/* ============================================================
   S 段 · 自旧 style.css 收编（v1.9.418）
   只留公网站渲染后真用到的规则（其余 80 个 class 属于已停用的 Flask 预览页）。
   本站只有这一个样式表：同一处外观写在两个文件里 = 谁生效看加载顺序，
   登录页那次故障（v1.9.416）就是这么来的，别再开第二个 css 文件。
   ============================================================ */
:root {--bg-primary: #0a0a0d;
  /* 导航条几何只有一个真相：内容高 64 + 下边框 1 = 接缝 65。
     正文让出的高度与 hero 的负 margin 都从这里算——v1.9.425 之前 76 与 65 是手抄的两个数，
     中间漏出 11px 裸 body 背景，被 hero 光晕一衬就成了「导航条下一条深色横杠」。 */
  --nav-h: 64px;
  --main-gap: 11px;
  --bg-secondary: #121215;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.45);
  --accent-primary: #2f6bff;
  --accent-secondary: #b48aff;
  --accent-gradient: linear-gradient(135deg, #2f6bff 0%, #b48aff 100%);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(47, 107, 255, 0.4);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-glow: 0 0 60px rgba(47, 107, 255, 0.3); }
* {margin: 0; padding: 0; box-sizing: border-box; }
html {scroll-behavior: smooth; }
body {font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden; }
a {color: inherit; text-decoration: none; }
ul {list-style: none; }
code {background: rgba(47, 107, 255, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13px;
  color: #60a5fa; }
.navbar {position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 10, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color); }
.nav-container {max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between; }
.nav-logo {display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700; }
.logo-icon {font-size: 24px; }
.logo-text {background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text; }
.nav-links {display: flex;
  gap: 8px; }
.nav-link {padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  transition: all .15s; }
.nav-link:hover {color: var(--text-primary); background: var(--bg-card); }
.nav-link.active {color: var(--text-primary); background: var(--bg-card-hover); }
.nav-actions {display: flex; align-items: center; gap: 10px; }
.btn {display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all .2s;
  white-space: nowrap; }
.btn-primary {background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(47, 107, 255, 0.4); }
.btn-primary:hover {transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(47, 107, 255, 0.5); }
.btn-outline {background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color); }
.btn-outline:hover {border-color: var(--accent-primary);
  background: rgba(47, 107, 255, 0.1); }
.btn-ghost {background: transparent;
  color: var(--text-secondary); }
.btn-ghost:hover {color: var(--text-primary); background: var(--bg-card); }
.btn-lg {padding: 14px 28px; font-size: 16px; border-radius: var(--radius-md); }
.btn-full {width: 100%; }
.hero {position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  /* 顶到导航条接缝（负 margin 吃掉 .page-main 让出的 --main-gap），再把它补回自己的
     padding——标题位置分毫不动，只是光晕不再从 76px 才开始 */
  margin-top: calc(-1 * var(--main-gap));
  padding: calc(120px + var(--main-gap)) 32px 80px;
  overflow: hidden; }
.hero-bg {position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none; }
.hero-glow {position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4; }
.glow-1 {width: 600px; height: 600px;
  background: #2f6bff;
  top: -200px; left: -100px;
  animation: float 8s ease-in-out infinite; }
.glow-2 {width: 500px; height: 500px;
  background: #b48aff;
  bottom: -150px; right: -100px;
  animation: float 10s ease-in-out infinite reverse; }
@keyframes float {0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); } }
.hero-grid {position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(47, 107, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 107, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%); }
.hero-content {position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px; }
.hero-badge {display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(47, 107, 255, 0.1);
  border: 1px solid rgba(47, 107, 255, 0.3);
  border-radius: 100px;
  font-size: 13px;
  color: #60a5fa;
  margin-bottom: 32px; }
.badge-dot {width: 8px; height: 8px;
  background: #34a853;
  border-radius: 50%;
  animation: pulse 2s infinite; }
@keyframes pulse {0%, 100% { opacity: 1; }
  50% { opacity: 0.4; } }
.hero-title {font-size: 64px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -2px; }
.gradient-text {background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text; }
.hero-subtitle {font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8; }
.hero-actions {display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px; }
.hero-stats {display: flex;
  justify-content: center;
  gap: 64px; }
.stat-item {text-align: center; }
.stat-number {font-size: 36px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text; }
.stat-label {font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px; }
.section-container {max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px; }
.section-header {text-align: center;
  margin-bottom: 56px; }
.section-title {font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -1px; }
.section-subtitle {font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto; }
.preview-section {padding: 100px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(47, 107, 255, 0.03) 50%, transparent 100%); }
.preview-mockup {max-width: 1100px;
  margin: 0 auto; }
.mockup-window {background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), var(--shadow-glow); }
.mockup-titlebar {display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-color); }
.mockup-dot {width: 12px; height: 12px;
  border-radius: 50%; }
.mockup-dot.red {background: #ff5f57; }
.mockup-dot.yellow {background: #febc2e; }
.mockup-dot.green {background: #28c840; }
.mockup-url {margin-left: 16px;
  font-size: 12px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 12px;
  border-radius: 6px; }
.mockup-body {display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 200px 200px;
  gap: 16px;
  padding: 24px; }
.mockup-chart {background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 12px; }
.chart-1 .chart-bar {width: 30px;
  background: var(--accent-gradient);
  border-radius: 4px 4px 0 0;
  opacity: 0.8; }
.chart-2 {align-items: center; }
.donut {width: 100px; height: 100px;
  border-radius: 50%;
  background: conic-gradient(#2f6bff 0% 35%, #b48aff 35% 60%, #ea4335 60% 80%, #34a853 80% 100%);
  position: relative; }
.donut::after {content: '';
  position: absolute;
  top: 20px; left: 20px; right: 20px; bottom: 20px;
  background: var(--bg-secondary);
  border-radius: 50%; }
.chart-3 {grid-column: span 2;
  align-items: stretch; }
.line-chart {width: 100%; height: 100%; }
.line-chart svg {width: 100%; height: 100%; }
.mockup-panel {grid-column: span 2;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px; }
.panel-title {font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #60a5fa; }
.panel-item {font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid var(--border-color); }
