/* ==================================================
   杨帆云 - 风帆切面系统 专属样式表 (style.css)
   Brand: 杨帆云 (YangFan Cloud)
   Visual System: 风帆切面系统 (Sail Facet System)
   ================================================== */

:root {
  /* 品牌色彩系统 (Brand Color System) */
  --bg: #F7F8F5;          /* 主背景: 暖白灰 */
  --surface: #FFFFFF;     /* 纯白切面 */
  --text: #17242D;        /* 主文字: 深岩青灰 */
  --body: #5D6870;        /* 正文字: 中深灰 */
  --muted: #89939A;       /* 次级灰 */
  --navy: #193F59;        /* 深海蓝 (15%) */
  --bay-blue: #397797;    /* 海湾蓝 (7%) */
  --bay-mid: #568BA4;     /* 中海蓝 */
  --bay-soft: #E4F0F4;    /* 浅海蓝 (4%) */
  --canvas: #F3F0E8;      /* 帆布白 (70%群组) */
  --canvas-dark: #E6E0D3; /* 深帆布 */
  --coral: #C95F4A;       /* 珊瑚红 (2% 点睛/CTA) */
  --coral-soft: #F5E6E1;  /* 浅珊瑚 */
  --brass: #B29158;       /* 黄铜 (2% 标签/标识) */
  --brass-soft: #ECE2CF;  /* 浅黄铜 */
  --border: #D7DFE1;      /* 基础边框 */
  --border-dark: #BFCED3; /* 强调边框 */
  
  /* 几何与阴影 */
  --radius-sm: 4px;
  --radius-md: 6px;
  --shadow-subtle: 0 14px 42px rgba(23, 36, 45, 0.045);
  
  /* 排版与字阶 */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --lh-body: 1.8;
  --lh-heading: 1.25;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-stack);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--body);
  line-height: var(--lh-body);
  overflow-x: hidden;
}

/* 焦点指示 */
:focus-visible {
  outline: 2px solid var(--bay-blue);
  outline-offset: 3px;
}

/* 链接基础 */
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

/* 按钮基础 */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器定义 */
.container {
  width: 100%;
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.container-narrow {
  max-width: 860px;
}

/* ==================================================
   Header 导航栏 (70~76px, 磨砂白底, 斜短线当前态)
   ================================================== */
.site-header {
  height: 74px;
  background-color: rgba(247, 248, 245, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 999;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-svg {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: block;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.brand-subtext {
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* 导航链接 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  padding: 6px 0;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--bay-blue);
}

.nav-link.active {
  color: var(--navy);
  font-weight: 650;
}

/* 斜向短线当前态 (14px~20px 斜线，严禁Pill) */
.nav-link.active::after,
.nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 18px;
  height: 2.5px;
  background-color: var(--coral);
  transform: skewX(-28deg);
  border-radius: 1px;
}

/* 头部CTA */
.header-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--coral);
  color: #FFFFFF;
  padding: 9px 18px;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.header-cta-btn:hover {
  background-color: #B54F3B;
  color: #FFFFFF;
}

.header-cta-btn:hover .cta-arrow {
  transform: translateX(3px);
}

.cta-arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.mobile-menu-toggle:hover {
  background-color: var(--canvas);
}

/* 移动端弹出抽屉 */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 74px;
  left: 0;
  width: 100%;
  background-color: rgba(247, 248, 245, 0.98);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 24px 28px 32px;
  flex-direction: column;
  gap: 16px;
  z-index: 998;
  box-shadow: var(--shadow-subtle);
}

.mobile-drawer.open {
  display: flex;
}

.mobile-drawer .nav-link {
  font-size: 16.5px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(215, 223, 225, 0.45);
}

/* ==================================================
   风帆切面公用样式与张力几何
   ================================================== */
.facet-plane {
  position: relative;
  background-color: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

/* 切面斜边修饰类 (不规则张力切边) */
.facet-clip-primary {
  clip-path: polygon(0% 0%, 100% 0%, 97% 100%, 0% 98%);
}

.facet-clip-slant-right {
  clip-path: polygon(0% 0%, 96% 2%, 100% 98%, 3% 100%);
}

.facet-clip-wedge {
  clip-path: polygon(0% 0%, 100% 3%, 98% 97%, 2% 100%);
}

.badge-brass {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--brass);
  background-color: var(--brass-soft);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
}

.badge-coral {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #FFFFFF;
  background-color: var(--coral);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}

.badge-navy {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--navy);
  background-color: var(--bay-soft);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
}

