/* ============================================================
   AIOps · 营销宣传网站样式 v2
   设计语言：现代科技 · 大气专业 · 品牌克制
   对标一线互联网公司官网标准
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg: #070b14; --bg2: #0b1124; --bg3: #0f1832;
  --surface: #0d142a; --surface2: #111b36; --surface3: #162348;
  --surface-glass: rgba(13, 20, 42, 0.72);
  --line: #1a2652; --line2: #243164;
  --txt: #f0f4ff; --txt2: #b6c4e8; --muted: #6e80b0; --muted2: #4a5a8a;

  /* 品牌色系 — 蓝紫渐变主调 */
  --accent: #4f6ef6; --accent2: #5eead4; --accent-soft: rgba(79, 110, 246, .12);
  --accent-glow: rgba(79, 110, 246, .28);
  --ok: #34d399; --ok-soft: rgba(52, 211, 153, .12);
  --warn: #fbbf24; --warn-soft: rgba(251, 191, 36, .10);
  --crit: #fb7185; --crit-soft: rgba(251, 113, 133, .10);
  --purple: #a78bfa; --purple-soft: rgba(167, 139, 250, .12);

  --r-sm: 10px; --r: 14px; --r-lg: 20px; --r-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .18);
  --shadow: 0 4px 20px rgba(0, 0, 0, .32);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, .48);
  --shadow-glow: 0 0 30px rgba(79, 110, 246, .16);

  --gradient: linear-gradient(135deg, #4f6ef6 0%, #7c3aed 50%, #5eead4 100%);
  --gradient-brand: linear-gradient(135deg, var(--accent), var(--purple), var(--accent2));
  --gradient-soft: linear-gradient(135deg, rgba(79, 110, 246, .08), rgba(94, 234, 212, .04));
  --transition: 280ms cubic-bezier(.32, .72, 0, 1);
  --transition-fast: 160ms cubic-bezier(.32, .72, 0, 1);
  --max-w: 1200px;

  --nav-bg: rgba(7, 11, 20, .76); --nav-scrolled-bg: rgba(7, 11, 20, .94);
  --code-bg: #090d18; --code-bar: #0f1525; --code-border: #1a2652;
  --code-fg: #c9d6f0; --code-muted: #5e6e96; --code-ok: #34d399; --code-accent: #5eead4;

  --ok-border: rgba(52, 211, 153, .28); --accent-border: rgba(79, 110, 246, .28);
  --warn-border: rgba(251, 191, 36, .22); --purple-border: rgba(167, 139, 250, .28);
  color-scheme: dark;
}

/* ---------- 浅色主题 ---------- */
:root[data-theme="light"] {
  --bg: #f5f7fc; --bg2: #eef2fa; --bg3: #e4eaf7;
  --surface: #ffffff; --surface2: #f6f9fe; --surface3: #edf2fb;
  --surface-glass: rgba(255, 255, 255, .78);
  --line: #e4eaf4; --line2: #d0d8ec;
  --txt: #0a1226; --txt2: #3a4870; --muted: #5c6b98; --muted2: #8593b4;
  --accent: #4565f0; --accent2: #0d9488; --accent-soft: rgba(69, 101, 240, .08);
  --accent-glow: rgba(69, 101, 240, .14);
  --ok: #059669; --ok-soft: rgba(5, 150, 105, .08);
  --warn: #d97706; --warn-soft: rgba(217, 119, 6, .08);
  --crit: #e11d48; --crit-soft: rgba(225, 29, 72, .08);
  --purple: #7c3aed; --purple-soft: rgba(124, 58, 237, .08);
  --shadow-sm: 0 1px 3px rgba(10, 18, 38, .04);
  --shadow: 0 4px 16px rgba(10, 18, 38, .06);
  --shadow-lg: 0 12px 40px rgba(10, 18, 38, .10);
  --shadow-glow: 0 0 24px rgba(69, 101, 240, .10);
  --gradient: linear-gradient(135deg, #4565f0 0%, #7c3aed 50%, #0d9488 100%);
  --gradient-brand: linear-gradient(135deg, var(--accent), var(--purple), var(--accent2));
  --gradient-soft: linear-gradient(135deg, rgba(69, 101, 240, .06), rgba(13, 148, 136, .03));
  --nav-bg: rgba(255, 255, 255, .76); --nav-scrolled-bg: rgba(255, 255, 255, .94);
  --code-bg: #f0f4fe; --code-bar: #e6ecf8; --code-border: #d8e0f2;
  --code-fg: #1e293b; --code-muted: #64748b; --code-ok: #059669; --code-accent: #0891b2;
  --ok-border: rgba(5, 150, 105, .20); --accent-border: rgba(69, 101, 240, .20);
  --warn-border: rgba(217, 119, 6, .18); --purple-border: rgba(124, 58, 237, .20);
  color-scheme: light;
}

/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg); color: var(--txt);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 15px; line-height: 1.72; overflow-x: hidden;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== 语言切换 ===== */
.lang-toggle {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--surface2); border: 1px solid var(--line2);
  border-radius: 999px; padding: 7px 14px; font-size: 13px;
  color: var(--txt2); cursor: pointer; font-weight: 500; font-family: inherit;
  transition: all var(--transition-fast);
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent2); background: var(--surface3); }
.lang-toggle svg { width: 14px; height: 14px; }
.lang-toggle option { background: var(--surface2); color: var(--txt); }

/* ===== 导航栏 — 毛玻璃升级 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.navbar.scrolled {
  background: var(--nav-scrolled-bg);
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(255,255,255,.04), 0 4px 20px rgba(0,0,0,.10);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 32px;
}
.nav-logo {
  display: flex; align-items: center; gap: 11px;
  font-weight: 700; font-size: 18px; letter-spacing: -.3px;
}
.nav-logo .logo-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800; color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
  transition: transform var(--transition-fast);
}
.nav-logo:hover .logo-icon { transform: scale(1.06); }

.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links > a {
  color: var(--txt2); font-size: 14px; font-weight: 500;
  transition: color var(--transition-fast); position: relative; letter-spacing: .1px;
}
.nav-links > a:hover, .nav-links > a.active { color: var(--txt); }
.nav-links > a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -22px;
  height: 2px; background: var(--gradient); border-radius: 2px;
}

/* 导航下拉 */
.nav-dropdown { position: relative; display: flex; align-items: center; }
.nav-dropdown-toggle {
  display: flex; align-items: center; gap: 6px; background: none; border: none;
  color: var(--txt2); font-size: 14px; font-weight: 500; cursor: pointer;
  font-family: inherit; padding: 0; transition: color var(--transition-fast);
}
.nav-dropdown-toggle:hover, .nav-dropdown-toggle[aria-expanded="true"] { color: var(--txt); }
.nav-dropdown .caret { font-size: 10px; line-height: 1; transition: transform var(--transition-fast); opacity: .6; }
.nav-dropdown.open .caret { transform: rotate(180deg); opacity: 1; }

