/* ===================================================================
   青云梯 QingYunTi - 品牌专属高科技视觉样式表
   品牌专属：碧空青云深邃意境 + 赛博专线极速流光
   背景特效：高密度超丰富原生 CSS 星辰闪动颗粒群 (Zero JS, 60FPS硬件加速)
   标题动效：标题往右侧位移 + 标题右侧超大尺寸量子雷达跃迁动效
   排版保障：严格锁定布局结构、栅格系统与组件位置
   =================================================================== */

:root {
  /* 品牌专属色板：青云梯 (Azure Cloud & Cyber Sky) */
  --bg-primary: #030712;
  --bg-secondary: #071026;
  --bg-card: rgba(8, 17, 34, 0.72);
  --bg-card-hover: rgba(14, 27, 54, 0.88);
  --border-color: rgba(56, 189, 248, 0.12);
  --border-focus: rgba(56, 189, 248, 0.5);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* 青云梯专属流光渐变：青空之蓝 -> 科技深紫 */
  --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #6366f1 100%);
  --azure-glow: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  --accent-cyan: #38bdf8;
  --accent-sky: #0ea5e9;
  --accent-indigo: #818cf8;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.65), 0 0 20px -5px rgba(56, 189, 248, 0.08);
  --shadow-glow: 0 0 35px -5px rgba(14, 165, 233, 0.35), 0 0 15px rgba(56, 189, 248, 0.2);
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===================================================================
   无障碍增强 (Accessibility - A11y)
   1. 键盘跳步直接访问主体内容 (Skip to main content)
   2. 清晰的键盘聚焦轮廓 (:focus-visible)
   3. 尊重前庭觉减弱动态偏好 (prefers-reduced-motion)
   =================================================================== */
.skip-to-content {
  position: absolute;
  top: -999px;
  left: 20px;
  z-index: 9999;
  padding: 12px 20px;
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.6);
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-to-content:focus {
  top: 20px;
  outline: 3px solid #ffffff;
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 网站地图结构复用类 (替代行内样式) */
.sitemap-list {
  list-style: none;
  padding-left: 0;
}

.sitemap-item {
  margin-bottom: 14px;
}

.sitemap-link {
  color: var(--accent-cyan);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: color 0.2s ease;
}

.sitemap-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

.sitemap-desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-top: 3px;
  line-height: 1.5;
}

/* ===================================================================
   青云梯品牌专属背景：深邃青云星界 + 超高密度多层原生闪动粒子
   =================================================================== */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #030712;
  background-image: 
    radial-gradient(circle at 50% -10%, rgba(14, 165, 233, 0.26) 0%, rgba(3, 7, 18, 0) 65%),
    radial-gradient(circle at 10% 35%, rgba(6, 182, 212, 0.15) 0%, rgba(3, 7, 18, 0) 50%),
    radial-gradient(circle at 90% 65%, rgba(99, 102, 241, 0.16) 0%, rgba(3, 7, 18, 0) 55%),
    radial-gradient(circle at 50% 100%, rgba(16, 185, 129, 0.1) 0%, rgba(3, 7, 18, 0) 50%);
  background-attachment: fixed;
  position: relative;
  overflow-x: hidden;
}

