/* ============================================================
   巴特星球 ByteVerse — AI 价值网络官网
   风格：深空暗色 + 霓虹渐变 + 玻璃拟态
   ============================================================ */

:root {
  --bg: #05070f;
  --bg-soft: #090d1c;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #eef1fb;
  --muted: #9aa3bd;
  --muted-2: #6b7490;
  --violet: #7c3aed;
  --violet-light: #a78bfa;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --amber: #fbbf24;
  --rose: #fb7185;
  --green: #34d399;
  --grad-main: linear-gradient(135deg, #7c3aed 0%, #3b82f6 50%, #22d3ee 100%);
  --grad-text: linear-gradient(92deg, #a78bfa 0%, #60a5fa 45%, #22d3ee 100%);
  --radius: 18px;
  --radius-sm: 12px;
  --header-h: 72px;
  --shadow-glow: 0 0 40px rgba(124, 58, 237, 0.28);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }

body {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(124, 58, 237, 0.55); color: #fff; }

a { color: inherit; text-decoration: none; }
/* 页面直达链接：桌面隐藏，仅移动端抽屉内可见 */
.main-nav .nav-page-link { display: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 8px;
}
.skip-link {
  position: fixed; top: -64px; left: 16px; z-index: 300;
  padding: 10px 18px; border-radius: 10px;
  background: var(--violet); color: #fff; font-size: 14px;
  transition: top 0.25s ease;
}
.skip-link:focus { top: 12px; }
body.menu-open { overflow: hidden; }
img, svg { display: inline-block; vertical-align: middle; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- 背景层 ---------- */
#starfield {
  position: fixed; inset: 0; z-index: -3;
  width: 100%; height: 100%;
}

.bg-orbs { position: fixed; inset: 0; z-index: -2; pointer-events: none; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(110px); opacity: 0.32; }
.orb-1 { width: 560px; height: 560px; background: #4c1d95; top: -180px; left: -140px; animation: orbFloat 22s ease-in-out infinite; }
.orb-2 { width: 480px; height: 480px; background: #0e7490; top: 34%; right: -180px; animation: orbFloat 26s ease-in-out infinite reverse; }
.orb-3 { width: 520px; height: 520px; background: #1d4ed8; bottom: -220px; left: 30%; animation: orbFloat 30s ease-in-out infinite 3s; }

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(50px, -40px) scale(1.08); }
  66% { transform: translate(-35px, 45px) scale(0.94); }
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.35s, border-color 0.35s, backdrop-filter 0.35s;
}
.site-header.scrolled {
  background: rgba(6, 9, 20, 0.78);
  backdrop-filter: blur(18px);
  border-bottom-color: var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 28px; }

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo { display: inline-flex; filter: drop-shadow(0 0 12px rgba(124, 58, 237, 0.5)); }
.brand-text {
  font-size: 19px; font-weight: 700; letter-spacing: 1px; line-height: 1.15;
  display: flex; flex-direction: column;
}
.brand-text small {
  font-size: 9px; font-weight: 500; letter-spacing: 4px; color: var(--muted-2);
}

.main-nav { display: flex; gap: 4px; margin-left: 26px; }
.main-nav a {
  padding: 8px 13px; border-radius: 10px;
  font-size: 14.5px; color: var(--muted);
  transition: color 0.25s, background 0.25s;
}
.main-nav a:hover, .main-nav a.active { color: var(--text); background: rgba(255, 255, 255, 0.06); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