.panel-item:last-child {border-bottom: none; }
.features-section {padding: 100px 0; }
.features-grid {display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px; }
.feature-card {background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all .3s; }
.feature-card:hover {background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); }
.feature-icon {font-size: 40px;
  margin-bottom: 20px; }
.feature-card h3 {font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px; }
.feature-card p {font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7; }
.platforms-section {padding: 80px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(180, 138, 255, 0.02) 50%, transparent 100%); }
.cta-section {padding: 100px 0;
  text-align: center; }
.cta-content {max-width: 700px;
  margin: 0 auto;
  padding: 60px 40px;
  background: linear-gradient(135deg, rgba(47, 107, 255, 0.1) 0%, rgba(180, 138, 255, 0.05) 100%);
  border: 1px solid rgba(47, 107, 255, 0.2);
  border-radius: var(--radius-lg); }
.cta-title {font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px; }
.cta-subtitle {font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 32px; }
.cta-actions {display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center; }
.footer {border-top: 1px solid var(--border-color);
  padding: 60px 0 24px;
  background: var(--bg-secondary); }
.footer-container {max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px; }
.footer-logo {font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px; }
.footer-desc {font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7; }
.footer-col h4 {font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary); }
.footer-col a, .footer-col span {display: block;
  font-size: 13px;
  color: var(--text-muted);
  padding: 4px 0;
  transition: color .15s; }
.footer-col a:hover {color: var(--text-primary); }
.footer-bottom {max-width: 1280px;
  margin: 0 auto;
  padding: 24px 32px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted); }
.page-header {padding: 140px 32px 80px;
  text-align: center;
  background: linear-gradient(180deg, rgba(47, 107, 255, 0.08) 0%, transparent 100%); }
.page-title {font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -1px; }
.page-subtitle {font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto; }
.model-grid {display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px; }
.download-notice {padding: 16px;
  background: rgba(249,171,0, 0.08);
  border: 1px solid rgba(249,171,0, 0.2);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: #f9ab00;
  text-align: left;
  line-height: 1.6; }
.compare-section {margin-bottom: 80px; }
.compare-grid {display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto; }
.compare-col {background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px; }
.compare-col-header {display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color); }
.compare-col-header h4 {font-size: 18px; font-weight: 600; }
.compare-list {display: flex; flex-direction: column; gap: 12px; }
.compare-list li {font-size: 14px;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative; }
.steps-grid {display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px; }
.step-card {background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: all .3s; }
.step-card:hover {border-color: var(--border-hover);
  transform: translateY(-4px); }
.step-number {width: 48px; height: 48px;
  margin: 0 auto 16px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff; }
.step-card h4 {font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px; }
.step-card p {font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6; }
.nav-link.active {color: var(--text-primary);
  background: transparent;
  position: relative; }
.nav-link.active::after {content: "";
  position: absolute;
  left: 50%;
  bottom: -22px;
  transform: translateX(-50%);
  width: 48px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px; }
.footer {border-top: 1px solid var(--accent-primary); }
.hero-badge {position: relative;
  padding-left: 56px; }
.hero-badge::before {content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px; }
body > main > section:nth-of-type(even):not(.hero):not(.cta-section):not(.footer) {background: var(--bg-secondary); }
@media (max-width: 1024px) {.features-grid {grid-template-columns: repeat(2, 1fr); }
.hero-title {font-size: 48px; }
.hero-stats {gap: 40px; }
.footer-container {grid-template-columns: 1fr 1fr; }
.steps-grid {grid-template-columns: repeat(2, 1fr); }
.mockup-body {grid-template-columns: 1fr;
  grid-template-rows: 200px 200px 160px; }
.chart-3 {grid-column: span 1; }
.mockup-panel {grid-column: span 1; } }
@media (max-width: 768px) {.nav-links {display: none; }
.hero-title {font-size: 36px; }
.hero-subtitle {font-size: 16px; }
.hero-actions {flex-direction: column; align-items: center; }
.hero-stats {flex-wrap: wrap; gap: 24px; }
.features-grid {grid-template-columns: 1fr; }
.section-title {font-size: 28px; }
.page-title {font-size: 32px; }
.footer-container {grid-template-columns: 1fr; }
.compare-grid {grid-template-columns: 1fr; }
.steps-grid {grid-template-columns: 1fr; }
.model-grid {grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) {.mockup-body {padding: 16px; gap: 12px; }
.mockup-chart {gap: 8px; padding: 12px; }
.chart-1 .chart-bar {width: 20px; }
.cta-actions .btn {white-space: normal; } }
.skills-grid {display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px; }
.skill-card {display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all .3s; }
.skill-card::before {content: "";
  position: absolute;
  left: 0; top: 0;
  width: 3px; height: 0;
  background: var(--accent-gradient);
  transition: height .3s; }
.skill-card:hover {background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, .3); }
.skill-card:hover::before {height: 100%; }
.skill-card[hidden] {display: none; }
.skill-card-head {display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px; }
.skill-card-title {margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden; }
.skill-ver {flex: 0 0 auto;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 100px;
  font-family: ui-monospace, Consolas, monospace;
  background: rgba(180, 138, 255, .12);
  border: 1px solid rgba(180, 138, 255, .3);
  color: #d9c6ff; }
.skill-card-desc {flex: 1;
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden; }
.skill-card-foot {display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  font-size: 12px; }
.skill-cat {padding: 3px 10px;
  border-radius: 100px;
  background: rgba(47, 107, 255, .1);
  border: 1px solid rgba(47, 107, 255, .25);
  color: #a8c2ff; }
@media (max-width: 1024px) {.skills-grid {grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) {.skills-grid {grid-template-columns: 1fr; } }
.skills-section {padding: 100px 0; }
.skills-more {margin-top: 48px; text-align: center; }
.skills-section {scroll-margin-top: 88px; }