/* 斜向短线装饰 */
.slant-accent-line {
  display: inline-block;
  width: 22px;
  height: 3px;
  background-color: var(--coral);
  transform: skewX(-30deg);
  margin-right: 8px;
}

/* Section 通用结构 */
.site-section {
  padding: 96px 0;
  position: relative;
}

.site-section.section-canvas {
  background-color: #F4F1E8;
}

.site-section.section-subtle {
  background-color: #F2F5F3;
}

.section-header-block {
  margin-bottom: 52px;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--bay-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-h2 {
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 680;
  color: var(--navy);
  line-height: 1.32;
  max-width: 960px;
  margin-bottom: 16px;
}

.section-direct-answer {
  font-size: 18px;
  color: var(--body);
  line-height: var(--lh-body);
  max-width: 860px;
}

/* ==================================================
   Hero: 风帆切面封面 (700~820px, 3~5块几何切面组合)
   ================================================== */
.hero-sail-wrapper {
  position: relative;
  min-height: 760px;
  padding: 60px 0 80px;
  background: var(--bg);
  overflow: hidden;
  display: flex;
  align-items: center;
}

/* 背景隐约切面大字水印 */
.hero-watermark {
  position: absolute;
  top: 18px;
  right: 4%;
  font-size: clamp(80px, 12vw, 140px);
  font-weight: 800;
  color: rgba(25, 63, 89, 0.035);
  user-select: none;
  pointer-events: none;
  line-height: 1;
  letter-spacing: -0.04em;
}

/* 切面网格整体架构 (非对称、非卡片) */
.hero-facet-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr;
  grid-template-rows: auto auto;
  gap: 28px;
  align-items: stretch;
  position: relative;
  z-index: 2;
}

/* 切面A: 主文案大帆面 (白色/帆布白，含H1与CTA) */
.facet-a-main {
  grid-column: 1 / 2;
  grid-row: 1 / 3;
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 56px 52px;
  position: relative;
  clip-path: polygon(0% 0%, 100% 0%, 98.5% 99%, 0% 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.facet-a-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.brand-kicker {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.06em;
}

.hero-main-lead {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 650;
  color: var(--navy);
  line-height: 1.38;
  margin-bottom: 22px;
  white-space: pre-line;
  border-left: 3px solid var(--coral);
  padding-left: 18px;
}

.hero-h1 {
  font-size: clamp(34px, 3.8vw, 48px);
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.hero-body-text {
  font-size: 18px;
  color: var(--body);
  line-height: 1.82;
  margin-bottom: 38px;
  max-width: 620px;
}

/* 主切面底部嵌入式CTA群组 (避免SaaS悬浮卡) */
.hero-cta-integrated {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
}

.btn-primary-coral {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--coral);
  color: #FFFFFF;
  font-size: 16.5px;
  font-weight: 650;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(201, 95, 74, 0.18);
  transition: all 0.2s ease;
}

.btn-primary-coral:hover {
  background-color: #B24E3A;
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-primary-coral:hover .cta-arrow {
  transform: translateX(4px);
}

.btn-secondary-facet {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--canvas);
  color: var(--navy);
  font-size: 15.5px;
  font-weight: 600;
  padding: 12px 22px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.btn-secondary-facet:hover {
  background-color: var(--canvas-dark);
}

.link-review-text {
  font-size: 15px;
  color: var(--bay-blue);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.link-review-text:hover {
  color: var(--navy);
  text-decoration: underline;
}

/* 切面B & C: 右侧上半部双切面 (AI与开发 + 视频与娱乐) */
.hero-facet-column-right {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

/* 切面B: AI与开发 (浅海蓝底色，微斜) */
.facet-b-ai {
  background-color: var(--bay-soft);
  border: 1px solid var(--border);
  padding: 34px 28px;
  clip-path: polygon(0% 0%, 100% 2%, 97% 99%, 3% 97%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.facet-heading {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.facet-tags-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.facet-tag {
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--navy);
  padding: 3px 8px;
  border-radius: 2px;
  font-weight: 500;
}

.facet-summary-text {
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.65;
}

/* 切面C: 视频与娱乐 (帆布白底色) */
.facet-c-video {
  background-color: var(--canvas);
  border: 1px solid var(--border);
  padding: 34px 28px;
  clip-path: polygon(2% 1%, 100% 0%, 98% 98%, 0% 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* 切面D & E: 右侧下半部双切面 (多设备 + 流量规划) */
.hero-facet-row-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