/* 导航下拉菜单（项目介绍 / 组织介绍） */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
}
.nav-caret {
  width: 9px; height: 9px; border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-2px); transition: transform 0.25s;
}
.nav-dropdown:hover .nav-caret,
.nav-dropdown:focus-within .nav-caret { transform: rotate(225deg) translateY(-2px); }
.nav-dropdown-menu {
  position: absolute; top: calc(100% + 12px); left: 0; right: 0;
  display: flex; flex-direction: column; gap: 4px; padding: 6px;
  background: rgba(9, 13, 28, 0.96); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); box-shadow: 0 18px 44px rgba(0, 0, 0, 0.5);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.22s, transform 0.22s, visibility 0.22s; z-index: 60;
}
/* 悬停缝隙过渡，避免鼠标移向菜单时断开 */
.nav-dropdown-menu::before {
  content: ""; position: absolute; top: -12px; left: 0; right: 0; height: 12px;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-dropdown-menu a {
  padding: 7px 12px; border-radius: 8px; white-space: nowrap;
  font-size: 14px; color: var(--muted); transition: color 0.2s, background 0.2s;
}
.nav-dropdown-menu a:hover { color: var(--text); background: rgba(255, 255, 255, 0.07); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 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; color: var(--text);
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad-main); background-size: 160% 160%;
  box-shadow: 0 8px 26px rgba(94, 58, 237, 0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 34px rgba(34, 211, 238, 0.35); background-position: 100% 50%; }
.btn-ghost {
  background: rgba(124, 58, 237, 0.10);
  border-color: rgba(167, 139, 250, 0.65);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: rgba(167, 139, 250, 0.6); background: rgba(124, 58, 237, 0.14); }
.btn-sm { padding: 9px 20px; font-size: 13.5px; }

/* Hero 文字链接 */
.hero-link {
  font-size: 14.5px; font-weight: 500; color: var(--cyan);
  text-decoration: underline; text-underline-offset: 5px; text-decoration-color: rgba(34, 211, 238, 0.4);
  transition: color 0.25s, text-decoration-color 0.25s;
}
.hero-link:hover { color: #67e8f9; text-decoration-color: #67e8f9; }

/* 点击提示气泡（联系秘书获取）：页面居中显示 */
.secretary-toast {
  position: fixed; left: 50%; top: 50%; transform: translate(-50%, calc(-50% + 14px));
  max-width: min(90vw, 480px); padding: 16px 28px; border-radius: 12px;
  border: 1px solid rgba(124, 58, 237, 0.5); background: rgba(11, 16, 32, 0.96);
  color: var(--text); font-size: 14px; line-height: 1.6; text-align: center;
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.5);
  opacity: 0; visibility: hidden; z-index: 90;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}
.secretary-toast.show { opacity: 1; visibility: visible; transform: translate(-50%, -50%); }

/* ---------- Hero ---------- */
.hero { padding: calc(var(--header-h) + 84px) 0 70px; text-align: center; position: relative; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px; border-radius: 999px;
  font-size: 13px; color: var(--violet-light); letter-spacing: 1px;
  border: 1px solid rgba(124, 58, 237, 0.45);
  background: rgba(124, 58, 237, 0.12);
}
.hero-badge::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 10px var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero-title {
  margin-top: 26px;
  font-size: clamp(36px, 6vw, 66px);
  font-weight: 800; letter-spacing: 2px; line-height: 1.25;
}
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 26px rgba(96, 165, 250, 0.35));
}

.hero-formula {
  margin-top: 22px; font-size: clamp(14px, 2vw, 18px);
  color: var(--muted); letter-spacing: 1px;
}
.hero-formula i { font-style: normal; color: var(--cyan); margin: 0 6px; opacity: 0.85; }

.hero-desc {
  max-width: 860px; margin: 18px auto 0;
  color: var(--muted); font-size: 15.5px;
}

.hero-actions { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.hero-slogans {
  margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  font-size: 13.5px; letter-spacing: 2px; color: var(--muted-2);
}
.hero-slogans em { font-style: normal; color: rgba(255, 255, 255, 0.16); }

.hero-stats {
  margin: 46px auto 0; max-width: 820px;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); backdrop-filter: blur(10px);
  overflow: hidden;
}
.stat { padding: 22px 10px; border-right: 1px solid var(--border); }
.stat:last-child { border-right: 0; }
.stat b {
  display: block; font-size: 30px; font-weight: 800;
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat span { font-size: 12.5px; color: var(--muted-2); letter-spacing: 1px; }