/* ============================================================
   官网 B 档样式层（v1.9.414）
   ------------------------------------------------------------
   来历：这套规则原本以 <style id="b-tier-v2"> 内联在 .local/site/home.html 与
   login.html 里，于是「本地预览 ≠ 线上外观」，而且每加一个页面就要再抄一遍。
   现在收进本文件，所有官网页面共用；令牌名沿用 DESIGN_SYSTEM.md §2 的 L0/L1 规范名，
   不另起别名（§5.1：没在对账表出现的第四种别名 = 漂移）。

   内容分区：① L0/L1 令牌 ② B 档覆盖（Nav/Hero/Footer）③ 内页通用
   ④ 平台能力矩阵 ⑤ 技能与模型 ⑥ 截图槽 ⑦ FAQ ⑧ 表单 ⑨ 法务长文
   ⑩ 无障碍与响应式补丁 ⑪ 登录页
   ============================================================ */

/* ① L0 黑族 / L1 蓝族（DESIGN_SYSTEM §2.1 §2.2） */
:root {
  --bg-darkest: #050507;
  --bg-base: #0a0a0d;
  --bg-elevated: #121215;
  --bg-elevated-2: #18181c;
  --blue-primary: #2f6bff;
  --blue-deep: #1f4fd0;
  --blue-tint: rgba(47, 107, 255, .10);
  --blue-edge: rgba(47, 107, 255, .30);
}