/* 切面D: 多设备 */
.facet-d-devices {
  background-color: #FFFFFF;
  border: 1px solid var(--border);
  padding: 34px 28px;
  clip-path: polygon(0% 0%, 98% 3%, 100% 98%, 2% 99%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* 切面E: 流量规划 */
.facet-e-plans {
  background-color: var(--bay-soft);
  border: 1px solid var(--border);
  padding: 34px 28px;
  clip-path: polygon(3% 0%, 100% 0%, 97% 100%, 0% 97%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.traffic-highlight-nums {
  display: flex;
  gap: 8px;
  font-weight: 700;
  color: var(--navy);
  font-size: 15px;
  margin-bottom: 14px;
}

.traffic-highlight-nums span {
  background: #FFFFFF;
  padding: 2px 7px;
  border-radius: 2px;
  border: 1px solid var(--border);
}

/* 微动切面动画 (10~18秒微偏移，2~5px) */
@keyframes sailSubtleFloat {
  0% { transform: translate(0, 0); }
  50% { transform: translate(2px, -3px); }
  100% { transform: translate(0, 0); }
}

@keyframes sailSubtleFloatReverse {
  0% { transform: translate(0, 0); }
  50% { transform: translate(-3px, 2px); }
  100% { transform: translate(0, 0); }
}

.facet-float-a {
  animation: sailSubtleFloat 14s ease-in-out infinite;
}

.facet-float-b {
  animation: sailSubtleFloatReverse 16s ease-in-out infinite;
}

/* ==================================================
   Section 01: 你主要拿来做什么？(4块不同方向的帆面内容)
   ================================================== */
.facet-four-wings {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.wing-facet {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 380px;
  position: relative;
}

/* AI帆面: 偏竖 */
.wing-ai {
  clip-path: polygon(0% 0%, 100% 2%, 97% 100%, 0% 98%);
  border-top: 3px solid var(--bay-blue);
}

/* 视频帆面: 偏横，帆布白底 */
.wing-video {
  background: var(--canvas);
  clip-path: polygon(2% 0%, 100% 0%, 98% 97%, 0% 100%);
  border-top: 3px solid var(--navy);
}

/* 办公帆面: 较大留白 */
.wing-work {
  background: #FFFFFF;
  clip-path: polygon(0% 1%, 98% 0%, 100% 100%, 2% 98%);
  border-top: 3px solid var(--brass);
}

/* 多设备帆面: 靠页面边缘 */
.wing-multi {
  background: var(--bay-soft);
  clip-path: polygon(0% 0%, 97% 2%, 100% 98%, 3% 100%);
  border-top: 3px solid var(--bay-mid);
}

.wing-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 12px;
  font-feature-settings: "tnum";
}

.wing-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}

.wing-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.wing-list li {
  font-size: 13.5px;
  background: rgba(255, 255, 255, 0.85);
  padding: 3px 9px;
  border-radius: 2px;
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 500;
}

.wing-desc {
  font-size: 15.5px;
  color: var(--body);
  line-height: 1.7;
}

/* ==================================================
   Section 02: AI工具应该关注什么？(大型白色帆面 + 3窄侧栏)
   ================================================== */
.ai-section-layout {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 36px;
  align-items: start;
}

.ai-main-facet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 48px 44px;
  clip-path: polygon(0% 0%, 100% 1%, 98% 100%, 0% 99%);
}

.ai-main-facet h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}

.ai-main-facet p {
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--body);
  margin-bottom: 22px;
}

.ai-notice-box {
  background: var(--coral-soft);
  border-left: 3px solid var(--coral);
  padding: 18px 22px;
  margin-top: 26px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.ai-notice-box p {
  margin-bottom: 0;
  font-size: 14.5px;
  color: #8C3927;
  line-height: 1.65;
}

/* 3个窄侧栏 + 文字索引 */
.ai-side-stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.ai-side-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 24px 26px;
  position: relative;
  clip-path: polygon(0% 0%, 99% 1%, 97% 99%, 1% 100%);
}

.ai-side-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ai-side-card p {
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.68;
}

.ai-side-card .focus-points {
  margin-top: 10px;
  font-size: 13px;
  color: var(--bay-blue);
  font-weight: 600;
}

.ai-text-index-strip {
  background: var(--canvas);
  border: 1px solid var(--border);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
}

.ai-text-index-strip h5 {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.ai-text-index-strip ul {
  list-style: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--body);
}

/* ==================================================
   Section 03: 视频与流媒体 (横向展开宽帆面，杂志式排版)
   ================================================== */
.streaming-wide-facet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 52px 48px;
  clip-path: polygon(0% 0%, 100% 0.5%, 99% 100%, 1% 99.5%);
}