/* ---------- 跑马灯 ---------- */
.ticker {
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden; padding: 14px 0; position: relative;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track {
  display: flex; gap: 34px; width: max-content;
  animation: tickerMove 36s linear infinite;
}
.ticker-track span { font-size: 14px; color: var(--muted); letter-spacing: 2px; white-space: nowrap; }
.ticker-track i { font-style: normal; color: var(--violet-light); opacity: 0.55; font-size: 9px; align-self: center; }
@keyframes tickerMove { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 通用 Section ---------- */
.section { padding: 96px 0; position: relative; }
.section-alt { background: rgba(255, 255, 255, 0.016); border-top: 1px solid rgba(255, 255, 255, 0.05); border-bottom: 1px solid rgba(255, 255, 255, 0.05); }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-tag {
  font-size: 12px; letter-spacing: 4px; font-weight: 600;
  color: var(--cyan); text-transform: uppercase; margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: 1px; }
.section-head h2 .grad-text { margin-left: 8px; }
.section-head p { margin-top: 16px; color: var(--muted); font-size: 15px; }

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

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  backdrop-filter: blur(12px);
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s, background 0.35s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(167, 139, 250, 0.55), transparent);
  opacity: 0; transition: opacity 0.35s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(124, 58, 237, 0.5);
  background: var(--panel-strong);
  box-shadow: 0 18px 46px rgba(3, 6, 18, 0.6), 0 0 34px rgba(124, 58, 237, 0.14);
}
.card:hover::before { opacity: 1; }
.card h3 { font-size: 19px; font-weight: 700; margin: 18px 0 10px; letter-spacing: 0.5px; }
.card p { color: var(--muted); font-size: 14px; }

.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-strong);
}
.icon-violet { color: var(--violet-light); background: rgba(124, 58, 237, 0.14); }
.icon-cyan { color: var(--cyan); background: rgba(34, 211, 238, 0.12); }
.icon-blue { color: #60a5fa; background: rgba(59, 130, 246, 0.14); }
.icon-amber { color: var(--amber); background: rgba(251, 191, 36, 0.1); }
.icon-rose { color: var(--rose); background: rgba(251, 113, 133, 0.12); }
.icon-green { color: var(--green); background: rgba(52, 211, 153, 0.1); }

.card-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.card-tags span {
  font-size: 12px; padding: 3px 11px; border-radius: 999px;
  color: var(--muted); border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.link-more {
  display: inline-block; margin-top: 14px; font-size: 13.5px; font-weight: 600;
  color: var(--cyan); transition: letter-spacing 0.25s;
}
.link-more:hover { letter-spacing: 1px; }
.product-card .link-more + .link-more { margin-left: 18px; }

/* ---------- 价值飞轮 ---------- */
.flywheel {
  margin-top: 60px; padding: 36px 30px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(124, 58, 237, 0.09), rgba(34, 211, 238, 0.05));
}
.flywheel-title {
  text-align: center; font-size: 15px; font-weight: 700; letter-spacing: 3px;
  color: var(--violet-light); margin-bottom: 26px;
}
.flywheel-flow {
  display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap;
}
.fly-node {
  padding: 14px 20px; border-radius: 14px; text-align: center;
  font-weight: 700; font-size: 15px;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border-strong);
}
.fly-node div { font-size: 11.5px; font-weight: 400; color: var(--muted-2); margin-top: 2px; }
.fly-arrow { color: var(--cyan); font-size: 20px; opacity: 0.85; animation: arrowGlow 1.8s ease-in-out infinite; }
@keyframes arrowGlow { 0%, 100% { opacity: 0.35; } 50% { opacity: 1; } }
.fly-back {
  margin-top: 14px; width: 100%; text-align: center;
  font-size: 13px; color: var(--violet-light); letter-spacing: 2px;
}
.flywheel-note { margin-top: 18px; text-align: center; color: var(--muted); font-size: 13.5px; }
.flywheel-note b { color: var(--text); }

/* ---------- 三层架构 ---------- */
.arch-stack { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.arch-layer {
  display: grid; grid-template-columns: 200px 1fr; gap: 24px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); backdrop-filter: blur(10px);
  padding: 26px 28px; align-items: center;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.arch-layer:hover { transform: translateX(6px); border-color: rgba(34, 211, 238, 0.45); box-shadow: -6px 0 26px rgba(34, 211, 238, 0.12); }
.arch-layer[data-layer="app"] { border-left: 3px solid var(--rose); }
.arch-layer[data-layer="os"] { border-left: 3px solid var(--violet-light); }
.arch-layer[data-layer="infra"] { border-left: 3px solid var(--cyan); }
.arch-label { font-size: 17px; font-weight: 700; letter-spacing: 1px; }
.arch-label b {
  display: block; font-size: 12px; letter-spacing: 3px; color: var(--muted-2); margin-bottom: 4px;
}
.arch-body p { color: var(--muted); font-size: 14px; }