/* 闪动颗粒层 1: 高密度超亮星辰微粒群 (纯原生 CSS 硬件加速 + 全屏矩阵微粒) */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image: 
    /* 全局微星空周期密布粒子 (百余颗微型星点) */
    radial-gradient(1px 1px at 35px 50px, rgba(255, 255, 255, 0.85), transparent),
    radial-gradient(1.5px 1.5px at 140px 130px, rgba(56, 189, 248, 0.9), transparent),
    radial-gradient(1px 1px at 210px 80px, rgba(34, 211, 238, 0.8), transparent),
    radial-gradient(1.5px 1.5px at 80px 220px, rgba(129, 140, 248, 0.85), transparent),
    /* 核心超亮焦点星点群 */
    radial-gradient(1.5px 1.5px at 4% 12%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(2px 2px at 10% 25%, rgba(255, 255, 255, 0.95), transparent),
    radial-gradient(1px 1px at 15% 45%, rgba(14, 165, 233, 0.9), transparent),
    radial-gradient(2.5px 2.5px at 18% 78%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 23% 18%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 28% 60%, rgba(129, 140, 248, 0.95), transparent),
    radial-gradient(1px 1px at 33% 85%, rgba(34, 211, 238, 0.9), transparent),
    radial-gradient(2.5px 2.5px at 38% 30%, rgba(255, 255, 255, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 43% 10%, rgba(56, 189, 248, 0.9), transparent),
    radial-gradient(2px 2px at 47% 50%, rgba(14, 165, 233, 0.95), transparent),
    radial-gradient(1px 1px at 52% 75%, rgba(255, 255, 255, 0.85), transparent),
    radial-gradient(2.5px 2.5px at 57% 22%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 62% 68%, rgba(129, 140, 248, 0.9), transparent),
    radial-gradient(2px 2px at 67% 40%, rgba(255, 255, 255, 0.95), transparent),
    radial-gradient(1px 1px at 72% 88%, rgba(34, 211, 238, 0.9), transparent),
    radial-gradient(2.5px 2.5px at 77% 15%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 82% 58%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 87% 32%, rgba(14, 165, 233, 0.95), transparent),
    radial-gradient(1px 1px at 92% 70%, rgba(56, 189, 248, 0.85), transparent),
    radial-gradient(2.5px 2.5px at 96% 18%, rgba(255, 255, 255, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 8% 92%, rgba(129, 140, 248, 0.9), transparent),
    radial-gradient(2px 2px at 25% 95%, rgba(56, 189, 248, 0.9), transparent),
    radial-gradient(1.5px 1.5px at 50% 92%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 70% 96%, rgba(34, 211, 238, 0.9), transparent),
    radial-gradient(1.5px 1.5px at 88% 90%, rgba(56, 189, 248, 0.9), transparent);
  background-size: 260px 260px, 260px 260px, 260px 260px, 260px 260px, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
  animation: qingyunParticleTwinkle 3.8s ease-in-out infinite alternate;
}

/* 闪动颗粒层 2: 青云深空微光流云尘埃 (交错频率增强立体纵深感) */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image: 
    /* 第二批次互补微光粒子 */
    radial-gradient(2px 2px at 7% 35%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(1.5px 1.5px at 14% 65%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(2px 2px at 21% 15%, rgba(34, 211, 238, 0.85), transparent),
    radial-gradient(2.5px 2.5px at 26% 82%, rgba(255, 255, 255, 0.95), transparent),
    radial-gradient(1px 1px at 36% 45%, rgba(129, 140, 248, 0.9), transparent),
    radial-gradient(2px 2px at 41% 18%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 46% 62%, rgba(255, 255, 255, 0.85), transparent),
    radial-gradient(2px 2px at 55% 82%, rgba(14, 165, 233, 0.95), transparent),
    radial-gradient(1px 1px at 60% 28%, rgba(56, 189, 248, 0.9), transparent),
    radial-gradient(2.5px 2.5px at 65% 52%, rgba(255, 255, 255, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 74% 75%, rgba(34, 211, 238, 0.85), transparent),
    radial-gradient(2px 2px at 80% 25%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(1px 1px at 85% 65%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 91% 42%, rgba(129, 140, 248, 0.9), transparent),
    radial-gradient(2.5px 2.5px at 95% 85%, rgba(56, 189, 248, 0.95), transparent),
    radial-gradient(1.5px 1.5px at 3% 55%, rgba(255, 255, 255, 0.85), transparent),
    radial-gradient(2px 2px at 30% 96%, rgba(14, 165, 233, 0.9), transparent),
    radial-gradient(1.5px 1.5px at 60% 95%, rgba(56, 189, 248, 0.85), transparent);
  background-size: 100% 100%;
  animation: qingyunParticleFloat 5.5s ease-in-out infinite alternate-reverse;
}

@keyframes qingyunParticleTwinkle {
  0% { opacity: 0.3; transform: translateY(0px) scale(0.96); }
  50% { opacity: 1; transform: translateY(-6px) scale(1.04); }
  100% { opacity: 0.45; transform: translateY(-12px) scale(1); }
}

@keyframes qingyunParticleFloat {
  0% { opacity: 0.25; transform: translateX(0px) translateY(0px); }
  50% { opacity: 0.95; transform: translateX(-8px) translateY(-10px); }
  100% { opacity: 0.4; transform: translateX(8px) translateY(-18px); }
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 顶部导航 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(3, 7, 18, 0.85);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  padding: 14px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
  flex-shrink: 0;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.5);
}