/* ② B 档覆盖：毛玻璃 Nav + 当前项短蓝线 + Hero 径向光 + Footer 蓝描边 */
.navbar { background: rgba(10, 10, 13, .7); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.nav-link { position: relative; }
.nav-link.active::after {
  content: ""; position: absolute; left: 50%; bottom: -10px; transform: translateX(-50%);
  width: 48px; height: 2px; background: var(--blue-primary); border-radius: 1px;
}
.hero-bg { background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(31, 79, 208, .45), transparent 70%); }
.hero-glow.glow-1 { background: radial-gradient(circle, rgba(31, 79, 208, .35), transparent 65%); }
.hero-glow.glow-2 { background: radial-gradient(circle, rgba(180, 138, 255, .16), transparent 65%); }
.hero-badge { border: 1px solid var(--blue-edge); background: var(--blue-tint); }
.gradient-text {
  background: linear-gradient(135deg, #2f6bff 0%, #b48aff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.feature-card, .platform-tag { border-radius: 12px; }
.footer { background: var(--bg-darkest); border-top: 1px solid var(--blue-primary); }
.logo-icon { width: 22px; height: 22px; border-radius: 6px; display: inline-block; vertical-align: -5px; }
.footer-logo .logo-icon { width: 20px; height: 20px; vertical-align: -4px; margin-right: 6px; }

/* ③ 内页通用：页头、提示条、按钮行、指标块 */
.page-main { padding-top: calc(var(--nav-h) + 1px + var(--main-gap)); }
.page-section { padding: 72px 0; }
.page-section > .section-container { max-width: 1080px; }
.models-section, .faq-section, .steps-section { padding: 72px 0; }
.hero-title .gradient-text { display: block; }
.hero-note { margin: 26px auto 0; max-width: 620px; font-size: 13px; color: var(--text-muted); }
.chart-bar.b-45 { height: 45%; }
.chart-bar.b-55 { height: 55%; }
.chart-bar.b-60 { height: 60%; }
.chart-bar.b-70 { height: 70%; }
.chart-bar.b-80 { height: 80%; }
.chart-bar.b-90 { height: 90%; }
.notice {
  border: 1px solid var(--blue-edge); background: var(--blue-tint); color: var(--text-secondary);
  border-radius: var(--radius-md); padding: 16px 20px; margin: 0 0 32px; font-size: 15px;
}
.notice--warn { border-color: rgba(255, 186, 107, .35); background: rgba(255, 186, 107, .08); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 40px 0 8px; }
.kpi {
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md);
  padding: 22px 18px; text-align: center;
}
.kpi-num { font-size: 30px; font-weight: 800; color: var(--text-primary); }
.kpi-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.spec-list { margin: 0; display: grid; gap: 10px; }
.spec-list li { color: var(--text-secondary); font-size: 15px; padding-left: 20px; position: relative; }
.spec-list li::before { content: ""; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--blue-primary); }
.ver-line { color: var(--text-muted); font-size: 14px; }
.ext-key { color: var(--text-muted); font-size: 13px; letter-spacing: .04em; }
.ext-hash { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; word-break: break-all; text-align: right; max-width: 62%; }

/* ④ 平台能力矩阵：窄屏横向滚动，不做「手机上砍列」的把戏 */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--border-color); border-radius: var(--radius-md); }
.matrix { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 15px; }
.matrix caption { text-align: left; color: var(--text-muted); font-size: 14px; padding: 0 0 12px; }
.matrix th, .matrix td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--border-color); vertical-align: top; }
.matrix thead th { color: var(--text-muted); font-weight: 600; font-size: 13px; letter-spacing: .04em; background: var(--bg-elevated); }
.matrix tbody tr:last-child td { border-bottom: none; }
.matrix tbody tr:hover td { background: var(--bg-card-hover); }
.matrix .m-name { font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.matrix .m-sites { color: var(--text-muted); font-size: 13px; }
.chip {
  display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px;
  border: 1px solid var(--border-color); color: var(--text-secondary); white-space: nowrap;
}
.chip--hard { border-color: var(--blue-edge); background: var(--blue-tint); color: #cfe0ff; }
.chip--best { border-color: rgba(255, 186, 107, .35); background: rgba(255, 186, 107, .08); color: #ffd9a8; }

/* ⑤ 模型与技能：模型卡复用 .feature-card 外观，只加一条口径脚注 */
.model-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.model-card {
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md);
  padding: 22px; transition: border-color .2s, transform .2s;
}
.model-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.model-kind { font-size: 12px; color: var(--blue-primary); letter-spacing: .06em; }
.model-name { font-size: 17px; font-weight: 700; margin: 6px 0 8px; }
.model-use { font-size: 14px; color: var(--text-secondary); }
.footnote { color: var(--text-muted); font-size: 13px; margin-top: 24px; text-align: center; }

