/* ========================================================
   Shadowrocket Monochrome Blue Theme
   单色系极简风格：全站仅以单一蓝色的深浅与透明度构建层次
   ======================================================== */

:root {
  /* 单色蓝调色阶体系 (Monochrome Blue Scale) */
  --blue-950: #030712; /* 极深蓝黑，主背景 */
  --blue-900: #081326; /* 深海午夜蓝，次级背景 */
  --blue-850: #0d1e3d; /* 卡片与容器基础背景 */
  --blue-800: #132c54; /* 边框/交互悬停底色 */
  --blue-700: #1d427b; /* 强调框线 */
  --blue-600: #2563eb; /* 核心品牌蓝 (Primary Blue) */
  --blue-500: #3b82f6; /* 明亮蓝 (Bright Blue) */
  --blue-400: #60a5fa; /* 浅天蓝 (Accent Light Blue) */
  --blue-300: #93c5fd; /* 辅助文字 / 次级图标 */
  --blue-200: #bfdbfe; /* 正文次级浅蓝 */
  --blue-100: #dbeafe; /* 高清正文白蓝 */
  --blue-50:  #f0f7ff; /* 近白色高光 */

  /* 语义映射 */
  --bg-main: var(--blue-950);
  --bg-sub: var(--blue-900);
  --bg-card: rgba(13, 30, 61, 0.7);
  --bg-card-hover: rgba(19, 44, 84, 0.85);

  --border-subtle: rgba(59, 130, 246, 0.16);
  --border-focus: rgba(59, 130, 246, 0.4);
  --border-glow: rgba(96, 165, 250, 0.7);

  --text-main: var(--blue-50);
  --text-body: var(--blue-100);
  --text-dim: var(--blue-300);
  --text-muted: rgba(147, 197, 253, 0.55);

  --primary: var(--blue-600);
  --primary-hover: var(--blue-500);
  --accent: var(--blue-400);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-blue: 0 10px 30px -10px rgba(37, 99, 235, 0.25);
  --glow-blue: 0 0 25px rgba(59, 130, 246, 0.2);
  --trans: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.6;
  font-size: 15px;
}

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.18) 0%, transparent 60%),
    radial-gradient(circle at 100% 40%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 0% 80%, rgba(37, 99, 235, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--trans);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.skip {
  position: absolute;
  top: -999px;
  left: 20px;
  background: var(--blue-600);
  color: #ffffff;
  padding: 8px 16px;
  z-index: 9999;
  border-radius: var(--radius-sm);
}
.skip:focus {
  top: 10px;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================================
   头部导航 (Site Header)
   ======================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
}

.brand-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--blue-500) 0%, var(--blue-700) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(59, 130, 246, 0.35);
  color: #ffffff;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a {
  color: var(--text-dim);
  font-weight: 500;
  font-size: 14.5px;
  position: relative;
  padding: 6px 0;
}

.site-nav a:hover,
.site-nav a.is-on {
  color: var(--blue-50);
}

.site-nav a.is-on::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--blue-500);
  box-shadow: 0 0 8px var(--blue-500);
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--trans);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-700) 100%);
  color: #ffffff;
  border: 1px solid rgba(147, 197, 253, 0.3);
  box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--blue-500) 0%, var(--blue-600) 100%);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(13, 30, 61, 0.8);
  color: var(--blue-100);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(29, 66, 123, 0.6);
  border-color: var(--border-focus);
  color: var(--text-main);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--blue-300);
  border: 1px solid var(--border-subtle);
}

.btn-ghost:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--blue-50);
  border-color: var(--border-focus);
}

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

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: var(--trans);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 2px;
  background: currentColor;
  left: 0;
  transition: var(--trans);
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* ========================================================
   Hero 首屏 (AIDA: 吸引注意)
   ======================================================== */
.hero {
  padding: 80px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: var(--blue-300);
  font-size: 12.5px;
  font-weight: 500;
  margin-bottom: 24px;
}

.badge-beacon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-400);
  box-shadow: 0 0 10px var(--blue-400);
  animation: pulse-blue 2s infinite;
}

@keyframes pulse-blue {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(96, 165, 250, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(96, 165, 250, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(96, 165, 250, 0); }
}

.hero h1 {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-main);
  margin-bottom: 20px;
}

.grad-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--blue-200) 40%, var(--blue-400) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.lead {
  font-size: 16.5px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 28px;
}

.hero-points {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
  margin-bottom: 32px;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--blue-100);
}

.hero-points svg {
  width: 18px;
  height: 18px;
  color: var(--blue-400);
  flex-shrink: 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-platforms-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.hero-platforms-bar .icons {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--blue-300);
}