.concept-chips {
  margin-top: 46px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
.concept {
  padding: 16px 20px; border-radius: var(--radius-sm);
  border: 1px dashed rgba(255, 255, 255, 0.14);
  font-size: 14.5px; font-weight: 700; letter-spacing: 1px;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.3s, background 0.3s;
}
.concept:hover { border-color: var(--cyan); background: rgba(34, 211, 238, 0.06); }
.concept small { display: block; margin-top: 5px; font-weight: 400; font-size: 12px; color: var(--muted-2); letter-spacing: 0; }

/* ---------- 业务架构条 ---------- */
.biz-strip {
  margin-top: 50px; padding: 22px 26px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.biz-title {
  font-weight: 700; letter-spacing: 2px; color: var(--violet-light);
  padding-right: 14px; border-right: 1px solid var(--border);
}
.biz-strip span:not(.biz-title) {
  font-size: 13px; color: var(--muted);
  padding: 5px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: rgba(255, 255, 255, 0.03);
}

/* ---------- GPUCloud ---------- */
.gpucloud-section { padding-top: 40px; }
.gpucloud-panel {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center;
  border: 1px solid rgba(34, 211, 238, 0.28); border-radius: 24px;
  padding: 52px 50px;
  background:
    radial-gradient(600px 300px at 85% 50%, rgba(34, 211, 238, 0.1), transparent 70%),
    linear-gradient(140deg, rgba(124, 58, 237, 0.14), rgba(9, 13, 28, 0.6));
  box-shadow: var(--shadow-glow);
}
.gpucloud-info .section-tag { color: var(--cyan); }
.gpucloud-info h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 800; letter-spacing: 1px; }
.gpucloud-info > p { margin-top: 16px; color: var(--muted); font-size: 14.5px; }
.check-list { list-style: none; margin: 22px 0 30px; display: grid; gap: 11px; }
.check-list li { position: relative; padding-left: 28px; color: var(--text); font-size: 14.5px; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 19px; height: 19px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; color: #05070f; background: var(--cyan);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.55);
}

.gpucloud-visual { position: relative; height: 340px; display: flex; align-items: center; justify-content: center; }
.gc-ring {
  position: absolute; border-radius: 50%;
  border: 1px dashed rgba(34, 211, 238, 0.35);
}
.gc-ring-1 { width: 160px; height: 160px; animation: spin 14s linear infinite; }
.gc-ring-2 { width: 240px; height: 240px; border-color: rgba(167, 139, 250, 0.3); animation: spin 22s linear infinite reverse; }
.gc-ring-3 { width: 320px; height: 320px; border-color: rgba(255, 255, 255, 0.12); animation: spin 32s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.gc-core {
  width: 108px; height: 108px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; text-align: center;
  font-weight: 800; font-size: 17px; letter-spacing: 1px; line-height: 1.3;
  background: var(--grad-main);
  box-shadow: 0 0 46px rgba(124, 58, 237, 0.55), inset 0 0 24px rgba(255, 255, 255, 0.25);
  animation: coreBreathe 3.4s ease-in-out infinite;
}
@keyframes coreBreathe { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.07); } }
.gc-node {
  position: absolute; width: 10px; height: 10px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 12px var(--cyan);
  animation: nodeFloat 4.5s ease-in-out infinite;
}
.gc-node.n1 { top: 12%; left: 24%; }
.gc-node.n2 { top: 8%; right: 28%; animation-delay: 0.7s; background: var(--violet-light); box-shadow: 0 0 12px var(--violet-light); }
.gc-node.n3 { bottom: 18%; left: 10%; animation-delay: 1.4s; }
.gc-node.n4 { bottom: 10%; right: 16%; animation-delay: 2.1s; background: var(--rose); box-shadow: 0 0 12px var(--rose); }
.gc-node.n5 { top: 46%; left: 2%; animation-delay: 2.8s; }
.gc-node.n6 { top: 40%; right: 2%; animation-delay: 3.5s; background: var(--amber); box-shadow: 0 0 12px var(--amber); }
@keyframes nodeFloat { 0%, 100% { transform: translateY(0); opacity: 0.65; } 50% { transform: translateY(-12px); opacity: 1; } }