/* ⑥ 真实界面截图槽：有图才出现，没图整段不渲染（不放占位图糊弄人） */
.shots-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 8px; }
.shot { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; }
.shot img { display: block; width: 100%; height: auto; }
.shot figcaption { padding: 14px 18px; font-size: 14px; color: var(--text-secondary); }

/* ⑦ FAQ：details 折叠，零 JS 所以 CSP 不需要 unsafe-inline */
.faq-list { display: grid; gap: 14px; max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0 22px; }
.faq-item[open] { border-color: var(--blue-edge); }
.faq-q { cursor: pointer; padding: 18px 0; font-size: 17px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq-q::-webkit-details-marker { display: none; }
.faq-q::after { content: "+"; color: var(--blue-primary); font-weight: 400; }
.faq-item[open] .faq-q::after { content: "-"; }
.faq-a { padding: 0 0 20px; color: var(--text-secondary); font-size: 15px; }
.faq-a p + p { margin-top: 10px; }

/* ⑧ 申请开通表单 */
.apply-card { max-width: 640px; margin: 0 auto; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 36px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14px; color: var(--text-secondary); margin-bottom: 8px; }
.field-hint { font-size: 13px; color: var(--text-muted); margin-top: 6px; }
.field input, .field select, .field textarea {
  width: 100%; background: var(--bg-elevated); border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); color: var(--text-primary); padding: 12px 14px;
  font-size: 15px; font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue-primary); }
.field textarea { min-height: 108px; resize: vertical; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.consent { font-size: 13px; color: var(--text-muted); display: flex; gap: 10px; align-items: flex-start; }
.consent input { width: auto; margin-top: 3px; }

/* ⑨ 法务与文档长文 */
.prose { max-width: 820px; margin: 0 auto; color: var(--text-secondary); }
.prose h2 { color: var(--text-primary); font-size: 24px; margin: 40px 0 14px; }
.prose h3 { color: var(--text-primary); font-size: 18px; margin: 28px 0 10px; }
.prose p, .prose li { font-size: 15px; line-height: 1.85; }
.prose ul { list-style: disc; padding-left: 22px; margin: 10px 0; }
.prose ol { list-style: decimal; padding-left: 22px; margin: 10px 0; }
.prose code { font-size: 14px; }
.prose .meta { color: var(--text-muted); font-size: 14px; }
.ver-block { border-left: 2px solid var(--blue-primary); padding-left: 22px; margin-bottom: 34px; }
.ver-block h3 { margin-top: 0; }

/* ⑩ 无障碍与响应式补丁 */
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--blue-deep); color: #fff; padding: 10px 16px; border-radius: 0 0 var(--radius-sm) 0; z-index: 2000; }
.skip-link:focus { left: 0; }
:focus-visible { outline: 2px solid var(--blue-primary); outline-offset: 2px; }
.nav-toggle { display: none; }
.nav-toggle > summary { list-style: none; cursor: pointer; color: var(--text-secondary); font-size: 14px; padding: 8px 14px; border: 1px solid var(--border-color); border-radius: var(--radius-sm); }
.nav-toggle > summary::-webkit-details-marker { display: none; }
.nav-drop { position: absolute; right: 24px; top: 64px; background: var(--bg-elevated); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 10px; display: grid; gap: 2px; min-width: 168px; }
.nav-drop a { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 14px; color: var(--text-secondary); }
.nav-drop a:hover, .nav-drop a.active { background: var(--blue-tint); color: var(--text-primary); }
.footer-legal { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: center; margin-top: 12px; }
.footer-legal a { font-size: 13px; color: var(--text-muted); text-decoration: underline; text-underline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .feature-card, .model-card { transition: none; }
}
@media (max-width: 1024px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .model-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
}
@media (max-width: 768px) {
  /* 矮屏导航条更矮，让位只留 3px：改这一个数，.page-main 与 .hero 跟着走（原来这里手抄 68px） */
  :root { --main-gap: 3px; }
  .page-section { padding: 48px 0; }
  .apply-card { padding: 24px; }
  .shots-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .nav-actions .btn-ghost { display: none; }
}