.nav-dropdown-menu {
  position: absolute; top: calc(100% + 18px); left: 50%; transform: translateX(-50%);
  min-width: 190px; background: var(--surface-glass); backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--line); border-radius: var(--r);
  box-shadow: var(--shadow-lg); padding: 6px;
  display: none; flex-direction: column; gap: 2px; z-index: 60;
}
.nav-dropdown.open .nav-dropdown-menu { display: flex; }
.nav-dropdown-menu a {
  color: var(--txt2); font-size: 14px; font-weight: 500;
  padding: 10px 14px; border-radius: 8px; white-space: nowrap;
  transition: all var(--transition-fast);
}
.nav-dropdown-menu a:hover { background: var(--surface3); color: var(--txt); }
.nav-dropdown-menu a.active { color: var(--accent2); background: var(--accent-soft); }

@media (min-width: 901px) { .nav-dropdown:hover .nav-dropdown-menu { display: flex; } }
@media (max-width: 900px) {
  .nav-dropdown { width: 100%; }
  .nav-dropdown-toggle { justify-content: flex-start; width: 100%; padding: 8px 0; }
  .nav-dropdown-menu {
    position: static; transform: none; left: auto; min-width: 0;
    background: transparent; border: none; box-shadow: none;
    padding: 0 0 0 16px; display: none; backdrop-filter: none; -webkit-backdrop-filter: none;
  }
  .nav-dropdown.open .nav-dropdown-menu { display: flex; }
}

/* 导航 CTA 按钮 */
.nav-cta {
  background: var(--gradient); color: #fff;
  padding: 10px 22px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 18px var(--accent-glow);
  letter-spacing: .1px;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(79, 110, 246, .40);
}
.nav-cta:active { transform: translateY(0) scale(.97); }

.nav-toggle {
  display: none; background: none; border: none;
  color: var(--txt); cursor: pointer; font-size: 24px; line-height: 1;
}

/* ===== 通用按钮 ===== */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  background: var(--gradient); color: #fff;
  padding: 15px 32px; border-radius: 999px;
  font-size: 15px; font-weight: 600; border: none; cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 6px 24px var(--accent-glow);
  letter-spacing: .2px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(79, 110, 246, .42);
}
.btn-primary:active { transform: translateY(0) scale(.98); }

.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  background: var(--surface2); color: var(--txt);
  padding: 15px 32px; border-radius: 999px;
  font-size: 15px; font-weight: 600;
  border: 1px solid var(--line2); cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--surface3);
  color: var(--txt);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:active { transform: translateY(0) scale(.98); background: var(--surface3); }

/* ========== Hero — 顶级互联网公司风格 ========== */
.hero {
  min-height: 90vh; display: flex; align-items: center; position: relative;
  padding: 140px 32px 80px; overflow: hidden;
}

/* 背景动效层 */
.hero-bg {
  position: absolute; inset: -20%; z-index: 0; pointer-events: none;
}
.hero-bg::before {
  content: ""; position: absolute;
  top: 5%; left: 8%; width: 520px; height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,110,246,.22) 0%, transparent 70%);
  animation: hero-float-a 16s ease-in-out infinite;
}
.hero-bg::after {
  content: ""; position: absolute;
  bottom: 10%; right: 5%; width: 460px; height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(94,234,212,.18) 0%, transparent 70%);
  animation: hero-float-b 14s ease-in-out infinite;
}

@keyframes hero-float-a {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(60px, -40px) scale(1.08); }
  50% { transform: translate(-20px, 30px) scale(.94); }
  75% { transform: translate(-50px, -20px) scale(1.04); }
}

@keyframes hero-float-b {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(-50px, 30px) scale(1.06); }
  50% { transform: translate(30px, -40px) scale(.92); }
  75% { transform: translate(40px, 20px) scale(1.05); }
}

/* 网格层 */
.hero-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 18%, transparent 66%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 18%, transparent 66%);
}

/* 中心光晕 */
.hero::after {
  content: ""; position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 800px; height: 600px;
  background: radial-gradient(ellipse at center, rgba(79,110,246,.06) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

.hero-inner {
  max-width: 980px; margin: 0 auto; position: relative; z-index: 2;
  width: 100%; text-align: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 7px 20px; border-radius: 999px;
  font-size: 13.5px; color: var(--accent2);
  margin-bottom: 32px; font-weight: 600;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  letter-spacing: .2px;
}
.hero-badge svg { width: 15px; height: 15px; }

.hero h1 {
  font-size: clamp(34px, 5.5vw, 58px); font-weight: 800;
  line-height: 1.10; letter-spacing: -1.6px;
  margin-bottom: 24px;
}
.hero h1 .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-positioning {
  font-size: 16px; color: var(--accent2);
  font-weight: 600; letter-spacing: .2px; margin-bottom: 20px;
}

.hero > .hero-inner > p,
.hero .hero-inner > p {
  font-size: 18px; color: var(--txt2);
  max-width: 680px; margin: 0 auto 40px; line-height: 1.78;
}

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

.hero-links {
  display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
  justify-content: center; margin-top: 24px;
  font-size: 13.5px; color: var(--muted);
}
.hero-links a {
  color: var(--txt2); transition: color var(--transition-fast);
  padding: 4px 2px;
}
.hero-links a:hover { color: var(--accent2); }
.hero-links-sep { color: var(--muted2); }

.hero-proof {
  display: flex; gap: 26px; flex-wrap: wrap; justify-content: center;
  margin-top: 38px; font-size: 13.5px; color: var(--txt2);
}
.hero-proof span {
  display: inline-flex; align-items: center; gap: 7px;
}
.hero-proof span::before {
  content: ""; width: 18px; height: 18px;
  background: var(--ok-soft); border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 800; color: var(--ok);
  content: "✓";
}

.hero-stats {
  display: flex; gap: 64px; margin: 52px auto 0;
  flex-wrap: wrap; justify-content: center;
  padding-top: 36px; border-top: 1px solid var(--line);
}
.hero-stat .stat-num {
  display: flex; align-items: baseline; justify-content: center; line-height: 1;
}
.hero-stat .num {
  font-size: 42px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.hero-stat .unit {
  font-size: 18px; font-weight: 700; color: var(--muted);
  margin-left: 4px; letter-spacing: 0;
}
.hero-stat .label {
  font-size: 13px; color: var(--muted); margin-top: 10px;
  font-weight: 500; letter-spacing: .1px;
}