.brand-icon svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

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

.nav-link.highlight {
  color: #38bdf8;
  font-weight: 600;
}

.nav-link.highlight::after {
  content: "HOT";
  font-size: 0.62rem;
  position: absolute;
  top: -8px;
  right: -28px;
  background: linear-gradient(135deg, #f43f5e, #e11d48);
  color: #fff;
  padding: 1px 5px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  box-shadow: 0 0 8px rgba(244, 63, 94, 0.6);
}

/* 统一 CTA 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
  min-height: 44px;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(14, 165, 233, 0.7);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* 徽章 Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
}

/* ===================================================================
   主视觉区 (Hero Section) - 2 栏经典布局 (左侧大标题与文案 + 右侧青云梯科技徽标)
   =================================================================== */
.hero-section {
  padding: 65px 0 55px;
  position: relative;
  z-index: 1;
}

.hero-layout-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
  margin-bottom: 50px;
}

/* 左侧内容栏 (Left Column) */
.hero-text-col {
  text-align: left;
}

.hero-text-col .status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
  text-align: left;
}

.brand-title-text {
  font-size: 3.4rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  display: inline-block;
}

.hero-subtitle-line {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: #e2e8f0;
  line-height: 1.3;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  text-align: left;
}

.hero-intro-box {
  background: rgba(8, 17, 34, 0.65);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  max-width: 640px;
  margin: 0 0 32px 0;
  color: #cbd5e1;
  font-size: 0.96rem;
  line-height: 1.75;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  text-align: left;
}

.hero-text-col .hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 0;
}

/* 右侧科技动效栏 (Right Visual Column) */
.hero-visual-col {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-anim-stage {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 动效外层全景微光脉冲光晕 */
.anim-ambient-glow {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.28) 0%, rgba(99, 102, 241, 0.12) 50%, transparent 75%);
  filter: blur(35px);
  animation: techAmbientPulse 3.5s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes techAmbientPulse {
  0% { transform: scale(0.9); opacity: 0.5; }
  100% { transform: scale(1.15); opacity: 0.9; }
}

/* 右侧专属大尺寸青云梯科技徽标 (240px 巨型超能跃迁核心) */
.hero-tech-large {
  width: 240px;
  height: 240px;
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  animation: heroAnimFloat 3.2s ease-in-out infinite;
  cursor: pointer;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.hero-tech-large:hover {
  transform: scale(1.06);
}

@keyframes heroAnimFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

.hero-tech-large .tech-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 4px dashed rgba(56, 189, 248, 0.95);
  box-shadow: 0 0 45px rgba(14, 165, 233, 0.85), inset 0 0 28px rgba(14, 165, 233, 0.45);
  animation: techRadarRotate 8s linear infinite;
}

.hero-tech-large .tech-radar {
  position: absolute;
  inset: 22px;
  border-radius: 50%;
  border: 4px solid transparent;
  border-top-color: #00f2fe;
  border-right-color: #818cf8;
  animation: techRadarReverse 2.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.hero-tech-large .tech-ladder-bars {
  position: absolute;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.hero-tech-large .tech-ladder-bars .bar {
  height: 7px;
  border-radius: 4px;
  background: #38bdf8;
  box-shadow: 0 0 20px #38bdf8;
}

.hero-tech-large .tech-ladder-bars .bar-1 {
  width: 96px;
  animation: ladderStepPulse 1.8s ease-in-out infinite 0s;
}

.hero-tech-large .tech-ladder-bars .bar-2 {
  width: 70px;
  animation: ladderStepPulse 1.8s ease-in-out infinite 0.3s;
}

.hero-tech-large .tech-ladder-bars .bar-3 {
  width: 44px;
  animation: ladderStepPulse 1.8s ease-in-out infinite 0.6s;
}

.hero-tech-large .tech-core-dot {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 30px #00f2fe, 0 0 55px #818cf8, 0 0 80px rgba(56, 189, 248, 0.9);
  animation: techCorePulse 1.8s ease-in-out infinite alternate;
  z-index: 3;
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 25px rgba(56, 189, 248, 0.35));
}

/* ===================================================================
   全面显著放大的超高科技感动态徽标 (128px 巨型超能核心，置于标题右边)
   =================================================================== */
.title-tech-anim {
  position: relative;
  width: 128px; /* 全面显著放大至 128px */
  height: 128px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.title-tech-anim:hover {
  transform: scale(1.08);
}

