@charset "UTF-8";
/* =============================================================================
   九方创想云科技有限公司 — common.css
   全站基础样式与通用组件（纯静态，无构建依赖）
   -----------------------------------------------------------------------------
   目录
   01 设计令牌 Design Tokens
   02 重置与基础排版
   03 布局工具
   04 按钮与链接
   05 站点头部与导航
   06 站点底部
   07 通用内容组件
   08 交互组件（Tabs / Accordion / FAQ / 筛选 / 表单）
   09 动效与滚动揭示
   10 浮动控件（返回顶部 / 移动端底部 CTA）
   11 响应式断点
   ========================================================================== */

/* =============================================================================
   01 设计令牌 Design Tokens
   ========================================================================== */
:root {
  /* 背景层次：深色科技感，保持大面积留白与克制对比 */
  --bg: #000000;
  --bg-soft: #0a0a0a;
  --surface: #0f0f0f;
  --surface-2: #141414;
  --surface-3: #1a1a1a;

  /* 描边与分隔 */
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-soft: rgba(255, 255, 255, 0.045);

  /* 文本
     三级灰阶均需通过 WCAG AA（对照纯黑底 ≥ 4.5:1），同时保持层次可分辨：
     text-2 8.75:1 / text-3 6.10:1 / text-4 4.64:1 */
  --text: #f2f5f8;
  --text-2: rgba(226, 233, 242, 0.72);
  --text-3: rgba(200, 210, 224, 0.66);
  --text-4: rgba(180, 192, 208, 0.62);

  /* 品牌强调：科技蓝 → 紫 → 青，仅用于关键节点 */
  --brand: #ffffff;
  --brand-2: #c8c8c8;
  --brand-3: #9a9a9a;
  --brand-soft: rgba(255, 255, 255, 0.12);
  --grad-brand: linear-gradient(120deg, #ffffff 0%, #c8c8c8 52%, #9a9a9a 100%);
  --grad-line: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0));
  --grad-surface: linear-gradient(160deg, rgba(255, 255, 255, 0.045) 0%, rgba(255, 255, 255, 0.012) 40%, rgba(255, 255, 255, 0) 100%);

  /* 状态 */
  --ok: #37c88a;
  --warn: #e0a63c;
  --pending: #9aa8bb;

  /* 尺寸与节奏 */
  --wrap: 1200px;
  --wrap-narrow: 860px;
  --gutter: 24px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --section-y: clamp(72px, 8.5vw, 132px);
  --header-h: 72px;

  /* 阴影 */
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 12px 32px -12px rgba(0, 0, 0, 0.7);
  --shadow-3: 0 28px 70px -30px rgba(0, 0, 0, 0.85);

  /* 字体：使用系统字体栈，零外部字体请求，保证首屏与 Core Web Vitals */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", "JetBrains Mono",
    Consolas, "Liberation Mono", monospace;

  /* 过渡 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 0.16s var(--ease);
  --t: 0.28s var(--ease);
  --t-slow: 0.6s var(--ease);
}

/* =============================================================================
   02 重置与基础排版
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 全站底层网格与光晕：精致、微弱，不抢内容 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 0%, transparent 78%);
}

.page {
  position: relative;
  z-index: 1;
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0 0 0.5em;
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -0.015em;
}

/* 避免标题末行只剩一两个字（孤行）；不支持的浏览器按普通换行处理 */
h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  font-size: clamp(30px, 4.4vw, 56px);
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(25px, 3.1vw, 40px);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(18px, 1.7vw, 22px);
}

h4 {
  font-size: 17px;
}

p {
  margin: 0 0 1em;
  color: var(--text-2);
  /* 避免段落末行只剩一个字；不支持的浏览器按普通换行处理 */
  text-wrap: pretty;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--t-fast), opacity var(--t-fast);
}

a:hover {
  color: var(--brand);
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.15em;
  color: var(--text-2);
}

li {
  margin: 0.3em 0;
}

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

strong {
  color: var(--text);
  font-weight: 600;
}

code,
kbd,
.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 40px 0;
}

::selection {
  background: rgba(255, 255, 255, 0.32);
  color: #fff;
}

/* 键盘可达性 */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  background: var(--brand);
  color: #000;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
  color: #000;
}

