/* ==========================================================================
   SeeleCloud 希儿云 - 极速轻量原生 CSS 样式表 (style.css)
   基于原生 CSS3 标准编写，0 外部重型依赖，秒开性能保障
   配色系统：量子深空 (#070b14) + 希儿荧光青蓝 (#00f2fe / #38bdf8) + 幻蝶霓紫 (#8b5cf6 / #c084fc)
   ========================================================================== */

:root {
  /* 品牌色彩系统：量子深空 + 冰青蓝 + 冰橙色 */
  --bg-dark: #070b14;
  --bg-deep: #0b1120;
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-card-hover: rgba(22, 33, 62, 0.88);
  --bg-glass: rgba(15, 23, 42, 0.6);
  
  --border-color: rgba(56, 189, 248, 0.16);
  --border-hover: rgba(0, 242, 254, 0.45);
  --border-glow: rgba(255, 118, 25, 0.35);

  --primary-cyan: #00f2fe;
  --primary-sky: #38bdf8;
  --primary-indigo: #6366f1;
  --primary-purple: #8b5cf6;
  --primary-violet: #c084fc;
  --accent-pink: #ff7619; /* 已升级为冰橙主色 */
  
  /* 冰橙色体系 (Ice Orange) */
  --ice-orange: #ff7619;
  --ice-orange-light: #ffaa40;
  --ice-orange-glow: rgba(255, 118, 25, 0.45);

  /* 文字颜色 */
  --text-main: #f8fafc;
  --text-sub: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* 渐变色：粉色全面升级替换为高光冰橙色 */
  --grad-primary: linear-gradient(135deg, #00f2fe 0%, #38bdf8 32%, #ffaa40 68%, #ff7619 100%);
  --grad-cyan: linear-gradient(135deg, #00f2fe 0%, #38bdf8 100%);
  --grad-purple: linear-gradient(135deg, #8b5cf6 0%, #c084fc 100%);
  --grad-orange: linear-gradient(135deg, #ffaa40 0%, #ff7619 100%);
  --grad-card: linear-gradient(180deg, rgba(30, 41, 59, 0.4) 0%, rgba(15, 23, 42, 0.7) 100%);
  --grad-popular: linear-gradient(180deg, rgba(56, 189, 248, 0.12) 0%, rgba(255, 118, 25, 0.08) 100%);

  /* 阴影效果 */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 35px rgba(0, 242, 254, 0.28);
  --shadow-orange-glow: 0 0 35px rgba(255, 118, 25, 0.35);
  --shadow-purple-glow: 0 0 35px rgba(139, 92, 246, 0.32);

  /* 尺寸与间距 */
  --container-width: 1280px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: transparent;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select {
  font: inherit;
}

ul, ol {
  list-style: none;
}

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

/* ==========================================================================
   动态背景 Canvas 与氛围发光体
   ========================================================================== */
#dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

.ambient-glow {
  position: fixed;
  top: -20vh;
  left: 20vw;
  width: 60vw;
  height: 60vh;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.12) 0%, rgba(139, 92, 246, 0.08) 50%, transparent 75%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -20vh;
  right: 10vw;
  width: 50vw;
  height: 50vh;
  background: radial-gradient(circle, rgba(255, 118, 25, 0.08) 0%, rgba(0, 242, 254, 0.06) 50%, transparent 75%);
  filter: blur(90px);
  z-index: 0;
  pointer-events: none;
  animation: floatOrb2 22s ease-in-out infinite alternate;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5vw, 6vh) scale(1.1); }
  100% { transform: translate(-4vw, 3vh) scale(0.95); }
}

@keyframes floatOrb2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-6vw, -5vh) scale(1.08); }
  100% { transform: translate(3vw, -2vh) scale(0.92); }
}

/* ==========================================================================
   通配组件与文字修饰
   ========================================================================== */
.text-gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-cyan {
  color: var(--primary-cyan);
}

.text-purple {
  color: var(--primary-violet);
}

.section-spacing {
  padding: 85px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--primary-cyan);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.section-tag .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary-cyan);
  box-shadow: 0 0 10px var(--primary-cyan);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-desc {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 30%, #ffaa40 70%, #ff7619 100%);
  color: #040812;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(255, 118, 25, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 242, 254, 0.5), 0 0 22px rgba(255, 118, 25, 0.5);
  color: #020617;
}