/* ===== 通用 Section ===== */
.section {
  padding: 108px 32px; position: relative; scroll-margin-top: 88px;
}
.section--alt {
  background: var(--bg2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
section[id] { scroll-margin-top: 88px; }
.section-inner { max-width: var(--max-w); margin: 0 auto; }

.section-head {
  text-align: center; margin-bottom: 60px;
  max-width: 720px; margin-left: auto; margin-right: auto;
}
.section-tag {
  display: inline-block; font-size: 13px; color: var(--accent2);
  font-weight: 700; letter-spacing: 1.8px; text-transform: uppercase;
  margin-bottom: 16px;
  background: var(--accent-soft);
  padding: 4px 14px; border-radius: 999px;
}
.section h1,
.section h2 {
  font-size: clamp(28px, 3.6vw, 40px); font-weight: 760;
  letter-spacing: -.7px; line-height: 1.18; margin-bottom: 16px;
}
.section-head h1 { margin: 0 0 16px; }
.section-desc {
  color: var(--muted); font-size: 16px; max-width: 600px;
  margin: 0 auto; line-height: 1.72;
}

/* ===== 痛点卡片 ===== */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 22px;
}
.pain-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 36px 30px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.pain-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--crit), var(--warn));
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.pain-card:hover {
  border-color: var(--line2);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.pain-card:hover::before { transform: scaleX(1); }

.pain-icon {
  width: 50px; height: 50px; border-radius: 14px;
  background: var(--crit-soft);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  border: 1px solid rgba(251, 113, 133, .18);
}
.pain-icon svg { width: 24px; height: 24px; color: var(--crit); }

.pain-card h3 {
  font-size: 19px; font-weight: 660; margin-bottom: 12px; letter-spacing: -.2px;
}
.pain-card > p {
  color: var(--muted); font-size: 14.5px; line-height: 1.68;
}

.pain-solution {
  margin-top: 18px; padding: 14px 16px;
  background: var(--ok-soft); border-radius: var(--r-sm);
  border: 1px solid var(--ok-border);
  font-size: 13.5px; color: var(--ok);
  display: flex; align-items: flex-start; gap: 10px; line-height: 1.58;
  font-weight: 500;
}
.pain-solution svg { width: 16px; height: 16px; flex: none; margin-top: 2px; }

/* ===== 功能卡片 — 毛玻璃 + 渐变边框 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 22px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 36px 30px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.feature-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent-soft);
}
.feature-card .glow { display: none; }

.feature-icon {
  width: 54px; height: 54px; border-radius: 14px;
  background: var(--gradient-soft);
  border: 1px solid var(--accent-border);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px; position: relative; z-index: 1;
}
.feature-icon svg { width: 26px; height: 26px; color: var(--accent2); }

.feature-card h3 {
  font-size: 20px; font-weight: 660; margin-bottom: 12px;
  position: relative; z-index: 1; letter-spacing: -.3px;
}
.feature-card .desc {
  color: var(--muted); font-size: 14.5px; line-height: 1.72;
  margin-bottom: 18px; position: relative; z-index: 1;
}
.feature-card .value {
  display: flex; align-items: center; gap: 10px;
  font-size: 13.5px; color: var(--accent2); font-weight: 600;
  padding-top: 18px; border-top: 1px solid var(--line);
  position: relative; z-index: 1;
}
.feature-card .value svg { width: 18px; height: 18px; flex: none; }

/* ===== 高亮功能卡片 ===== */
.feature-card.hl {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 1px var(--accent-soft), var(--shadow-lg);
}

/* ===== 解决方案场景 ===== */
.scenario-list { display: flex; flex-direction: column; gap: 26px; }
.scenario {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 44px; display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  align-items: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.scenario:hover { border-color: var(--line2); box-shadow: var(--shadow); }
.scenario-num {
  font-size: 14px; font-weight: 700; color: var(--accent);
  letter-spacing: 1.2px; margin-bottom: 10px;
}
.scenario h3 { font-size: 24px; font-weight: 680; margin-bottom: 14px; letter-spacing: -.4px; }
.scenario p { color: var(--muted); font-size: 15px; margin-bottom: 20px; line-height: 1.72; }
.scenario-list ul { list-style: none; padding: 0; }
.scenario-list li {
  padding: 8px 0 8px 26px; position: relative;
  color: var(--txt2); font-size: 14.5px; line-height: 1.62;
}
.scenario-list li::before {
  content: ""; position: absolute; left: 0; top: 15px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent-glow);
}

.scenario-visual {
  background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--r-lg);
  min-height: 260px; display: flex; align-items: center;
  justify-content: center; position: relative; overflow: hidden;
}
.scenario-visual .mockup {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12.5px; color: var(--code-ok); text-align: left;
  background: var(--code-bar); border: 1px solid var(--code-border);
  border-radius: var(--r-sm);
  padding: 18px 22px; width: 90%; line-height: 1.85;
  word-break: break-word; overflow-wrap: anywhere; white-space: normal;
}

.scenario-result {
  display: flex; align-items: center; gap: 10px; margin-top: 20px;
  padding: 12px 16px;
  background: var(--accent-soft); border: 1px solid var(--accent-border);
  border-radius: var(--r-sm);
  color: var(--accent2); font-size: 14px; font-weight: 600; line-height: 1.48;
}
.scenario-result svg { width: 18px; height: 18px; flex: none; }

/* ===== 对比表格 ===== */
.compare-table-wrap {
  overflow-x: auto; border-radius: var(--r-lg);
  border: 1px solid var(--line); background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.compare-table {
  width: 100%; border-collapse: collapse; min-width: 740px;
}
.compare-table th, .compare-table td {
  padding: 18px 22px; text-align: left; border-bottom: 1px solid var(--line);
}
.compare-table th {
  background: var(--surface2); font-size: 13px; font-weight: 600;
  color: var(--muted); text-transform: uppercase; letter-spacing: .6px;
  position: sticky; top: 72px; z-index: 3;
}
.compare-table td { font-size: 14px; color: var(--txt2); }
.compare-table .col-highlight { background: var(--accent-soft); }
.compare-table th.col-highlight { color: var(--accent2); }
.compare-table td.col-highlight { background: var(--accent-soft); color: var(--txt); font-weight: 600; }
.compare-table .yes { color: var(--ok); font-weight: 600; }
.compare-table .no { color: var(--muted2); }
.compare-table th:first-child, .compare-table td.feat-name {
  position: sticky; left: 0; z-index: 2;
}
.compare-table th:first-child { background: var(--surface2); z-index: 4; }
.compare-table .feat-name {
  font-weight: 600; color: var(--txt); background: var(--surface);
  box-shadow: 1px 0 0 var(--line);
}
.compare-table tr:last-child td { border-bottom: none; }