.streaming-columns-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stream-col {
  padding-right: 14px;
  border-right: 1px solid rgba(215, 223, 225, 0.6);
}

.stream-col:last-child {
  border-right: none;
  padding-right: 0;
}

.stream-col h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.stream-col .factors {
  font-size: 12.5px;
  color: var(--coral);
  font-weight: 600;
  margin-bottom: 10px;
}

.stream-col p {
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--body);
}

/* ==================================================
   Section 04: 日常办公流量 (大留白，对角张力大斜面)
   ================================================== */
.daily-work-facet {
  background: var(--canvas);
  border: 1px solid var(--border);
  padding: 56px 52px;
  position: relative;
  clip-path: polygon(0% 1%, 98.5% 0%, 100% 99%, 1.5% 100%);
}

.daily-work-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.work-actions-block h4 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 18px;
}

.work-item-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.work-item-pill {
  font-size: 14px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
}

.work-planning-block {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 36px 32px;
  clip-path: polygon(2% 0%, 100% 2%, 98% 100%, 0% 98%);
}

.work-planning-block h4 {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 14px;
}

.work-planning-block p {
  font-size: 15px;
  color: var(--body);
  line-height: 1.75;
  margin-bottom: 14px;
}

/* ==================================================
   Section 05: 多设备规划 (4个不同宽度的文字切面)
   ================================================== */
.devices-staggered-strip {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr 1.05fr 0.85fr;
  gap: 22px;
}

.device-facet-band {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.device-facet-band:nth-child(1) {
  clip-path: polygon(0% 0%, 100% 2%, 98% 100%, 2% 99%);
  border-top: 3px solid var(--navy);
}

.device-facet-band:nth-child(2) {
  clip-path: polygon(2% 0%, 98% 0%, 100% 100%, 0% 98%);
  background: var(--canvas);
  border-top: 3px solid var(--bay-blue);
}

.device-facet-band:nth-child(3) {
  clip-path: polygon(0% 2%, 100% 0%, 97% 99%, 3% 100%);
  border-top: 3px solid var(--bay-mid);
}

.device-facet-band:nth-child(4) {
  clip-path: polygon(3% 0%, 97% 1%, 100% 98%, 0% 100%);
  background: var(--bay-soft);
  border-top: 3px solid var(--brass);
}

.device-band-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 14px;
}

.device-band-checklist {
  list-style: none;
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.75;
}

.device-band-checklist li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 14px;
}

.device-band-checklist li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--bay-blue);
}

/* ==================================================
   Section 06: 风向流量带 (80 / 180 / 350 / 700GB)
   ================================================== */
.traffic-compass-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.traffic-wind-facet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 38px 30px;
  position: relative;
  transition: transform 0.2s ease;
}

.traffic-wind-facet:hover {
  transform: translateY(-3px);
}

/* 四个斜向角度各不相同 */
.traffic-wind-facet:nth-child(1) {
  clip-path: polygon(0% 0%, 98% 2%, 100% 98%, 2% 100%);
  background: var(--canvas);
}

.traffic-wind-facet:nth-child(2) {
  clip-path: polygon(2% 1%, 100% 0%, 97% 99%, 0% 98%);
  background: #FFFFFF;
}

.traffic-wind-facet:nth-child(3) {
  clip-path: polygon(0% 0%, 100% 3%, 98% 97%, 1% 100%);
  background: var(--bay-soft);
  border: 1.5px solid var(--bay-mid);
}

.traffic-wind-facet:nth-child(4) {
  clip-path: polygon(3% 0%, 97% 0%, 100% 100%, 0% 97%);
  background: #FFFFFF;
}

.traffic-big-number {
  font-size: 38px;
  font-weight: 750;
  color: var(--navy);
  margin-bottom: 12px;
  line-height: 1;
  font-feature-settings: "tnum";
}

.traffic-target-use {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.traffic-desc-text {
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.7;
}

/* ==================================================
   Section 07: 节点地区知识 (4条不同长度地区切面)
   ================================================== */
.region-facet-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.region-facet-row {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 28px 36px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  align-items: center;
  position: relative;
}

/* 四行宽度微差与斜切张力 */
.region-facet-row:nth-child(1) {
  clip-path: polygon(0% 0%, 99.5% 1%, 100% 100%, 0.5% 99%);
  width: 98%;
}

.region-facet-row:nth-child(2) {
  clip-path: polygon(0.5% 0%, 100% 0%, 99.2% 100%, 0% 98.5%);
  width: 100%;
}

.region-facet-row:nth-child(3) {
  clip-path: polygon(0% 1.5%, 98.8% 0%, 100% 100%, 1% 99%);
  width: 96%;
}