.btn-outline {
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--primary-sky);
  color: var(--primary-cyan);
  transform: translateY(-2px);
}

.btn-seele {
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 25%, #ffa63d 65%, #ff6600 100%);
  color: #040812;
  font-weight: 800;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 20px rgba(255, 102, 0, 0.45);
}

.btn-seele:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.6), 0 0 25px rgba(255, 118, 25, 0.55);
  color: #000000;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 17px;
  border-radius: var(--radius-md);
}

/* ==========================================================================
   1. 顶部导航栏 (Navbar)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 44px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-sub);
  position: relative;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-cyan);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 18px;
}

/* ==========================================================================
   2. 首屏 Hero 区域 (Hero Section)
   ========================================================================== */
.hero-section {
  padding-top: 155px;
  padding-bottom: 90px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(0, 242, 254, 0.35);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.15);
  border-radius: var(--radius-full);
  margin-bottom: 28px;
}

.hero-badge-tag {
  background: linear-gradient(135deg, #00f2fe, #ff7619);
  color: #060913;
  font-size: 11px;
  font-weight: 800;
  padding: 2px 9px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-badge-text {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-sub);
}

.hero-title {
  font-size: clamp(2.2rem, 3.4vw, 3.25rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.8px;
  margin-bottom: 24px;
  max-width: 1150px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title-line1 {
  display: block;
  margin-bottom: 8px;
}

.hero-title-line2 {
  display: block;
  font-size: clamp(1.45rem, 2.3vw, 2.25rem);
  font-weight: 800;
  color: #f1f5f9;
  letter-spacing: -0.4px;
}

.title-chunk {
  display: inline-block;
  white-space: nowrap;
}

.title-sep {
  display: inline-block;
  margin: 0 6px;
  opacity: 0.65;
  color: var(--primary-sky);
}

.hero-subtitle {
  font-size: 19px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 820px;
  margin: 0 auto 40px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 55px;
  flex-wrap: wrap;
}

/* 核心信任数据条 */
.hero-trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  box-shadow: var(--shadow-md);
}

.trust-item {
  text-align: center;
  position: relative;
}

.trust-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.trust-number {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary-cyan);
  line-height: 1.1;
  margin-bottom: 4px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

.trust-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   3. 专线技术核心优势 (Features)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--grad-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 22px;
  color: var(--primary-cyan);
  transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon-wrap {
  transform: scale(1.1) rotate(5deg);
  background: rgba(0, 242, 254, 0.2);
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ==========================================================================
   4. 全球专线节点集群 (Global Node Network)
   ========================================================================== */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.node-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.node-chip:hover {
  border-color: var(--primary-cyan);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.node-info-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 26px;
  line-height: 1;
}

.node-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.node-type {
  font-size: 12px;
  color: var(--text-muted);
}

.node-status-right {
  text-align: right;
}

.node-ping {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 13px;
  font-weight: 700;
  color: #10b981;
}

.node-badge-tag {
  display: block;
  font-size: 11px;
  color: var(--primary-sky);
}

/* ==========================================================================
   5. 核心价格套餐 - 严格同排展示 (Pricing Section - Strict One Row)
   ========================================================================== */
.pricing-section {
  position: relative;
  background: rgba(11, 17, 32, 0.45);
}

/* 用户指令：所有价格必须严格同排展示 */
.pricing-row-container {
  width: 100%;
  overflow-x: auto;
  padding-bottom: 20px;
  -webkit-overflow-scrolling: touch;
}

.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(230px, 1fr));
  gap: 18px;
  align-items: stretch;
  min-width: 1160px; /* 确保在宽屏下同排无折行，视口变窄时可通过平滑横滑查看 */
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  backdrop-filter: blur(14px);
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-cyan);
  box-shadow: 0 16px 36px rgba(0, 242, 254, 0.22);
}

.pricing-card.popular {
  border-color: rgba(0, 242, 254, 0.6);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.85) 100%);
  box-shadow: 0 12px 35px rgba(0, 242, 254, 0.2);
}

.popular-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f2fe, #ff7619);
  color: #040812;
  font-size: 11px;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(255, 118, 25, 0.45);
  white-space: nowrap;
}

.pricing-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 18px;
  margin-bottom: 18px;
}

.plan-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  min-height: 38px;
  line-height: 1.5;
}