/* ============================================================
   ⑪ 登录页（app 子域唯一的一张卡）
   ------------------------------------------------------------
   从 style.css 的「登录页」段整体搬来——登录页的外观从此只有一处实现，
   与本页共用 site.css 的令牌，不再靠两个文件谁后加载压住谁。搬的同时修掉三个真实故障：
   ① 旧 `.login-body` 带 `overflow:hidden`：卡片比视口高（手机横屏、系统大字号、
      报错条出现）时顶部被裁掉且滚不回来。现在居中改用容器 `margin:auto`——
      flex 项溢出空间为负时 auto 边距按 0 算，卡片退回顶对齐，整页可滚。
   ② 标识原来只有 `<img class="logo-icon">`，尺寸全靠图片固有宽高：要么被
      site.css 的 22px 导航规格压成「登录页挂着导航大小的 logo」，要么在原样
      直出的旧版里撑爆卡片。这里给登录页自己的规格。
   ③ 品牌文字是 flex 子项，图一大就被挤成一字一行（线上截图里那个竖排「跨境
      电商工作台」就是这么来的）。`flex:none` + `white-space:nowrap` 钉死。
   选择器都比 `.logo-icon` / `.logo-text` 更特殊，与加载顺序无关。
   ============================================================ */
.login-body {
  min-height: 100vh;
  min-height: 100dvh;   /* 手机地址栏收起时的 100vh 会多出一截，dvh 才是真视口 */
  display: flex;
  position: relative;
}
.login-bg { position: absolute; top: 0; left: 0; right: 0; bottom: 0; overflow: hidden; pointer-events: none; }
.login-glow { position: absolute; border-radius: 50%; filter: blur(120px); opacity: .3; }
.login-glow.glow-1 { width: 500px; height: 500px; background: var(--blue-primary); top: -150px; right: -100px; }
.login-glow.glow-2 { width: 400px; height: 400px; background: var(--accent-secondary); bottom: -100px; left: -100px; }
.login-grid {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(47, 107, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 107, 255, .04) 1px, transparent 1px);
  background-size: 50px 50px;
}
.login-container { position: relative; z-index: 1; width: 100%; max-width: 440px; margin: auto; padding: 32px 24px; }
.login-card {
  background: rgba(18, 18, 21, .9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
}
.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 28px;
}
.login-logo .logo-icon { width: 44px; height: 44px; border-radius: 10px; flex: 0 0 auto; }
.login-logo .logo-text { white-space: nowrap; }
.login-title { font-size: 28px; font-weight: 700; text-align: center; margin-bottom: 8px; }
.login-subtitle { font-size: 14px; color: var(--text-secondary); text-align: center; margin-bottom: 28px; }
.login-error {
  padding: 12px 16px;
  background: rgba(234, 67, 53, .1);
  border: 1px solid rgba(234, 67, 53, .3);
  border-radius: var(--radius-sm);
  color: #ea4335;
  font-size: 14px;
  font-weight: 500;
  margin: -16px 0 20px;   /* 报错条紧贴副标题往下 12px、离表单 20px：不用 :has 也能有节奏 */
  text-align: center;
}
.login-form { display: flex; flex-direction: column; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--text-secondary); }
.form-group input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;      /* 不写这行，输入框退回系统默认字体（§五 的同类坑） */
  font-size: 15px;
  transition: border-color .15s, background .15s, box-shadow .15s;
  outline: none;
}
.form-group input::placeholder { color: var(--text-muted); }
.form-group input:focus {
  border-color: var(--blue-primary);
  background: var(--blue-tint);
  box-shadow: 0 0 0 3px var(--blue-tint);
}
.login-form .btn-full { padding: 12px 20px; font-size: 15px; }   /* 44px 级触摸目标 */
.login-footer {
  margin-top: 24px;
  display: grid;
  gap: 10px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}
.login-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; }
.login-links a { color: var(--text-secondary); text-decoration: underline; text-underline-offset: 3px; }
.login-links a:hover { color: var(--blue-primary); }
.login-back { margin-top: 18px; text-align: center; }
.login-back a { font-size: 13px; color: var(--text-muted); transition: color .15s; }
.login-back a:hover { color: var(--blue-primary); }
@media (max-width: 768px) {
  .login-container { padding: 20px 16px; }
  .login-card { padding: 26px 20px; }
  .login-logo .logo-icon { width: 36px; height: 36px; }
  .login-title { font-size: 24px; }
  .form-group input { font-size: 16px; }   /* iOS Safari <16px 会强制放大整页 */
}
@media (prefers-reduced-motion: reduce) {
  .form-group input, .login-back a { transition: none; }
}