/* 放大版外层广域脉冲光波 */
.title-tech-anim::before {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.38) 0%, rgba(99, 102, 241, 0.16) 50%, transparent 75%);
  animation: techPulseWave 2.2s ease-out infinite;
}

/* 科技感外圈：大尺寸高精度 HUD 旋转雷达环 */
.tech-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3.5px dashed rgba(56, 189, 248, 0.95);
  box-shadow: 0 0 35px rgba(14, 165, 233, 0.85), inset 0 0 22px rgba(14, 165, 233, 0.45);
  animation: techRadarRotate 8s linear infinite;
}

/* 科技感内圈：双色流光高能扫描环 (加速扫描) */
.tech-radar {
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: #00f2fe;
  border-right-color: #818cf8;
  animation: techRadarReverse 2.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

/* 青云梯阶梯跃迁光条（放大版3阶高亮步梯） */
.tech-ladder-bars {
  position: absolute;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.tech-ladder-bars .bar {
  height: 5px;
  border-radius: 3px;
  background: #38bdf8;
  box-shadow: 0 0 16px #38bdf8;
}

.tech-ladder-bars .bar-1 {
  width: 52px;
  animation: ladderStepPulse 1.8s ease-in-out infinite 0s;
}

.tech-ladder-bars .bar-2 {
  width: 38px;
  animation: ladderStepPulse 1.8s ease-in-out infinite 0.3s;
}

.tech-ladder-bars .bar-3 {
  width: 24px;
  animation: ladderStepPulse 1.8s ease-in-out infinite 0.6s;
}

/* 核心超能微粒 (大尺寸强发光核心) */
.tech-core-dot {
  position: absolute;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 24px #00f2fe, 0 0 45px #818cf8, 0 0 65px rgba(56, 189, 248, 0.85);
  animation: techCorePulse 1.8s ease-in-out infinite alternate;
  z-index: 3;
}

@keyframes techPulseWave {
  0% { transform: scale(0.85); opacity: 0.85; }
  100% { transform: scale(1.5); opacity: 0; }
}

@keyframes techRadarRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes techRadarReverse {
  0% { transform: rotate(360deg) scale(0.96); }
  50% { transform: rotate(180deg) scale(1.04); }
  100% { transform: rotate(0deg) scale(0.96); }
}

@keyframes ladderStepPulse {
  0%, 100% {
    opacity: 0.28;
    background: #0284c7;
    box-shadow: 0 0 5px #0284c7;
  }
  50% {
    opacity: 1;
    background: #00f2fe;
    box-shadow: 0 0 18px #00f2fe, 0 0 30px #67e8f9;
  }
}

@keyframes techCorePulse {
  0% { transform: scale(0.8); opacity: 0.8; }
  100% { transform: scale(1.45); opacity: 1; box-shadow: 0 0 28px #00f2fe, 0 0 50px #818cf8; }
}

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

.hero-stats {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.stat-item h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.stat-item p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* 区块公用标题 */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1.5px;
  display: inline-block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* 核心优势卡片 (3卡) */
.features-section {
  padding: 70px 0;
  position: relative;
  z-index: 1;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.25s ease;
}

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

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-cyan);
}

.feature-icon-box svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* 流媒体与 AI 支持卡片 */
.multimedia-section {
  padding: 70px 0;
  position: relative;
  z-index: 1;
}

.multimedia-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.media-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.media-card-header {
  margin-bottom: 24px;
}

.media-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.media-badge.stream {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.media-badge.ai {
  background: rgba(147, 51, 234, 0.15);
  color: #c084fc;
  border: 1px solid rgba(147, 51, 234, 0.25);
}

.media-card h3 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.media-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.service-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  transition: all 0.2s ease;
}

.service-pill:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--border-focus);
}

.service-pill svg {
  width: 16px;
  height: 16px;
}

/* 真实价格对比表 */
.pricing-section {
  padding: 70px 0;
  position: relative;
  z-index: 1;
}

.pricing-billing-hint {
  text-align: center;
  margin-top: -30px;
  margin-bottom: 40px;
}

.billing-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  color: var(--accent-cyan);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(13, 27, 54, 0.92) 0%, rgba(7, 16, 34, 0.92) 100%);
  border: 1.5px solid var(--accent-cyan);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}

.pricing-ribbon {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.5);
}

.plan-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-desc {
  color: var(--text-dim);
  font-size: 0.88rem;
  min-height: 42px;
}

.plan-price-wrap {
  margin: 18px 0 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.plan-price {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.plan-price .currency {
  font-size: 1.35rem;
  font-weight: 600;
}