/* ---------- 云平台双栏 ---------- */
.cloud-dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.cloud-panel {
  border: 1px solid rgba(34, 211, 238, 0.22); border-radius: 18px;
  padding: 36px 32px;
  background: linear-gradient(140deg, rgba(124, 58, 237, 0.1), rgba(9, 13, 28, 0.5));
}
.cloud-panel .section-tag { color: var(--cyan); margin-bottom: 10px; }
.cloud-panel h3 { font-size: 22px; font-weight: 800; margin-bottom: 12px; }
.cloud-panel > p { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.cloud-panel .check-list { margin: 0 0 22px; gap: 9px; }
.cloud-panel .check-list li { font-size: 13.5px; }
@media (max-width: 900px) { .cloud-dual-grid { grid-template-columns: 1fr; } }

/* ---------- 下载中心 ---------- */
.dl-alias { font-size: 12.5px !important; color: var(--cyan) !important; letter-spacing: 1px; margin-bottom: 4px; }
.dl-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.dl-head h3 { margin: 0 0 3px; font-size: 18px; }
.dl-head .dl-alias { margin-bottom: 0; }
.card-head { display: flex; align-items: center; gap: 14px; }
.card-head h3 { margin: 0 0 10px; }
.dl-buttons { margin-top: 20px; display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- 开源 ---------- */
.repo-card { display: flex; flex-direction: column; }
.repo-head { display: flex; gap: 16px; align-items: center; margin-bottom: 16px; }
.repo-head .gh-mark { color: var(--text); opacity: 0.9; }
.repo-head h3 { margin: 0; font-size: 21px; }
.repo-sub { font-size: 12.5px; color: var(--muted-2); letter-spacing: 1px; }
.repo-card p { flex: 1; }
.repo-card .btn { margin-top: 22px; align-self: flex-start; }