.hero-platforms-bar svg {
  width: 18px;
  height: 18px;
}

/* ========================================================
   Hero 右侧客户端模拟界面 (Mock Window)
   ======================================================== */
.mock-container {
  position: relative;
}

.mock-window {
  background: var(--blue-900);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), var(--glow-blue);
  overflow: hidden;
  position: relative;
  transition: var(--trans);
}

.mock-window:hover {
  border-color: var(--border-glow);
}

.mock-window-header {
  height: 42px;
  background: var(--blue-850);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 16px;
  position: relative;
}

.mock-window-dots {
  display: flex;
  gap: 6px;
}

.mock-window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.35);
}

.mock-window-dots span:nth-child(1) { background: rgba(59, 130, 246, 0.6); }

.mock-window-title {
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  pointer-events: none;
}

.mock-window-body {
  padding: 20px;
}

.mock-status-card {
  background: var(--blue-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.mock-status-info h4 {
  font-size: 14.5px;
  color: var(--text-main);
  margin-bottom: 4px;
}

.mock-status-info p {
  font-size: 12px;
  color: var(--blue-400);
  font-family: var(--font-mono);
}

.mock-toggle-btn {
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: var(--blue-600);
  position: relative;
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.6);
}

.mock-toggle-btn::after {
  content: "";
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ffffff;
}

.mock-chart {
  background: rgba(13, 30, 61, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 16px;
}

.mock-chart-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.mock-chart svg {
  width: 100%;
  height: 80px;
  display: block;
}

.mock-nodes-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-node-item {
  background: var(--blue-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
}

.mock-node-item.active {
  border-color: var(--blue-500);
  background: rgba(37, 99, 235, 0.15);
}

.mock-node-left {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-100);
}

.mock-node-ping {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--blue-400);
}

/* 浮动卡片 */
.float-card {
  position: absolute;
  background: var(--blue-900);
  border: 1px solid var(--border-focus);
  backdrop-filter: blur(8px);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float-bob 4s ease-in-out infinite alternate;
}

.float-card.c1 {
  top: -20px;
  right: -20px;
}

.float-card.c2 {
  bottom: -20px;
  left: -20px;
  animation-delay: -2s;
}

@keyframes float-bob {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

.float-card .num {
  font-size: 20px;
  font-weight: 800;
  color: var(--blue-400);
  font-family: var(--font-mono);
  line-height: 1;
}

.float-card .label {
  font-size: 11.5px;
  color: var(--text-dim);
}

/* ========================================================
   平台入口带 (Platform Strip)
   ======================================================== */
.platform-strip {
  padding: 30px 0 60px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: var(--trans);
  position: relative;
  overflow: hidden;
}

.platform-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-blue);
}

.platform-card svg {
  width: 32px;
  height: 32px;
  color: var(--blue-400);
  margin-bottom: 12px;
}

.platform-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.platform-card .os-ver {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.platform-card .ver-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(37, 99, 235, 0.2);
  color: var(--blue-300);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ========================================================
   数据速览 (Stats Band)
   ======================================================== */
.stats-band {
  background: var(--bg-sub);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 44px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item h3 {
  font-size: 38px;
  font-weight: 800;
  color: var(--blue-400);
  font-family: var(--font-mono);
  line-height: 1.1;
  margin-bottom: 6px;
}

.stat-item p {
  font-size: 13.5px;
  color: var(--text-dim);
}

/* ========================================================
   通用的 Section 排版
   ======================================================== */
.section {
  padding: 84px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-sub);
}

.sec-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.sec-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.sec-head p {
  font-size: 15.5px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ========================================================
   六大能力 (Feature Grid)
   ======================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: var(--trans);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-4px);
  box-shadow: var(--shadow-blue);
}

.feature-icon-box {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid var(--border-focus);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-400);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ========================================================
   工作原理 (Tech Grid)
   ======================================================== */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}

.tech-tag {
  display: inline-block;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--blue-400);
  background: rgba(37, 99, 235, 0.2);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.tech-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

.tech-card p.desc {
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 24px;
}

.tech-steps {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.tech-step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.tech-num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 800;
  color: var(--blue-400);
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid var(--border-subtle);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tech-step-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--blue-50);
  margin-bottom: 4px;
}

.tech-step-item p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========================================================
   用户评价 (Review Grid)
   ======================================================== */
.review-rating-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  padding: 14px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.rating-score {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  font-family: var(--font-mono);
}