/* ===== 架构图 ===== */
.arch {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 28px;
  align-items: stretch; margin-top: 56px;
}
.arch-col { display: flex; flex-direction: column; gap: 16px; justify-content: center; }

.arch-node {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 16px 20px;
  display: flex; align-items: center; gap: 14px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.arch-node:hover {
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.arch-node .ico {
  width: 42px; height: 42px; border-radius: 11px;
  background: var(--gradient-soft); border: 1px solid var(--accent-border);
  display: flex; align-items: center; justify-content: center; flex: none;
}
.arch-node .ico svg { width: 22px; height: 22px; color: var(--accent2); }
.arch-node .t { font-size: 14.5px; font-weight: 600; }
.arch-node .s { font-size: 12.5px; color: var(--muted); margin-top: 3px; }

.arch-center {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 12px; min-width: 260px;
}
.arch-core {
  background: var(--surface); border: 1px solid var(--line2);
  border-radius: var(--r-lg); padding: 30px; text-align: center;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.arch-core::before {
  content: ""; position: absolute; top: -80px; left: 50%;
  transform: translateX(-50%); width: 260px; height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
}
.arch-core .logo-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #fff; margin: 0 auto 14px;
  position: relative;
  box-shadow: 0 6px 22px var(--accent-glow);
}
.arch-core h4 { font-size: 18px; position: relative; font-weight: 680; }
.arch-core p { font-size: 13.5px; color: var(--muted); margin-top: 8px; position: relative; }
.arch-caps {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px;
}
.arch-caps span {
  font-size: 12px; background: var(--surface2); border: 1px solid var(--line);
  border-radius: 999px; padding: 5px 14px; color: var(--txt2);
}
.arch-arrow { color: var(--muted2); font-size: 22px; line-height: 1; }

@media (max-width: 860px) {
  .arch { grid-template-columns: 1fr; gap: 18px; }
  .arch-center { flex-direction: row; min-width: 0; gap: 8px; margin: 4px 0; }
  .arch-arrow { transform: rotate(90deg); font-size: 20px; }
  .arch-col { gap: 12px; }
}

/* ===== CTA 区块 ===== */
.cta-section { padding: 96px 32px; text-align: center; }

.cta-box {
  max-width: 840px; margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--line2);
  border-radius: var(--r-xl);
  padding: 68px 52px;
  position: relative; overflow: hidden;
  box-shadow: 0 0 0 1px var(--accent-soft), 0 30px 80px rgba(0,0,0,.38);
}
.cta-box::before {
  content: ""; position: absolute; top: -140px; left: 50%;
  transform: translateX(-50%);
  width: 360px; height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
}
.cta-box h2 {
  font-size: clamp(26px, 3.2vw, 34px); font-weight: 740;
  margin-bottom: 18px; position: relative; letter-spacing: -.5px;
}
.cta-box > p {
  color: var(--muted); font-size: 16px; margin-bottom: 32px; position: relative;
}
.cta-cmd {
  word-break: break-word; overflow-wrap: anywhere; text-align: left;
  position: relative;
}
.cta-cmd-wrap {
  position: relative;
  max-width: 540px;
  margin: 22px auto;
}
.cta-copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--code-border);
  background: var(--code-bar);
  color: var(--code-fg);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.cta-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent2);
  background: var(--surface2);
}
.cta-copy-btn.copied {
  border-color: var(--ok-border);
  color: var(--ok);
}
.cta-creds {
  font-size: 13px;
  color: var(--muted);
  margin: 12px auto 0;
  max-width: 540px;
  line-height: 1.55;
}
.cta-creds::before {
  content: "🛡 ";
}

/* 信任徽章条 */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 28px;
}
.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--txt2);
  letter-spacing: .1px;
}
.trust-badge svg {
  width: 14px;
  height: 14px;
  color: var(--ok);
  flex: none;
}

/* skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 999;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
}
.skip-link:focus {
  left: 16px;
}

/* page hero 统一内页顶距 */
.page-hero { padding-top: 128px; }

/* 证言署名 */
.proof-quote footer,
.testi-by {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  font-style: normal;
}
.proof-quote footer::before,
.testi-by::before {
  content: "— ";
  color: var(--muted2);
}

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--line);
  padding: 60px 32px 40px; background: var(--bg2);
}
.footer-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; justify-content: space-between; align-items: flex-start;
  flex-wrap: wrap; gap: 40px;
}
.footer-brand { max-width: 340px; }
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p {
  color: var(--muted); font-size: 13.5px; line-height: 1.72;
}
.footer-links { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-col h4 {
  font-size: 14px; font-weight: 660; margin-bottom: 16px;
  color: var(--txt); letter-spacing: .1px;
}
.footer-col a {
  display: block; color: var(--muted); font-size: 14px;
  padding: 6px 0; transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--accent2); }
.footer-bottom {
  text-align: center; color: var(--muted2); font-size: 13px;
  padding-top: 36px; border-top: 1px solid var(--line);
  margin-top: 40px;
}

/* ===== 滚动渐入动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: none; }
}
.js .reveal {
  opacity: 0; transform: translateY(32px);
  transition: opacity .7s cubic-bezier(.22, .61, .36, 1), transform .7s cubic-bezier(.22, .61, .36, 1);
}
.js .reveal.visible { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg2); flex-direction: column;
    padding: 20px 32px; gap: 18px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg);
  }
  .nav-links.open a.active::after { display: none; }
  .hero h1 { font-size: clamp(32px, 7.5vw, 44px); }
  .section h1, .section h2 { font-size: clamp(26px, 5.5vw, 32px); }
  .scenario { grid-template-columns: 1fr; padding: 32px; }
  .scenario:nth-child(even) .scenario-visual { order: 0; }
  .nav-inner { padding: 12px 20px; gap: 10px; }
  .lang-toggle { padding: 7px 12px; font-size: 12px; }
  .nav-cta { padding: 9px 16px; font-size: 13px; }
}

@media (max-width: 600px) {
  .hero { padding: 132px 20px 68px; min-height: auto; }
  .hero > .hero-inner > p, .hero .hero-inner > p { font-size: 16px; }
  .section { padding: 76px 20px; }
  .section-head { margin-bottom: 48px; }
  .cta-box { padding: 44px 24px; }
  .hero-stats { gap: 36px; flex-direction: column; }
  .hero-stat .num { font-size: 36px; }
}

