobile-bar {
    display: flex;
    position: fixed;
    left: 0; right: 0;
    bottom: 0;
    z-index: 90;
    gap: 8px;
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
    background: color-mix(in srgb, var(--bg-alt) 92%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
  }
  .mobile-bar a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 46px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    color: var(--text);
    background: var(--surface);
  }
  .mobile-bar a.mb-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    flex: 1.4;
  }
  .mobile-bar a.mb-primary:active { background: var(--accent-deep); }
  .mobile-bar svg { width: 16px; height: 16px; flex: none; }
}

/* ---- 小屏（≤400px）微调 ---- */
@media (max-width: 400px) {
  .hero h1 { font-size: 26px; }
  .hero .lede { font-size: 13.5px; }
  .section-head h2 { font-size: 22px; }
  .deploy-card { padding: 16px 10px 14px; min-height: 124px; }
  .deploy-card .dc-desc { font-size: 11px; }
  .ch-item { grid-template-columns: 34px minmax(0, 1fr); padding: 12px 10px; min-height: 58px; }
  .ch-item .ch-icon { width: 34px; height: 34px; }
  .code-block { font-size: 11px; }
}