.region-facet-row:nth-child(4) {
  clip-path: polygon(1% 0%, 100% 1%, 98.5% 99%, 0% 100%);
  width: 99%;
}

.region-name-badge {
  font-size: 20px;
  font-weight: 750;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

.region-detail-p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.72;
}

/* ==================================================
   Section 08: 线路知识与HTML线路表
   ================================================== */
.network-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin-top: 36px;
}

.network-lines-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: #FFFFFF;
  border: 1px solid var(--border);
}

.network-lines-table th {
  background-color: var(--navy);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 650;
  padding: 16px 20px;
  border: none;
  letter-spacing: 0.02em;
}

.network-lines-table td {
  padding: 18px 20px;
  font-size: 15px;
  line-height: 1.68;
  color: var(--body);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.network-lines-table tr:hover td {
  background-color: rgba(228, 240, 244, 0.35);
}

.network-lines-table .line-type-bold {
  font-weight: 700;
  color: var(--navy);
  font-size: 16px;
  white-space: nowrap;
}

/* ==================================================
   Section 09: 风帆价阶套餐 (5档布局：轻量偏左、主力居中偏右突出)
   ================================================== */
/* TODO：获取真实杨帆云套餐后替换 */
.pricing-facet-stage {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
  margin-top: 40px;
  position: relative;
}

.price-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 38px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 48px rgba(23, 36, 45, 0.08);
}

/* 档位1: 轻量方案 (80GB ¥9.9/月) 偏左 */
.price-card-tier1 {
  grid-column: 1 / 4;
  background: var(--canvas);
  clip-path: polygon(0% 0%, 98% 2%, 100% 98%, 2% 100%);
}

/* 档位2: 日常方案 (180GB ¥19.9/月) 稍向右 */
.price-card-tier2 {
  grid-column: 4 / 7;
  background: #FFFFFF;
  clip-path: polygon(2% 0%, 100% 1%, 97% 100%, 0% 98%);
}

/* 档位3: 主力方案 (350GB ¥29.9/月) 中心偏右，唯一主力推荐，浅海蓝底 */
.price-card-tier3 {
  grid-column: 7 / 10;
  background: var(--bay-soft);
  border: 2px solid var(--bay-blue);
  clip-path: polygon(0% 0%, 100% 2.5%, 98% 98%, 1% 100%);
  transform: scale(1.02);
  z-index: 3;
}

/* 档位4: 高频方案 (700GB ¥49.9/月) 更右 */
.price-card-tier4 {
  grid-column: 10 / 13;
  background: #FFFFFF;
  clip-path: polygon(2% 2%, 98% 0%, 100% 100%, 0% 98%);
}

/* 档位5: 长期方案 (200GB ¥199/年) 独立宽横切面位于下方 */
.price-card-tier5 {
  grid-column: 2 / 12;
  margin-top: 14px;
  background: var(--brass-soft);
  border: 1px solid var(--brass);
  clip-path: polygon(0% 1%, 99% 0%, 100% 99%, 1% 100%);
  flex-direction: row;
  align-items: center;
  padding: 28px 40px;
}

.price-card-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.price-card-name {
  font-size: 22px;
  font-weight: 750;
  color: var(--navy);
  margin-bottom: 6px;
}

.price-card-traffic {
  font-size: 16px;
  color: var(--bay-blue);
  font-weight: 650;
  margin-bottom: 18px;
}

.price-card-amount {
  font-size: 38px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  margin-bottom: 18px;
}

.price-card-amount small {
  font-size: 16px;
  font-weight: 500;
  color: var(--body);
}

.price-card-scenarios {
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 24px;
}

.price-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 11px 18px;
  font-size: 15px;
  font-weight: 650;
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  color: var(--navy);
  border: 1px solid var(--border-dark);
  transition: all 0.2s ease;
}

.price-cta-btn:hover {
  background: var(--navy);
  color: #FFFFFF;
}

.price-cta-primary {
  background: var(--coral);
  color: #FFFFFF;
  border-color: var(--coral);
}

.price-cta-primary:hover {
  background: #B24E3A;
  color: #FFFFFF;
}

/* ==================================================
   Section 10: 杨帆云场景型深度评测
   ================================================== */
.review-facet-wrapper {
  display: grid;
  grid-template-columns: 1.3fr 0.85fr;
  gap: 36px;
  align-items: start;
}

.review-big-facet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 52px 46px;
  clip-path: polygon(0% 0%, 100% 1%, 98.5% 100%, 0.5% 99%);
}