.plan-price .period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.plan-sub-billing {
  font-size: 0.82rem;
  color: #34d399;
  margin-top: 4px;
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  fill: var(--accent-cyan);
  flex-shrink: 0;
}

/* 用户评价 */
.reviews-section {
  padding: 70px 0;
  position: relative;
  z-index: 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;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 14px;
  font-size: 0.9rem;
  letter-spacing: 2px;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

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

.reviewer-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.9rem;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

.reviewer-meta h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.reviewer-meta p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* 常见问题 (FAQ) */
.faq-section {
  padding: 70px 0;
  position: relative;
  z-index: 1;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
  backdrop-filter: blur(12px);
}

.faq-item[open] {
  border-color: var(--border-focus);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-cyan);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* 底部 CTA 激励区 */
.bottom-cta {
  padding: 60px 0 80px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.bottom-cta-box {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  max-width: 900px;
  margin: 0 auto;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-glow);
}

.bottom-cta-box h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.bottom-cta-box p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 28px;
}

/* 页脚 Footer - 严格规范：只保留4个标题，打开新页面展示 */
.footer {
  border-top: 1px solid var(--border-color);
  background: #02050c;
  padding: 45px 0 35px;
  margin-top: auto;
  position: relative;
  z-index: 10;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-muted);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.footer-link:hover {
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  border-color: var(--border-color);
}

.footer-meta {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 20px;
  width: 100%;
}

/* 子页面专属通用样式 */
.subpage-hero {
  padding: 60px 0 40px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  background: rgba(7, 16, 38, 0.5);
  position: relative;
  z-index: 1;
}

.subpage-hero .section-title,
.subpage-hero .section-desc,
.subpage-hero .section-tag {
  text-align: left;
}

/* 子页面标题较长，科技动画尺寸适度适配 */
.subpage-hero .title-tech-anim {
  width: 58px;
  height: 58px;
}

.subpage-hero .tech-ladder-bars .bar-1 { width: 24px; height: 3px; }
.subpage-hero .tech-ladder-bars .bar-2 { width: 17px; height: 3px; }
.subpage-hero .tech-ladder-bars .bar-3 { width: 11px; height: 3px; }
.subpage-hero .tech-core-dot { width: 8px; height: 8px; }

.subpage-content {
  padding: 50px 0 80px;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.doc-section {
  margin-bottom: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.doc-section h2 {
  font-size: 1.38rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-section p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 14px;
}

.doc-section p:last-child {
  margin-bottom: 0;
}

.doc-list {
  list-style: disc inside;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-left: 8px;
}

.doc-list li {
  margin-bottom: 8px;
}

.back-home-wrap {
  text-align: center;
  margin-top: 40px;
}

/* ===================================================================
   SEO 知识百科文章专属样式 (Table of Contents + Article Cards)
   =================================================================== */

.toc-card {
  background: rgba(8, 17, 34, 0.85);
  border: 1.5px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 50px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(56, 189, 248, 0.1);
  backdrop-filter: blur(14px);
}

.toc-header {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.toc-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
}

.toc-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.92rem;
  color: #cbd5e1;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.toc-link:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.35);
  color: var(--accent-cyan);
  transform: translateX(4px);
}

.toc-number {
  color: var(--accent-indigo);
  font-weight: 700;
  font-size: 0.85rem;
}

/* 独立 SEO 文章容器 */
.seo-article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 36px;
  margin-bottom: 48px;
  position: relative;
  scroll-margin-top: 90px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.seo-article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 36px;
  width: 60px;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: var(--radius-pill);
  box-shadow: 0 0 10px #38bdf8;
}

.article-header {
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
}

.article-meta-tags {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.article-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.article-tag.brand {
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border-color: rgba(99, 102, 241, 0.3);
}

.article-word-count {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.article-title {
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
}

.article-body h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #38bdf8;
  margin: 24px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-body p {
  color: #cbd5e1;
  font-size: 0.96rem;
  line-height: 1.85;
  margin-bottom: 16px;
  text-align: justify;
}

.article-body p strong {
  color: #f1f5f9;
}

.article-body ul {
  list-style: disc inside;
  color: #cbd5e1;
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 12px 0 18px 10px;
}

.article-body ul li {
  margin-bottom: 8px;
}

.internal-seo-link {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.internal-seo-link:hover {
  color: #00f2fe;
}