@media (max-width: 480px) {
  .nav-inner { padding: 12px 18px; }
  .nav-cta { padding: 8px 14px; font-size: 13px; }
  .hero-stats { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 32px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; justify-content: center; }
}

@media (max-width: 400px) {
  .nav-logo span:not(.logo-icon) { display: none; }
  .footer-links { gap: 32px; }
}

/* 平台适配 */
@media (max-width: 520px) {
  .lang-toggle { padding: 6px 10px; font-size: 11px; }
  .nav-cta { padding: 8px 12px; font-size: 12px; }
}

/* ===== 功能分组（features 页） ===== */
.feat-groups { display: flex; flex-direction: column; gap: 88px; }

.feat-group-head {
  display: flex; align-items: center; gap: 22px; margin-bottom: 40px;
}
.feat-group-tag {
  flex: none; width: 58px; height: 58px; border-radius: 15px;
  background: var(--gradient); color: #fff;
  font-size: 22px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 22px var(--accent-glow);
}
.feat-group-head h3 { font-size: 24px; font-weight: 720; margin-bottom: 6px; letter-spacing: -.4px; }
.feat-group-head p { font-size: 14.5px; color: var(--muted); margin: 0; }
.feat-group .feature-grid { margin-top: 0; }
.feat-group { scroll-margin-top: 88px; }

.feat-layout {
  display: grid; grid-template-columns: 240px 1fr; gap: 52px; align-items: start; margin-top: 8px;
}
.feat-rail { position: relative; }

.feat-subnav {
  position: sticky; top: 92px; z-index: 20;
  display: flex; flex-direction: column; gap: 3px; padding: 0; margin: 0;
}
.feat-subnav-link {
  display: flex; align-items: center; gap: 11px; text-decoration: none;
  font-size: 14px; color: var(--txt2); padding: 10px 14px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
}
.feat-subnav-link:hover, .feat-subnav-link:focus-visible {
  color: var(--accent2); background: var(--surface2);
}
.feat-subnav-link.active {
  color: var(--txt); background: var(--surface2);
  border-left-color: var(--accent); font-weight: 600;
}
.rail-num {
  flex: none; width: 28px; height: 28px; border-radius: 8px;
  background: var(--surface2); color: var(--muted);
  font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-fast);
}
.feat-subnav-link.active .rail-num { background: var(--accent); color: #fff; }
.rail-txt { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.feat-badge {
  display: inline-block; margin-left: 10px; padding: 4px 11px;
  border-radius: 999px; font-size: 12px; font-weight: 700;
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--purple));
  vertical-align: middle;
}
.feat-val {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 13px; line-height: 1.6; color: var(--accent2);
  padding-top: 16px; margin-top: 4px;
  border-top: 1px solid var(--line);
  position: relative; z-index: 1;
}
.feat-val svg { flex: none; width: 16px; height: 16px; margin-top: 1px; color: var(--accent); }

@media (max-width: 1024px) {
  .feat-layout { grid-template-columns: 1fr; gap: 0; }
  .feat-subnav {
    position: sticky; top: 76px; flex-direction: row; gap: 6px;
    overflow-x: auto; padding: 10px 0; margin-bottom: 20px;
    -webkit-overflow-scrolling: touch;
  }
  .feat-subnav-link {
    padding: 5px 12px; border-left: none; border-radius: 999px;
    background: var(--surface); border: 1px solid var(--line2);
  }
  .feat-subnav-link.active {
    border-color: var(--accent); background: var(--accent-soft);
  }
  .feat-subnav-link.active .rail-num { background: var(--accent); }
  .rail-txt { display: none; }
  .rail-num { width: auto; height: auto; border-radius: 999px; padding: 0 6px; background: transparent; }
}

/* ===== FAQ 手风琴 ===== */
.faq-list { display: flex; flex-direction: column; gap: 14px; max-width: 840px; margin: 0 auto; }
.faq-item {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.open { border-color: var(--line2); box-shadow: var(--shadow-sm); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: none; border: none; cursor: pointer; text-align: left;
  padding: 22px 26px; font-size: 16px; font-weight: 600;
  color: var(--txt); font-family: inherit;
  transition: color var(--transition-fast), background var(--transition-fast);
}
.faq-q:hover { color: var(--accent2); background: var(--bg2); }
.faq-q .faq-chev {
  width: 20px; height: 20px; flex: none; color: var(--muted);
  transition: transform var(--transition-fast);
}
.faq-item.open .faq-q .faq-chev {
  transform: rotate(180deg); color: var(--accent2);
}
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-a p {
  padding: 0 26px 24px; color: var(--txt2);
  font-size: 15px; line-height: 1.85; margin: 0;
}

@media (max-width: 600px) {
  .feat-groups { gap: 60px; }
  .feat-group-head { gap: 16px; margin-bottom: 28px; }
  .feat-group-tag { width: 48px; height: 48px; font-size: 19px; border-radius: 13px; }
  .feat-group-head h3 { font-size: 21px; }
  .faq-q { font-size: 15px; padding: 20px 20px; }
  .faq-a p { padding: 0 20px 20px; }
}

/* ===== 技术生态集成 ===== */
.integrations {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(148px, 100%), 1fr));
  gap: 18px;
}
.integration-item {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 32px 18px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.integration-item:hover {
  border-color: var(--accent-border);
  transform: translateY(-5px);
  box-shadow: var(--shadow), 0 0 0 1px var(--accent-soft);
}
.integration-ico {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--gradient-soft); border: 1px solid var(--accent-border);
  display: flex; align-items: center; justify-content: center;
}
.integration-ico svg { width: 27px; height: 27px; color: var(--accent2); }
.integration-item span {
  font-size: 14px; font-weight: 600; color: var(--txt2);
  word-break: break-word;
}

/* ===== 端口转发展示 ===== */
.fwd-showcase {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.fwd-copy .section-tag { margin-bottom: 14px; }
.fwd-copy h2 {
  font-size: clamp(26px, 3.2vw, 34px); font-weight: 720;
  letter-spacing: -.6px; line-height: 1.20; margin-bottom: 18px;
}
.fwd-lead {
  color: var(--txt2); font-size: 15px; line-height: 1.82; margin-bottom: 26px;
}
.fwd-points {
  list-style: none; padding: 0; margin: 0 0 30px;
  display: flex; flex-direction: column; gap: 14px;
}
.fwd-points li {
  display: flex; align-items: flex-start; gap: 14px;
  font-size: 14.5px; color: var(--txt2); line-height: 1.62;
}
.fwd-points li svg { width: 20px; height: 20px; flex: none; margin-top: 2px; color: var(--ok); }
.fwd-visual { position: relative; }