.review-fast-conclusion {
  background: var(--bay-soft);
  border-left: 4px solid var(--navy);
  padding: 22px 26px;
  margin-bottom: 30px;
  clip-path: polygon(0% 0%, 100% 0%, 98% 100%, 0% 100%);
}

.review-fast-conclusion p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--navy);
  font-weight: 550;
  margin: 0;
}

.review-side-indices {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-index-strip {
  background: var(--canvas);
  border: 1px solid var(--border);
  padding: 22px 24px;
  border-radius: var(--radius-sm);
}

.review-index-strip h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.review-index-strip p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.65;
  margin: 0;
}

/* ==================================================
   Section 11: 客户端与设备 (4个不同宽度的纵向文字带)
   ================================================== */
.clients-strip-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr 1.05fr 0.85fr;
  gap: 20px;
}

.client-system-band {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 34px 26px;
  clip-path: polygon(0% 0%, 98% 1.5%, 100% 98.5%, 1% 100%);
}

.client-system-band h4 {
  font-size: 20px;
  font-weight: 750;
  color: var(--navy);
  margin-bottom: 14px;
}

.client-system-band ul {
  list-style: none;
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.75;
}

.client-system-band li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 12px;
}

.client-system-band li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--bay-blue);
}

/* ==================================================
   Section 12: 常见问题快速判断 (逻辑排查步序)
   ================================================== */
.triage-step-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.triage-facet-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 32px 28px;
  clip-path: polygon(0% 0%, 99% 1%, 97% 99%, 1% 100%);
}

.triage-step-num {
  font-size: 14px;
  font-weight: 750;
  color: var(--coral);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.triage-card-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.triage-card-text {
  font-size: 15px;
  color: var(--body);
  line-height: 1.72;
}

/* ==================================================
   Section 13: 推荐文章中心 (风帆编辑目录，5个分组)
   ================================================== */
.editorial-catalog-group {
  margin-bottom: 48px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 40px 38px;
  clip-path: polygon(0% 0%, 100% 0.5%, 99% 100%, 0.5% 99.5%);
}

.catalog-group-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.catalog-group-title {
  font-size: 24px;
  font-weight: 750;
  color: var(--navy);
}

.catalog-group-slash {
  width: 24px;
  height: 3px;
  background-color: var(--bay-blue);
  transform: skewX(-32deg);
}

.catalog-article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.catalog-article-item {
  display: grid;
  grid-template-columns: 140px 1.4fr 1.6fr 100px;
  gap: 20px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(215, 223, 225, 0.45);
}

.catalog-article-item:last-child {
  border-bottom: none;
}

.catalog-cat-badge {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--bay-blue);
}

.catalog-item-title {
  font-size: 16.5px;
  font-weight: 650;
  color: var(--navy);
}

.catalog-item-title:hover {
  color: var(--coral);
}

.catalog-item-answer {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
}

.catalog-item-readlink {
  font-size: 14px;
  font-weight: 600;
  color: var(--coral);
  text-align: right;
}

/* ==================================================
   Section 14: 常见问题 (大型编号 01, 02... 纯HTML可见)
   ================================================== */
.faq-facet-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.faq-facet-item {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 28px 34px;
  position: relative;
  clip-path: polygon(0% 0%, 100% 0.5%, 99.5% 100%, 0% 99.5%);
}

.faq-item-header {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 12px;
}

.faq-num {
  font-size: 20px;
  font-weight: 750;
  color: var(--bay-blue);
  font-feature-settings: "tnum";
}

.faq-question-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
}

.faq-answer-block {
  padding-left: 44px;
  font-size: 16px;
  color: var(--body);
  line-height: 1.8;
}

/* ==================================================
   Footer: 深海蓝决策目录Footer (#193F59, 高度约260~320px)
   ================================================== */
.site-footer {
  background-color: var(--navy);
  color: #F7FAFB;
  padding: 72px 0 36px;
  position: relative;
  overflow: hidden;
}

/* 背景淡大斜面修饰 (opacity 0.03~0.06) */
.site-footer::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -5%;
  width: 600px;
  height: 500px;
  background: rgba(255, 255, 255, 0.04);
  transform: skewX(-25deg);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  bottom: -15%;
  left: -5%;
  width: 480px;
  height: 400px;
  background: rgba(57, 119, 151, 0.05);
  transform: skewX(20deg);
  pointer-events: none;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 36px;
  position: relative;
  z-index: 2;
  margin-bottom: 48px;
}