.article-cta-box {
  margin-top: 28px;
  padding: 18px 24px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
  border: 1px dashed rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.article-cta-text {
  font-size: 0.92rem;
  color: #e2e8f0;
}

/* 文章专属内嵌 FAQ 模块 */
.article-faq-wrap {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--border-color);
}

.article-faq-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-wrap .faq-item {
  margin-bottom: 12px;
  background: rgba(255, 255, 255, 0.03);
}

.article-faq-wrap .faq-question {
  padding: 14px 18px;
  font-size: 0.95rem;
}

.article-faq-wrap .faq-answer {
  padding: 0 18px 16px;
  font-size: 0.92rem;
  line-height: 1.75;
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏与按压体验
   =================================================================== */

@media (max-width: 992px) {
  .hero-layout-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-text-col {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .hero-title {
    text-align: center;
  }
  .brand-title-text, .hero-brand-name {
    font-size: 2.8rem;
  }
  .hero-subtitle-line {
    font-size: 1.6rem;
    text-align: center;
  }
  .hero-subtitle {
    text-align: center;
  }
  .hero-intro-box {
    margin: 0 auto 28px;
    text-align: left;
  }
  .hero-text-col .hero-actions {
    justify-content: center;
  }
  .hero-tech-large {
    width: 180px;
    height: 180px;
  }
  .hero-tech-large .tech-ladder-bars .bar-1 { width: 72px; }
  .hero-tech-large .tech-ladder-bars .bar-2 { width: 52px; }
  .hero-tech-large .tech-ladder-bars .bar-3 { width: 32px; }
  .hero-tech-large .tech-core-dot { width: 18px; height: 18px; }
  .title-tech-anim {
    width: 80px;
    height: 80px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    gap: 16px;
  }
  .toc-list-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .brand-title-text, .hero-brand-name {
    font-size: 2.2rem;
  }
  .hero-subtitle-line {
    font-size: 1.35rem;
    text-align: center;
  }
  .hero-subtitle {
    font-size: 1.05rem;
    text-align: center;
  }
  .hero-tech-large {
    width: 140px;
    height: 140px;
  }
  .hero-tech-large .tech-ladder-bars .bar-1 { width: 56px; height: 5px; }
  .hero-tech-large .tech-ladder-bars .bar-2 { width: 40px; height: 5px; }
  .hero-tech-large .tech-ladder-bars .bar-3 { width: 24px; height: 5px; }
  .hero-tech-large .tech-core-dot { width: 14px; height: 14px; }

  .nav-links {
    display: none; /* 移动端精简纯净模式 */
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .multimedia-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 12px;
  }

  .stat-item h3 {
    font-size: 1.45rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 48px; /* 触控手指热区优化 */
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
    width: 100%;
  }

  .footer-link {
    display: block;
    text-align: center;
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .seo-article {
    padding: 24px 20px;
  }

  .article-title {
    font-size: 1.35rem;
  }

  .article-cta-box {
    flex-direction: column;
    align-items: stretch;
  }

  .article-cta-box .btn {
    width: 100%;
  }

  .title-tech-anim {
    width: 60px;
    height: 60px;
  }
}

@media (max-width: 480px) {
  .brand-title-text, .hero-brand-name {
    font-size: 1.85rem;
  }
  .hero-subtitle-line {
    font-size: 1.15rem;
  }
  .hero-tech-large {
    width: 110px;
    height: 110px;
  }
  .hero-tech-large .tech-ladder-bars .bar-1 { width: 44px; height: 4px; }
  .hero-tech-large .tech-ladder-bars .bar-2 { width: 32px; height: 4px; }
  .hero-tech-large .tech-ladder-bars .bar-3 { width: 20px; height: 4px; }
  .hero-tech-large .tech-core-dot { width: 11px; height: 11px; }
  .hero-title {
    font-size: 1.65rem;
  }
  .hero-title-row {
    gap: 10px;
  }
  .hero-subtitle-line {
    font-size: 1.15rem;
  }
  .title-tech-anim {
    width: 48px;
    height: 48px;
  }
  .tech-ladder-bars .bar-1 { width: 20px; }
  .tech-ladder-bars .bar-2 { width: 14px; }
  .tech-ladder-bars .bar-3 { width: 8px; }
  .tech-core-dot { width: 7px; height: 7px; }
  .container {
    padding: 0 16px;
  }
  .doc-section {
    padding: 22px 18px;
  }
}