.price-box {
  margin-top: 14px;
}

.price-main {
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.price-symbol {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-cyan);
}

.price-value {
  font-size: 38px;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.price-unit {
  font-size: 13px;
  color: var(--text-muted);
}

.price-sub-calc {
  font-size: 12px;
  color: var(--primary-sky);
  margin-top: 4px;
  font-weight: 600;
}

.plan-specs-list {
  margin: 18px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.plan-spec-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
}

.spec-key {
  color: var(--text-muted);
}

.spec-value {
  font-weight: 700;
  color: var(--text-main);
}

.spec-value.highlight {
  color: var(--primary-cyan);
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 24px;
}

.plan-feature-point {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-sub);
  line-height: 1.45;
}

.plan-feature-point .check-icon {
  color: #10b981;
  font-weight: 800;
  flex-shrink: 0;
}

.pricing-btn-wrap {
  margin-top: auto;
}

.pricing-btn-wrap .btn {
  width: 100%;
}

.pricing-hint {
  font-size: 11.5px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 8px;
}

/* ==========================================================================
   6. 客户端支持与极速使用步骤 (Clients & Steps)
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-bottom: 45px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.client-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-cyan);
  background: var(--bg-card-hover);
}

.client-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

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

.client-apps {
  font-size: 12px;
  color: var(--primary-sky);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  position: relative;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--grad-primary);
  color: #040812;
  font-size: 20px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(0, 242, 254, 0.4);
}

.step-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ==========================================================================
   7. 技术文章专栏预览 (Articles Section)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.article-category {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--primary-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}

.article-card-title:hover {
  color: var(--primary-cyan);
}

.article-card-excerpt {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-top: 14px;
  font-size: 12px;
  color: var(--text-dim);
}

.article-read-link {
  color: var(--primary-sky);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-read-link:hover {
  color: var(--primary-cyan);
  transform: translateX(3px);
}

/* ==========================================================================
   8. 用户真实评价 (User Reviews - 用户指令明确要求放在最下方)
   ========================================================================== */
.reviews-section {
  position: relative;
  background: rgba(11, 17, 32, 0.6);
  border-top: 1px solid rgba(56, 189, 248, 0.1);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}

.review-card:hover {
  border-color: var(--primary-cyan);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.review-rating {
  color: #f59e0b;
  font-size: 16px;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 22px;
  position: relative;
  font-style: italic;
}

.reviewer-profile {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 800;
  color: #040812;
  flex-shrink: 0;
}

.reviewer-details {
  flex-grow: 1;
}

.reviewer-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.reviewer-verified {
  font-size: 11px;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  padding: 1px 7px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.reviewer-role {
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ==========================================================================
   9. 常见问题 FAQ (FAQ Section - 用户指令明确要求放在最下方)
   ========================================================================== */
.faq-section {
  position: relative;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: rgba(56, 189, 248, 0.35);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: var(--text-main);
  font-size: 16.5px;
  font-weight: 700;
  text-align: left;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary-cyan);
}

.faq-icon {
  font-size: 20px;
  color: var(--primary-sky);
  transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 22px;
}

/* ==========================================================================
   10. 页脚与权威外链 (Footer & External Links)
   ========================================================================== */
.site-footer {
  background: #04070d;
  border-top: 1px solid rgba(56, 189, 248, 0.15);
  padding: 70px 0 30px;
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 340px;
}

.footer-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--primary-cyan);
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  font-size: 13.5px;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--primary-cyan);
}

/* 权威外链专区 (External Authority Links) */
.footer-external-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.ext-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-sub);
  transition: all var(--transition-fast);
}

.ext-badge:hover {
  border-color: var(--primary-sky);
  color: var(--primary-cyan);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: var(--text-dim);
}

.footer-copyright span {
  color: var(--primary-sky);
}

/* ==========================================================================
   响应式断点适配 (Responsive Design)
   ========================================================================== */
@media (max-width: 1200px) {
  .hero-title {
    font-size: 42px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .hero-trust-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .trust-item:nth-child(2)::after {
    display: none;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .nav-menu {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 26px;
  }
  .hero-title-line2 {
    font-size: 19px;
  }
  .title-chunk {
    white-space: normal;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .section-title {
    font-size: 26px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .nodes-grid {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .hero-trust-bar {
    grid-template-columns: 1fr;
  }
  .trust-item::after {
    display: none !important;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}