.footer-brand-title {
  font-size: 22px;
  font-weight: 750;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.footer-brand-sub {
  font-size: 13.5px;
  color: #C5D6DE;
  line-height: 1.6;
  margin-bottom: 20px;
}

.footer-col-title {
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 18px;
  border-bottom: 1.5px solid rgba(197, 214, 222, 0.25);
  padding-bottom: 8px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  font-size: 14.5px;
  color: #C5D6DE;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

/* 友情链接专用区域 (每个链接仅出现一次，target="_blank"，严禁nofollow) */
.footer-friendly-links {
  position: relative;
  z-index: 2;
  padding: 22px 0;
  border-top: 1px solid rgba(215, 223, 225, 0.15);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}

.friendly-label {
  font-size: 13.5px;
  font-weight: 650;
  color: #9AB7C7;
}

.friendly-link {
  font-size: 13.5px;
  color: #C5D6DE;
  transition: color 0.2s ease;
}

.friendly-link:hover {
  color: #FFFFFF;
}

/* 版权与商业CTA */
.footer-bottom-row {
  position: relative;
  z-index: 2;
  padding-top: 24px;
  border-top: 1px solid rgba(215, 223, 225, 0.12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 13.5px;
  color: #9AB7C7;
}

.footer-cta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--coral);
  color: #FFFFFF;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 650;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.footer-cta-pill:hover {
  background-color: #B54F3B;
  color: #FFFFFF;
}

/* ==================================================
   文章页面排版 (Article Layout)
   ================================================== */
.article-page-wrap {
  padding: 56px 0 96px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 24px;
}

.breadcrumb-nav a {
  color: var(--bay-blue);
}

.breadcrumb-nav a:hover {
  text-decoration: underline;
}

.article-header-facet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 48px 44px;
  margin-bottom: 36px;
  clip-path: polygon(0% 0%, 100% 0.8%, 98.5% 100%, 0% 99.5%);
}

.article-category-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--bay-blue);
  background: var(--bay-soft);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.article-h1 {
  font-size: clamp(32px, 3.8vw, 46px);
  font-weight: 720;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 13.5px;
  color: var(--muted);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 26px;
}

/* 快速结论面: #E4F0F4, 3px深海蓝，右下小斜切角 */
.fast-conclusion-box {
  background-color: var(--bay-soft);
  border-left: 3.5px solid var(--navy);
  padding: 24px 28px;
  margin: 32px 0;
  clip-path: polygon(0% 0%, 100% 0%, 98% 100%, 0% 100%);
}

.fast-conclusion-title {
  font-size: 16px;
  font-weight: 750;
  color: var(--navy);
  margin-bottom: 8px;
}

.fast-conclusion-text {
  font-size: 16.5px;
  color: var(--text);
  line-height: 1.82;
  margin: 0;
}

.article-content-body {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 56px 52px;
  max-width: 860px;
  margin: 0 auto;
}

.article-content-body h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 680;
  color: var(--navy);
  line-height: 1.35;
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.article-content-body h3 {
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 650;
  color: var(--navy);
  margin-top: 32px;
  margin-bottom: 14px;
}

.article-content-body p {
  font-size: 17.5px;
  line-height: 1.84;
  color: var(--body);
  margin-bottom: 24px;
}

.article-content-body ul, 
.article-content-body ol {
  margin-bottom: 26px;
  padding-left: 24px;
  font-size: 17px;
  line-height: 1.82;
  color: var(--body);
}

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

/* 相关阅读区域 */
.article-related-box {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 2px solid var(--border);
}

.article-related-title {
  font-size: 20px;
  font-weight: 750;
  color: var(--navy);
  margin-bottom: 18px;
}

.related-links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.related-link-card {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.related-link-card:hover {
  background: var(--canvas);
}

.related-card-cat {
  font-size: 12px;
  color: var(--bay-blue);
  font-weight: 600;
  margin-bottom: 4px;
}

.related-card-title {
  font-size: 15px;
  font-weight: 650;
  color: var(--navy);
}

/* ==================================================
   分类页专用排版 (Category Layout)
   ================================================== */
.category-hero-facet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 56px 52px;
  margin-bottom: 48px;
  clip-path: polygon(0% 0%, 100% 1.2%, 98.5% 99%, 0% 100%);
}

.category-h1 {
  font-size: clamp(34px, 4vw, 46px);
  font-weight: 720;
  color: var(--navy);
  margin-bottom: 18px;
}

.category-intro-text {
  font-size: 18px;
  color: var(--body);
  line-height: 1.82;
  max-width: 820px;
}