/* ---------- 资料 CTA ---------- */
.docs-cta { padding: 30px 0 96px; }
.docs-panel {
  display: flex; align-items: center; justify-content: space-between; gap: 34px; flex-wrap: wrap;
  padding: 46px 48px; border-radius: 24px;
  border: 1px solid rgba(124, 58, 237, 0.4);
  background:
    radial-gradient(500px 260px at 15% 0%, rgba(124, 58, 237, 0.28), transparent 70%),
    radial-gradient(500px 260px at 90% 100%, rgba(34, 211, 238, 0.16), transparent 70%),
    var(--bg-soft);
}
.docs-panel h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; }
.docs-panel p { margin-top: 10px; color: var(--muted); font-size: 14.5px; max-width: 560px; }
.docs-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 招募合伙人 ---------- */
.partner-grid { grid-template-columns: repeat(3, 1fr); }
.partner-card { display: flex; flex-direction: column; }
.partner-badge {
  position: absolute; top: 18px; right: 18px;
  font-size: 11px; letter-spacing: 2px; padding: 3px 12px; border-radius: 999px;
  color: var(--cyan); border: 1px solid rgba(34, 211, 238, 0.4); background: rgba(34, 211, 238, 0.08);
}
.partner-card h3 { margin-top: 4px; }
.partner-card ul { list-style: none; margin: 14px 0 22px; flex: 1; }
.partner-card li {
  position: relative; padding-left: 18px; margin-bottom: 8px;
  font-size: 13px; color: var(--muted);
}
.partner-card li::before {
  content: ""; position: absolute; left: 2px; top: 9px;
  width: 6px; height: 6px; border-radius: 2px;
  background: var(--grad-main); transform: rotate(45deg);
}
.partner-card .btn { align-self: flex-start; }
.partner-cta {
  border-style: dashed; text-align: center; align-items: center; justify-content: center;
  background: rgba(124, 58, 237, 0.07);
}
.partner-cta h3 { margin-top: 0; }
.partner-cta p { margin-bottom: 20px; }
.secretary-contacts {
  display: flex; flex-direction: column; gap: 10px;
  font-size: 14px; color: var(--muted); text-align: left;
}
.secretary-contacts b { color: var(--text); font-weight: 600; }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.about-card h3 { margin-top: 0; margin-bottom: 14px; font-size: 20px; }
.about-card p + p { margin-top: 10px; }
.about-card a { color: var(--cyan); }
.about-poem {
  margin-top: 18px !important; padding: 14px 18px; border-radius: var(--radius-sm);
  border-left: 3px solid var(--violet-light);
  background: rgba(124, 58, 237, 0.09);
  color: var(--violet-light) !important; letter-spacing: 2px; font-size: 13.5px !important;
}
.job-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.job-tags span {
  font-size: 12.5px; padding: 5px 13px; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.contact-wrap { margin-top: 56px; }
.contact-title { text-align: center; font-size: 24px; font-weight: 800; letter-spacing: 2px; margin-bottom: 30px; }
.contact-grid { grid-template-columns: repeat(3, 1fr); }
.contact-item {
  display: flex; align-items: center; gap: 16px;
  padding: 20px 22px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s, background 0.3s;
}
.contact-item:hover { transform: translateY(-4px); border-color: rgba(34, 211, 238, 0.45); background: var(--panel-strong); }
.contact-icon {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.contact-item b { display: block; font-size: 15px; }
.contact-item span { font-size: 13px; color: var(--muted); word-break: break-all; }
.contact-note { margin-top: 24px; text-align: center; color: var(--muted-2); font-size: 13.5px; }
.contact-note a { color: var(--cyan); }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(4, 6, 14, 0.8);
  backdrop-filter: blur(14px);
  padding: 64px 0 0; margin-top: 40px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 36px;
  padding-bottom: 46px;
}
.footer-brand p { margin-top: 16px; color: var(--muted-2); font-size: 13px; max-width: 280px; }
.footer-col h4 { font-size: 14.5px; letter-spacing: 2px; margin-bottom: 18px; color: var(--text); }
.footer-col a {
  display: block; margin-bottom: 11px; font-size: 13.5px; color: var(--muted);
  transition: color 0.25s, transform 0.25s;
}
.footer-col a:hover { color: var(--cyan); transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 22px 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  text-align: center; font-size: 12.5px; color: var(--muted-2);
}
.footer-links { display: flex; align-items: center; gap: 10px; }
.footer-links a { color: var(--muted-2); }
.footer-links a:hover { color: var(--cyan); }
.footer-links i { font-style: normal; opacity: 0.4; }
.footer-legal {
  border-top: 1px solid var(--border);
  padding: 16px 0 calc(28px + env(safe-area-inset-bottom)); text-align: center;
  font-size: 12px; color: var(--muted-2); line-height: 1.9;
}
.footer-legal p + p { margin-top: 4px; }
.footer-legal a { color: var(--muted-2); text-decoration: underline; text-underline-offset: 3px; }
.footer-legal a:hover { color: var(--cyan); }

/* 下载按钮置灰（即将上线）：保留悬停以显示 title 提示，点击由 JS 拦截 */
.btn-disabled {
  opacity: 0.35; cursor: not-allowed;
  filter: grayscale(1);
}
.btn-disabled:hover { transform: none; border-color: var(--border); background: transparent; }
/* 卡片内小提示 */
.card-note {
  margin-top: 14px; font-size: 12px; color: var(--muted-2); line-height: 1.8;
}

/* ---------- 最新动态 ---------- */
.news-list { display: flex; flex-direction: column; gap: 18px; }
.news-item {
  display: flex; gap: 28px; align-items: flex-start;
  padding: 24px 28px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.news-item:hover { transform: translateY(-3px); border-color: rgba(124, 58, 237, 0.5); }
.news-item time {
  flex-shrink: 0; width: 78px; padding-top: 3px;
  font-size: 15px; font-weight: 700; letter-spacing: 1px;
  background: linear-gradient(90deg, #a78bfa, #22d3ee);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.news-item h3 { font-size: 17px; margin-bottom: 6px; }
.news-item p { font-size: 14px; color: var(--muted); }
.news-tag {
  display: inline-block; margin-top: 10px; padding: 3px 10px;
  font-size: 11.5px; border-radius: 999px;
  color: #a78bfa; border: 1px solid rgba(124, 58, 237, 0.4);
  background: rgba(124, 58, 237, 0.1);
}