/* =============================================================================
   03 布局工具
   ========================================================================== */
/* 间距工具类：全站通用，原先仅定义在 index.css 中，
   导致其余 11 个页面引用它们时完全不生效。 */
.mt-sm {
  margin-top: 12px;
}

.mt-md {
  margin-top: 22px;
}

.mt-lg {
  margin-top: 32px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.wrap-narrow {
  max-width: var(--wrap-narrow);
}

.section {
  position: relative;
  padding: var(--section-y) 0;
}

.section--tight {
  padding: calc(var(--section-y) * 0.62) 0;
}

.section--soft {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.016) 0%, rgba(255, 255, 255, 0) 100%);
}

.section--surface {
  background: var(--bg-soft);
}

.section + .section--line {
  border-top: 1px solid var(--line-soft);
}

.sec-head {
  max-width: 760px;
  margin-bottom: clamp(36px, 4.6vw, 64px);
}

.sec-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--grad-line);
}

.sec-head--center .eyebrow::after {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0));
}

.sec-sub {
  margin: 0;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.85;
  color: var(--text-2);
}

.grid {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-2-1 {
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
}

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.stack-sm > * + * {
  margin-top: 12px;
}

.stack > * + * {
  margin-top: 24px;
}

.divider {
  height: 1px;
  background: var(--line-soft);
  border: 0;
  margin: 0;
}

/* =============================================================================
   04 按钮与链接
   ========================================================================== */
.btn {
  --btn-bg: transparent;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--t-fast), border-color var(--t-fast), background var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);
}

.btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.32);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  border-color: transparent;
  background: #ffffff;
  background-size: 160% 100%;
  color: #0a0a0a;
  box-shadow: 0 10px 30px -14px rgba(255, 255, 255, 0.28);
}

.btn-primary:hover {
  color: #0a0a0a;
  background: #dedede;
  box-shadow: 0 14px 36px -14px rgba(255, 255, 255, 0.36);
}

.btn-ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-2);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.btn-link {
  padding: 0;
  border: 0;
  background: none;
  color: var(--brand);
  font-size: 15px;
  font-weight: 500;
}

.btn-link:hover {
  color: var(--brand-3);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 30px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

/* 文字箭头链接 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--brand);
}

.link-arrow svg {
  width: 16px;
  height: 16px;
  transition: transform var(--t-fast);
}

.link-arrow:hover svg {
  transform: translateX(3px);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-2);
}

.link-more:hover {
  color: var(--brand);
}

/* =============================================================================
   05 站点头部与导航
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
}

/* 向下滚动后进入紧凑态：更实的底、更明显的分隔 */
.site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.9);
  border-bottom-color: var(--line);
  box-shadow: 0 12px 32px -24px rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  display: block;
  width: auto;
  height: 30px;
  flex: 0 0 auto;
  object-fit: contain;
  /* 图片左侧自带透明留白，抵消后让可见图形与内容左边界对齐。 */
  transform: scale(1.8) translateX(-9.375px);
  transform-origin: left center;
}

/* 主导航 */
.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  padding: 4px 0;
  font-size: 14.5px;
  color: var(--text-2);
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--grad-line);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 17px;
  height: 1.5px;
  margin: 4px auto;
  background: var(--text);
  transition: transform var(--t), opacity var(--t-fast);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* 移动端抽屉导航 */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  z-index: 99;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: 18px var(--gutter) 28px;
  background: rgba(0, 0, 0, 0.97);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--t), opacity var(--t), visibility var(--t);
}

.mobile-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mobile-nav li + li {
  border-top: 1px solid var(--line-soft);
}

.mobile-nav a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  color: var(--text-2);
}

.mobile-nav a.is-active {
  color: var(--brand);
}

.mobile-nav .btn {
  margin-top: 20px;
}

body.nav-open {
  overflow: hidden;
}

/* 内页页头 */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(56px, 7vw, 96px)) 0 clamp(44px, 5vw, 72px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  top: -40%;
  left: 50%;
  width: min(1000px, 120vw);
  height: 620px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0.07) 42%, transparent 70%);
  pointer-events: none;
}

.page-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  max-width: 900px;
  margin-bottom: 20px;
}

.page-hero .lead {
  max-width: 720px;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--text-2);
}

/* 面包屑 */
.breadcrumb {
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--text-3);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  margin: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-4);
}