.fwd-term {
  background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--r-lg); overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.fwd-term-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 18px; background: var(--code-bar);
  border-bottom: 1px solid var(--code-border);
}
.fwd-term-bar span { width: 12px; height: 12px; border-radius: 50%; background: var(--muted2); }
.fwd-term-bar span:nth-child(1) { background: var(--crit); }
.fwd-term-bar span:nth-child(2) { background: var(--warn); }
.fwd-term-bar span:nth-child(3) { background: var(--ok); }

.fwd-term-body {
  padding: 24px 26px;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px; line-height: 2.1; color: var(--code-fg);
}
.fwd-line { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fwd-indent { padding-left: 22px; }
.fwd-c-muted { color: var(--code-muted); }
.fwd-c-ok { color: var(--code-ok); font-weight: 600; }
.fwd-c-accent { color: var(--code-accent); font-weight: 600; }

@media (max-width: 900px) {
  .fwd-showcase { grid-template-columns: 1fr; gap: 40px; }
  .fwd-copy h2 { font-size: 28px; }
  .fwd-line { white-space: normal; word-break: break-word; }
}

/* ===== Android 展示 ===== */
.android-showcase {
  display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: center;
}
.android-copy .section-tag { margin-bottom: 14px; }
.android-copy h2 {
  font-size: clamp(26px, 3.2vw, 34px); font-weight: 720;
  letter-spacing: -.6px; line-height: 1.20; margin-bottom: 18px;
}
.android-lead { color: var(--txt2); font-size: 15px; line-height: 1.82; margin-bottom: 26px; }
.android-points {
  list-style: none; padding: 0; margin: 0 0 30px;
  display: flex; flex-direction: column; gap: 15px;
}
.android-points li {
  display: flex; align-items: flex-start; gap: 14px;
  font-size: 14.5px; color: var(--txt2); line-height: 1.62;
}
.android-points li svg { width: 20px; height: 20px; flex: none; margin-top: 2px; color: var(--ok); }
.android-visual { position: relative; display: flex; justify-content: center; }

.android-badges { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 10px; }
.android-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface2); border: 1px solid var(--line2);
  border-radius: 999px; padding: 9px 18px;
  font-size: 13px; color: var(--txt2); font-weight: 600;
}
.android-badge svg { width: 16px; height: 16px; color: var(--accent2); }

.android-phone {
  width: 268px; height: 540px; border-radius: 38px; background: var(--surface);
  border: 2px solid var(--line2); padding: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,.38); position: relative;
  display: flex; flex-direction: column;
}
.android-phone::before {
  content: ""; position: absolute; top: 18px; left: 50%;
  transform: translateX(-50%); width: 68px; height: 6px;
  border-radius: 99px; background: var(--line2);
}
.android-screen {
  margin-top: 28px; flex: 1; border-radius: 24px;
  background: var(--code-bg); border: 1px solid var(--code-border);
  overflow: hidden; display: flex; flex-direction: column;
}
.android-screen-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 13px 16px; background: var(--code-bar);
  border-bottom: 1px solid var(--code-border);
  font-size: 12px; color: var(--code-muted);
}
.android-screen-bar .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--ok);
}
.android-screen-body { padding: 20px 16px; display: flex; flex-direction: column; gap: 15px; }
.android-metric {
  background: var(--surface2); border: 1px solid var(--line);
  border-radius: 13px; padding: 15px 16px;
}
.android-metric .l { font-size: 11px; color: var(--muted); margin-bottom: 7px; }
.android-metric .v { font-size: 22px; font-weight: 800; color: var(--txt); }
.android-metric .v small { font-size: 13px; font-weight: 600; color: var(--ok); margin-left: 7px; }

.android-term-row {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface2); border: 1px solid var(--line);
  border-radius: 11px; padding: 11px 14px;
  font-size: 12px; color: var(--code-ok); font-family: monospace;
}
.android-term-row svg { width: 15px; height: 15px; color: var(--accent2); flex: none; }

@media (max-width: 900px) {
  .android-showcase { grid-template-columns: 1fr; gap: 44px; }
  .android-copy h2 { font-size: 28px; }
  .android-visual { order: -1; }
}

/* ===== 社会证明 ===== */
.proof-section { padding: 76px 32px; }

.proof-strip {
  display: flex; gap: 22px; flex-wrap: wrap; justify-content: center; margin-bottom: 44px;
}
.proof-item {
  position: relative; padding: 28px 24px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); min-width: 230px; text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.proof-item:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.proof-item::before {
  content: "✓"; position: absolute; left: 16px; top: 16px;
  color: var(--ok); font-weight: 800; font-size: 16px;
}
.proof-item strong {
  display: block; font-size: 23px; color: var(--txt);
  margin-bottom: 6px; letter-spacing: -.4px;
}
.proof-item span { font-size: 13px; color: var(--muted); }

.proof-quotes {
  display: flex; gap: 26px; flex-wrap: wrap; justify-content: center;
  max-width: 920px; margin: 0 auto;
}
.proof-quote {
  margin: 0; flex: 1; min-width: 270px;
  background: var(--surface); border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--r);
  padding: 26px 28px; font-size: 15.5px; line-height: 1.72;
  color: var(--txt2); position: relative;
}
.proof-quote::before {
  content: "\201C"; position: absolute; top: 6px; right: 20px;
  font-size: 48px; line-height: 1; color: var(--line2);
  font-family: Georgia, serif;
}
.proof-quote p { margin: 0; }

/* ===== 联系我们卡片 ===== */
.contact-card { display: flex; flex-direction: column; }
.contact-ic {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; position: relative; z-index: 1;
}
.contact-ic svg { width: 27px; height: 27px; }
.contact-card .desc { flex: 1; }
.contact-addr {
  display: inline-block; font-size: 17px; font-weight: 600;
  color: var(--accent2); word-break: break-all;
  margin-bottom: 20px; position: relative; z-index: 1;
  transition: color var(--transition-fast);
}
.contact-addr:hover { color: var(--accent); }
.contact-btn { align-self: flex-start; position: relative; z-index: 1; }

.contact-resp {
  margin-top: 60px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 44px; text-align: center;
}
.contact-resp > h3 { font-size: 21px; font-weight: 720; margin-bottom: 32px; letter-spacing: -.4px; }
.contact-resp-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.contact-resp-item { padding: 0 14px; }
.contact-resp-t {
  font-size: 24px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}
.contact-resp-d { font-size: 13.5px; color: var(--muted); line-height: 1.62; }