.rating-stars {
  display: flex;
  gap: 4px;
  color: var(--blue-400);
}

.rating-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.rating-info {
  font-size: 13px;
  color: var(--text-dim);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  transition: var(--trans);
}

.review-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-3px);
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

/* 在单色蓝中通过不同深度层次区分头像 a1 ~ a4 */
.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid var(--border-focus);
}

.avatar.a1 { background: rgba(37, 99, 235, 0.25); color: var(--blue-200); }
.avatar.a2 { background: rgba(59, 130, 246, 0.4);  color: var(--blue-50); }
.avatar.a3 { background: rgba(29, 66, 123, 0.6);  color: var(--blue-300); }
.avatar.a4 { background: rgba(96, 165, 250, 0.3);  color: #ffffff; }

.user-info h4 {
  font-size: 14.5px;
  color: var(--text-main);
}

.user-info .tag {
  font-size: 11.5px;
  color: var(--blue-400);
}

.review-card .stars {
  display: flex;
  gap: 2px;
  color: var(--blue-400);
  margin-bottom: 12px;
}

.review-card .stars svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.review-card p.quote {
  font-size: 13.5px;
  color: var(--blue-100);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.review-card .verified {
  font-size: 11.5px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  border-top: 1px solid var(--border-subtle);
  padding-top: 10px;
}

/* ========================================================
   认证背书 (Trust Grid)
   ======================================================== */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.trust-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--trans);
}

.trust-card:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.trust-card svg {
  width: 36px;
  height: 36px;
  color: var(--blue-400);
  margin-bottom: 12px;
}

.trust-card h3 {
  font-size: 15px;
  color: var(--text-main);
  margin-bottom: 6px;
}

.trust-card p {
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ========================================================
   对比表 (Comparison Table)
   ======================================================== */
.table-wrap {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-blue);
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.cmp-table th,
.cmp-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.cmp-table th {
  background: var(--blue-900);
  color: var(--text-main);
  font-weight: 700;
}

.cmp-table tr:last-child td {
  border-bottom: none;
}

.cmp-table .hl {
  background: rgba(37, 99, 235, 0.12);
  color: var(--blue-50);
  font-weight: 600;
  border-left: 1px solid var(--border-focus);
  border-right: 1px solid var(--border-focus);
}

.cmp-table th.hl {
  background: rgba(37, 99, 235, 0.25);
  color: var(--blue-300);
}

.disclaimer-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-muted);
  text-align: right;
}

/* ========================================================
   常见问题 (FAQ 手风琴)
   ======================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--trans);
}

.faq-item:hover,
.faq-item.open {
  border-color: var(--border-focus);
}

.faq-item button {
  width: 100%;
  padding: 18px 22px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 15.5px;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-item button span:last-child {
  font-size: 20px;
  color: var(--blue-400);
  transition: var(--trans);
}

.faq-item.open button span:last-child {
  transform: rotate(45deg);
}

.faq-item .ans {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
  padding: 0 22px;
}

.faq-item.open .ans {
  max-height: 300px;
  padding: 0 22px 20px;
}

/* ========================================================
   CTA 横幅 (CTA Band)
   ======================================================== */
.cta-band {
  background: linear-gradient(135deg, var(--blue-900) 0%, #0a1f42 100%);
  border-top: 1px solid var(--border-focus);
  border-bottom: 1px solid var(--border-focus);
  padding: 72px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.cta-band p {
  font-size: 16px;
  color: var(--blue-200);
  max-width: 640px;
  margin: 0 auto 32px;
}

.cta-band .actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ========================================================
   页脚 (Site Footer)
   ======================================================== */
.site-footer {
  background: var(--blue-950);
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 32px;
  color: var(--text-dim);
}

.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.foot-grid h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.foot-grid a {
  display: block;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.foot-grid a:hover {
  color: var(--blue-400);
}

.footer-seo {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  margin-bottom: 24px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-seo strong {
  color: var(--blue-300);
}

.copy {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ========================================================
   响应式断点适配
   ======================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .platform-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .review-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .foot-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }
  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--blue-950);
    border-bottom: 1px solid var(--border-focus);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    display: none;
  }
  .site-nav.open {
    display: flex;
  }
  .nav-toggle {
    display: flex;
  }
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tech-grid {
    grid-template-columns: 1fr;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .review-grid {
    grid-template-columns: 1fr;
  }
  .trust-grid {
    grid-template-columns: 1fr;
  }
  .float-card {
    display: none;
  }
  .foot-grid {
    grid-template-columns: 1fr;
  }
  .copy {
    flex-direction: column;
    align-items: flex-start;
  }
}