/* ---------- 二维码占位 ---------- */
.qr-slot {
  margin-left: auto; flex-shrink: 0;
  width: 76px; height: 76px; border-radius: 10px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  border: 1px dashed var(--border-strong); color: var(--muted-2);
  font-size: 10px; letter-spacing: 0.5px; text-align: center; line-height: 1.3;
  background: rgba(124, 58, 237, 0.06);
}
.qr-slot img { width: 100%; height: 100%; object-fit: cover; border-radius: 9px; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 28px; bottom: calc(32px + env(safe-area-inset-bottom)); z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text); cursor: pointer;
  border: 1px solid var(--border-strong);
  background: rgba(12, 16, 32, 0.8); backdrop-filter: blur(10px);
  opacity: 0; pointer-events: none; transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s, box-shadow 0.3s;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { box-shadow: 0 0 22px rgba(34, 211, 238, 0.4); border-color: var(--cyan); }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 文档页（terms / privacy） ---------- */
.doc-page { padding: calc(var(--header-h) + 70px) 0 90px; }
.doc-panel {
  max-width: 860px; margin: 0 auto;
  border: 1px solid var(--border); border-radius: 22px;
  background: var(--panel); backdrop-filter: blur(12px);
  padding: 50px 56px;
}
.doc-panel h1 { font-size: 30px; font-weight: 800; letter-spacing: 1px; }
.doc-update { margin-top: 10px; margin-bottom: 28px; font-size: 13px; color: var(--muted-2); }
.doc-panel h2 {
  font-size: 18px; margin: 30px 0 10px; padding-left: 12px;
  border-left: 3px solid var(--violet-light); letter-spacing: 1px;
}
.doc-panel p, .doc-panel li { color: var(--muted); font-size: 14.5px; }
.doc-panel ul, .doc-panel ol { padding-left: 22px; margin: 8px 0; }
.doc-panel li { margin-bottom: 6px; }
.doc-panel a { color: var(--cyan); }
.doc-back { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 26px; color: var(--muted); font-size: 14px; }
.doc-back:hover { color: var(--cyan); }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .nav-inner { gap: 16px; }
  .main-nav a { padding: 8px 9px; font-size: 13.5px; }
}

@media (max-width: 1080px) {
  .grid-3, .grid-4, .partner-grid, .about-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .concept-chips { grid-template-columns: repeat(2, 1fr); }
  .gpucloud-panel { grid-template-columns: 1fr; padding: 40px 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  /* 导航折叠为抽屉 */
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 2px; padding: 14px 5%;
    background: rgba(6, 9, 20, 0.96); backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-130%); transition: transform 0.35s ease;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { padding: 13px 14px; font-size: 15.5px; }
  /* 页面直达链接：仅移动端抽屉内显示 */
  .main-nav .nav-page-link { display: block; color: var(--muted); }
  .main-nav a.nav-page-link[href="intro.html"] {
    margin-top: 8px; border-top: 1px solid var(--border); padding-top: 17px;
  }
  .nav-toggle { display: flex; }
  .nav-actions .btn { display: none; }
  .nav-actions .nav-dropdown { display: none; }
}

@media (max-width: 768px) {
  .news-item { flex-direction: column; gap: 10px; padding: 20px; }
  .news-item time { width: auto; padding-top: 0; }
  .qr-slot { width: 64px; height: 64px; }
  .section { padding: 68px 0; }
  .grid-3, .grid-4, .grid-2, .partner-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .concept-chips { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--border); }
  .arch-layer { grid-template-columns: 1fr; gap: 12px; padding: 22px; }
  .docs-panel { padding: 34px 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { justify-content: center; text-align: center; }
  .doc-panel { padding: 34px 24px; }
  .gpucloud-visual { height: 280px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}