/* ===== 企业级区块 ===== */
.ent-band {
  margin-top: 60px;
  background: var(--gradient-soft);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 48px 44px; text-align: center;
}
.ent-band .section-tag { margin-bottom: 16px; }
.ent-band h2 {
  font-size: clamp(26px, 3.2vw, 36px); font-weight: 800;
  letter-spacing: -.6px; margin-bottom: 16px;
}
.ent-band p {
  max-width: 680px; margin: 0 auto;
  color: var(--muted); font-size: 16px; line-height: 1.72;
}

.ent-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(230px, 100%), 1fr));
  gap: 22px; margin-top: 52px;
}
.ent-step {
  position: relative; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 30px 26px; transition: box-shadow var(--transition);
}
.ent-step:hover { box-shadow: var(--shadow); }
.ent-step::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--gradient);
}
.ent-step-n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 13px;
  margin-bottom: 18px; font-weight: 800; font-size: 17px;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid var(--accent-border);
}
.ent-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.ent-step p { font-size: 14.5px; color: var(--muted); line-height: 1.68; }

@media (max-width: 700px) {
  .contact-resp { padding: 32px 22px; }
  .contact-resp-grid { grid-template-columns: 1fr; gap: 22px; }
  .ent-band { padding: 36px 24px; }
}

/* ===== 交互细节（无障碍与反馈） ===== */
a:focus-visible, button:focus-visible, select:focus-visible,
.btn-primary:focus-visible, .btn-secondary:focus-visible, .nav-cta:focus-visible,
.lang-toggle:focus-visible, .faq-q:focus-visible, .nav-toggle:focus-visible, .theme-toggle:focus-visible {
  outline: 2px solid var(--accent2); outline-offset: 3px; border-radius: var(--r-sm);
}

/* ===== 主题切换按钮 ===== */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--surface2); border: 1px solid var(--line2);
  color: var(--txt2); cursor: pointer; flex: none;
  transition: all var(--transition-fast);
}
.theme-toggle:hover {
  border-color: var(--accent); color: var(--accent2);
  transform: translateY(-2px); box-shadow: var(--shadow-sm);
}

/* ===== 移动端吸底 CTA ===== */
.mobile-cta {
  position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 120;
  display: none; align-items: center; justify-content: center; gap: 8px;
  background: var(--gradient); color: #fff; text-decoration: none;
  padding: 15px 22px; border-radius: var(--r); font-weight: 700;
  font-size: 15px; box-shadow: 0 12px 40px rgba(79,110,246,.4);
  opacity: 0; transform: translateY(24px); pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  backdrop-filter: blur(12px);
}
.mobile-cta:active { transform: scale(.98); }
@media (max-width: 640px) {
  .mobile-cta.show { display: flex; opacity: 1; transform: none; pointer-events: auto; }
}
@media (max-width: 400px) {
  .mobile-cta { left: 12px; right: 12px; bottom: 12px; padding: 14px 18px; font-size: 14px; }
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed; right: 24px; bottom: 28px;
  width: 48px; height: 48px; border-radius: 50%;
  border: 1px solid var(--line2); background: var(--surface-glass);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  color: var(--txt); display: flex; align-items: center; justify-content: center;
  cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition-fast), bottom var(--transition);
  z-index: 60; box-shadow: var(--shadow-lg);
}
@media (max-width: 640px) {
  body.has-mobile-cta .back-to-top { bottom: 88px; }
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--surface2); color: var(--accent2); }
.back-to-top svg { width: 22px; height: 22px; }

/* ===== 邮件订阅 ===== */
.subscribe-section { padding: 92px 32px; }
.subscribe-box {
  max-width: 660px; margin: 0 auto; text-align: center;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 52px 44px;
}
.subscribe-box .section-tag { margin-bottom: 12px; }
.subscribe-box h2 { font-size: 26px; font-weight: 720; margin-bottom: 26px; letter-spacing: -.4px; }
.subscribe-form {
  display: flex; gap: 13px; max-width: 480px; margin: 0 auto;
  flex-wrap: wrap; justify-content: center;
}
.subscribe-input {
  flex: 1; min-width: 230px; padding: 14px 20px;
  border-radius: var(--r-sm); border: 1px solid var(--line2);
  background: var(--bg); color: var(--txt); font-size: 15px;
  font-family: inherit; transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.subscribe-input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.subscribe-note { font-size: 13px; color: var(--muted); margin-top: 18px; }
.subscribe-ok { font-size: 14.5px; color: var(--ok); margin-top: 16px; font-weight: 600; }

/* ===== 主题过渡平滑 ===== */
body, .section, .footer, .cta-box, .compare-table-wrap {
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

/* ===== 减少动效（无障碍） ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
  .hero-bg::before, .hero-bg::after { animation: none !important; }
}

/* ===== 客户痛点带（features 页 · 不覆盖首页 pain-grid） ===== */
.pain-band { margin-top: 32px; }
.pain-band .pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.pain-band .pain-card {
  padding: 24px 22px;
}
.pain-ico {
  width: 44px; height: 44px; border-radius: 13px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  background: var(--warn-soft); color: var(--warn);
  border: 1px solid var(--warn-border);
}
.pain-ico svg { width: 23px; height: 23px; }
@media (max-width: 900px) { .pain-band .pain-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pain-band .pain-grid { grid-template-columns: 1fr; } }

/* ===== 痛点条 + role chips ===== */
.feat-pain {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--warn-soft); border: 1px solid var(--warn-border);
  color: var(--txt); border-radius: var(--r);
  padding: 14px 16px; margin: 18px 0 6px;
  font-size: .94rem; line-height: 1.58;
}
.feat-pain svg { width: 19px; height: 19px; flex: none; color: var(--warn); margin-top: 2px; }
.feat-roles {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 6px;
}
.chip {
  font-size: .80rem; font-weight: 600; padding: 4px 12px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); border: 1px solid var(--accent-border);
}

/* ===== 首页 FAQ 预览 ===== */
.faq-preview-list {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  max-width: 960px; margin: 0 auto 36px;
}
.faq-preview-card {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 26px 26px;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.faq-preview-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.faq-pc-q { font-size: 15.5px; font-weight: 660; color: var(--txt); line-height: 1.48; }
.faq-pc-a {
  font-size: 13.5px; color: var(--muted); line-height: 1.62;
  display: -webkit-box; -webkit-line-clamp: 3;
  -webkit-box-orient: vertical; overflow: hidden;
}
.faq-pc-go {
  position: absolute; top: 22px; right: 24px;
  color: var(--accent2); font-weight: 700; opacity: 0;
  transition: opacity var(--transition-fast);
}
.faq-preview-card:hover .faq-pc-go { opacity: 1; }