.category-articles-grid {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.category-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 32px 36px;
  clip-path: polygon(0% 0%, 100% 0.5%, 99% 100%, 0.5% 99.5%);
  transition: transform 0.2s ease;
}

.category-card:hover {
  transform: translateY(-2px);
}

.cat-card-meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}

.cat-card-title {
  font-size: 21px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.cat-card-title a:hover {
  color: var(--coral);
}

.cat-card-answer {
  font-size: 15.5px;
  color: var(--body);
  line-height: 1.72;
  margin-bottom: 16px;
}

.cat-card-link {
  font-size: 14.5px;
  font-weight: 650;
  color: var(--coral);
}

/* ==================================================
   响应式断点适配 (Responsive Checks: 1024, 768, 430, 390, 375)
   ================================================== */

@media (max-width: 1100px) {
  .site-nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: flex;
  }
  .hero-facet-grid {
    grid-template-columns: 1fr;
  }
  .facet-a-main {
    clip-path: none;
  }
  .pricing-facet-stage {
    grid-template-columns: repeat(2, 1fr);
  }
  .price-card-tier1, .price-card-tier2, .price-card-tier3, .price-card-tier4 {
    grid-column: span 1;
    transform: none !important;
  }
  .price-card-tier5 {
    grid-column: span 2;
  }
  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .streaming-columns-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .devices-staggered-strip,
  .clients-strip-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 16px;
  }
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .site-section {
    padding: 64px 0;
  }
  .hero-sail-wrapper {
    min-height: auto;
    padding: 40px 0 60px;
  }
  /* 移动端Hero重新编排：垂直流，交错斜边内容带 */
  .hero-facet-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .facet-a-main,
  .facet-b-ai,
  .facet-c-video,
  .facet-d-devices,
  .facet-e-plans {
    clip-path: none !important;
    padding: 32px 24px;
  }
  .hero-facet-column-right,
  .hero-facet-row-bottom {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .facet-four-wings {
    grid-template-columns: 1fr;
  }
  .wing-facet {
    clip-path: none !important;
    min-height: auto;
    padding: 28px 22px;
  }
  .ai-section-layout,
  .review-facet-wrapper,
  .daily-work-grid {
    grid-template-columns: 1fr;
  }
  .streaming-columns-grid {
    grid-template-columns: 1fr;
  }
  .devices-staggered-strip,
  .clients-strip-grid,
  .traffic-compass-band,
  .triage-step-container {
    grid-template-columns: 1fr;
  }
  .traffic-wind-facet,
  .device-facet-band,
  .client-system-band,
  .triage-facet-card {
    clip-path: none !important;
  }
  .region-facet-row {
    grid-template-columns: 1fr;
    gap: 12px;
    width: 100% !important;
    clip-path: none !important;
    padding: 22px 20px;
  }
  .pricing-facet-stage {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .price-card-tier5 {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
  }
  .network-table-wrap {
    overflow-x: auto;
  }
  .catalog-article-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .catalog-item-readlink {
    text-align: left;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .related-links-grid {
    grid-template-columns: 1fr;
  }
  .article-content-body {
    padding: 32px 20px;
  }
}

/* 针对小屏手机 (430px, 390px, 375px) 细节严密保证无横向滚动 */
@media (max-width: 480px) {
  .hero-cta-integrated {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta-integrated .btn-primary-coral,
  .hero-cta-integrated .btn-secondary-facet {
    justify-content: center;
    width: 100%;
  }
  .faq-item-header {
    flex-direction: column;
    gap: 6px;
  }
  .faq-answer-block {
    padding-left: 0;
  }
  /* 表格在极窄手机上以块状呈现，避免横向挤出 */
  .network-lines-table, 
  .network-lines-table thead, 
  .network-lines-table tbody, 
  .network-lines-table th, 
  .network-lines-table td, 
  .network-lines-table tr {
    display: block;
  }
  .network-lines-table thead tr {
    position: absolute;
    top: -9999px;
    left: -9999px;
  }
  .network-lines-table tr {
    border: 1px solid var(--border);
    margin-bottom: 18px;
    background: #FFFFFF;
  }
  .network-lines-table td {
    border: none;
    border-bottom: 1px solid rgba(215, 223, 225, 0.4);
    position: relative;
    padding: 12px 16px;
  }
  .network-lines-table td:last-child {
    border-bottom: none;
  }
  .network-lines-table td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--navy);
    display: block;
    font-size: 13px;
    margin-bottom: 4px;
  }
}

/* 减弱动作辅助模式 (prefers-reduced-motion) */
@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;
  }
  .facet-float-a,
  .facet-float-b {
    animation: none !important;
  }
}