@media (max-width: 760px) {
  .faq-preview-list { grid-template-columns: 1fr; max-width: 540px; }
}

@media (max-width: 600px) {
  .faq-q { font-size: 15px; padding: 18px 18px; }
  .faq-a p { padding: 0 18px 18px; }
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--muted); margin-bottom: 20px;
}
.breadcrumb a { color: var(--muted); transition: color var(--transition-fast); }
.breadcrumb a:hover { color: var(--accent2); }
.breadcrumb-sep { color: var(--muted2); font-size: 11px; }

/* ===== 首页功能卡片分层布局 ===== */
.feature-grid--hero {
  display: flex; flex-direction: column; gap: 22px;
}
.feature-grid--hero .feature-card--wide {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  padding: 44px 40px;
  border-color: var(--accent-border);
  box-shadow: 0 0 0 1px var(--accent-soft), var(--shadow-lg);
}
.feature-grid--hero .feature-card--wide .feature-icon { margin-bottom: 18px; }
.feature-grid--hero .feature-card--wide h3 { font-size: 24px; }
.feature-grid--hero .feature-card--wide .desc { font-size: 15px; }
.feature-grid--hero .feature-card--wide .feature-visual {
  background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--r); min-height: 200px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.feature-grid--hero .row-2 {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px;
}
.feature-grid--hero .row-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}

.feature-card .learn-more {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13.5px; font-weight: 600; color: var(--accent2);
  margin-top: 14px; transition: gap var(--transition-fast);
}
.feature-card .learn-more:hover { gap: 10px; }

@media (max-width: 900px) {
  .feature-grid--hero .feature-card--wide { grid-template-columns: 1fr; gap: 24px; padding: 30px 24px; }
  .feature-grid--hero .row-3 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .feature-grid--hero .row-2 { grid-template-columns: 1fr; }
}

/* ===== 交叉引导区块 ===== */
.next-pages {
  padding: 72px 32px; background: var(--bg);
}
.next-pages-inner {
  max-width: var(--max-w); margin: 0 auto;
}
.next-pages-head {
  text-align: center; margin-bottom: 36px;
}
.next-pages-head h3 {
  font-size: 20px; font-weight: 700; color: var(--txt); letter-spacing: -.3px;
}
.next-pages-head p {
  font-size: 14px; color: var(--muted); margin-top: 8px;
}
.next-pages-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  max-width: 960px; margin: 0 auto;
}
.next-page-card {
  display: flex; align-items: center; gap: 18px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 24px 26px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.next-page-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.next-page-ico {
  width: 48px; height: 48px; border-radius: 13px; flex: none;
  background: var(--gradient-soft); border: 1px solid var(--accent-border);
  display: flex; align-items: center; justify-content: center;
}
.next-page-ico svg { width: 24px; height: 24px; color: var(--accent2); }
.next-page-text h4 { font-size: 16px; font-weight: 660; color: var(--txt); margin-bottom: 4px; }
.next-page-text p { font-size: 13px; color: var(--muted); line-height: 1.52; }
.next-page-arrow {
  margin-left: auto; color: var(--muted2); font-size: 18px; flex: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
}
.next-page-card:hover .next-page-arrow { color: var(--accent2); transform: translateX(4px); }

@media (max-width: 760px) {
  .next-pages-grid { grid-template-columns: 1fr; max-width: 480px; }
  .next-pages { padding: 56px 20px; }
}

/* ===== 增强页脚（4列） ===== */
.footer-links--4 { gap: 48px; }
.footer-links--4 .footer-col { min-width: 130px; }

/* ===== CTA 信任注脚 ===== */
.cta-trust {
  display: flex; gap: 16px; flex-wrap: wrap; justify-content: center;
  margin-top: 20px; font-size: 13px; color: var(--muted);
}
.cta-trust span {
  display: inline-flex; align-items: center; gap: 6px;
}
.cta-trust span::before {
  content: "✓"; color: var(--ok); font-weight: 700; font-size: 12px;
}

/* ===== 社会证明增强 ===== */
.proof-strip--enhanced {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  margin-bottom: 44px;
}
.proof-item--stat strong {
  font-size: 28px;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (max-width: 760px) {
  .proof-strip--enhanced { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .proof-strip--enhanced { grid-template-columns: 1fr; }
}

/* ===== "为什么免费" 区块 ===== */
.why-free {
  max-width: 800px; margin: 0 auto; text-align: center;
}
.why-free-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  margin-top: 40px;
}
.why-free-item {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 30px 24px; text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}
.why-free-item:hover { border-color: var(--accent-border); transform: translateY(-4px); }
.why-free-ico {
  width: 52px; height: 52px; border-radius: 14px; margin: 0 auto 16px;
  background: var(--ok-soft); border: 1px solid var(--ok-border);
  display: flex; align-items: center; justify-content: center;
}
.why-free-ico svg { width: 26px; height: 26px; color: var(--ok); }
.why-free-item h3, .why-free-item h4 { font-size: 16px; font-weight: 660; margin-bottom: 8px; }
.why-free-item p { font-size: 13.5px; color: var(--muted); line-height: 1.62; }

@media (max-width: 600px) {
  .why-free-grid { grid-template-columns: 1fr; }
}

/* ---------- 联系表单样式 ---------- */
.contact-form-wrap {
  max-width: 640px;
  margin: 64px auto 0;
  padding: 40px 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.contact-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group--full {
  grid-column: 1 / -1;
}
.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--txt2);
}
.form-input {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--bg2);
  color: var(--txt);
  font-size: 15px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-input::placeholder {
  color: var(--muted);
}
.form-textarea {
  resize: vertical;
  min-height: 80px;
  font-family: inherit;
}
@media (max-width: 600px) {
  .contact-form-wrap {
    padding: 28px 20px;
    margin: 40px 16px 0;
  }
  .contact-form-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 联系表单样式 ---------- */
.contact-form-wrap {
  max-width: 640px;
  margin: 64px auto 0;
  padding: 40px 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.contact-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group--full {
  grid-column: 1 / -1;
}
.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--txt2);
}
.form-input {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--bg2);
  color: var(--txt);
  font-size: 15px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-input::placeholder {
  color: var(--muted);
}
.form-textarea {
  resize: vertical;
  min-height: 80px;
  font-family: inherit;
}
@media (max-width: 600px) {
  .contact-form-wrap {
    padding: 28px 20px;
    margin: 40px 16px 0;
  }
  .contact-form-grid {
    grid-template-columns: 1fr;
  }
}