.breadcrumb a {
  color: var(--text-3);
}

.breadcrumb a:hover {
  color: var(--brand);
}

.breadcrumb [aria-current="page"] {
  color: var(--text-2);
}

/* 锚点胶囊导航 */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.anchor-nav a {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--text-2);
  background: rgba(255, 255, 255, 0.02);
}

.anchor-nav a:hover {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--text);
}

/* =============================================================================
   06 站点底部
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 1;
  padding-top: clamp(56px, 6vw, 88px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.018) 0%, rgba(0, 0, 0, 0) 60%);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: 36px;
  padding-bottom: 48px;
}

.footer-brand p {
  max-width: 340px;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-3);
}

.footer-col h4 {
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col li {
  margin: 0 0 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-3);
}

.footer-col a:hover {
  color: var(--text);
}

.footer-note {
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-4);
}

.footer-note-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  justify-content: space-between;
}

.footer-note a {
  color: var(--text-4);
}

.footer-note a:hover {
  color: var(--text-2);
}

.footer-pending {
  color: var(--text-3);
}

/* =============================================================================
   07 通用内容组件
   ========================================================================== */
/* 卡片 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  background-image: var(--grad-surface);
  overflow: hidden;
  transition: border-color var(--t), transform var(--t), background-color var(--t);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-3px);
}

.card--flat:hover {
  transform: none;
}

.card--link {
  cursor: pointer;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--brand);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04));
  color: #e0e0e0;
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.card h3,
.card h4 {
  margin-bottom: 10px;
}

.card p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

.card-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-list li {
  margin: 0;
  padding: 4px 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  color: var(--text-3);
  background: rgba(255, 255, 255, 0.02);
}

.card-foot {
  margin-top: auto;
  padding-top: 20px;
}

/* 定义式内容（场景/痛点/方案/技术/价值） */
.def-list {
  margin: 0;
  padding: 0;
}

.def-list dt {
  margin-top: 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--text-4);
}

.def-list dt:first-child {
  margin-top: 0;
}

.def-list dd {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  color: var(--text-3);
  background: rgba(255, 255, 255, 0.02);
}

.tag--brand {
  border-color: rgba(255, 255, 255, 0.4);
  color: #dcdcdc;
  background: var(--brand-soft);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* 统计数字（仅用于站点结构事实，如流程步骤数、能力项数） */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--line-soft);
  overflow: hidden;
}

.stat {
  padding: 26px 24px;
  background: var(--bg-soft);
}

.stat-num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
}

.stat-num .unit {
  font-size: 14px;
  color: var(--brand);
}

.stat-label {
  margin-top: 6px;
  font-size: 13.5px;
  color: var(--text-3);
}

/* 流程步骤 */
.flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  counter-reset: flow;
}

.flow-item {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color var(--t), background var(--t), transform var(--t);
}

.flow-item:hover {
  border-color: rgba(255, 255, 255, 0.42);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.flow-step {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--brand);
}

.flow-item h4 {
  margin: 0 0 6px;
  font-size: 15.5px;
}

.flow-item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-3);
}

/* 横向流程（带连线） */
.process-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  padding-top: 10px;
}

.process-track::before {
  content: "";
  position: absolute;
  top: 34px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--grad-line);
  opacity: 0.55;
}

.process-node {
  position: relative;
  padding-top: 46px;
  text-align: center;
}

.process-node::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 50%;
  width: 12px;
  height: 12px;
  transform: translateX(-50%);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: var(--bg);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08);
}

.process-node h4 {
  margin: 0 0 4px;
  font-size: 15px;
}

.process-node p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-3);
}

/* 能力矩阵 */
.matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.matrix-cell {
  position: relative;
  padding: 20px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.008));
  text-align: center;
  transition: border-color var(--t), transform var(--t);
}

.matrix-cell:hover {
  border-color: rgba(255, 255, 255, 0.45);
  transform: translateY(-2px);
}

.matrix-cell strong {
  display: block;
  font-size: 15px;
}

.matrix-cell span {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-4);
}

.matrix-plus {
  display: none;
}

/* 数据流链条：数据 → 知识 → 模型 → Agent → 应用 → 业务 */
.data-chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03) 45%, rgba(255, 255, 255, 0.05));
}

.data-chain .node {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--line-soft);
  font-size: 14px;
  color: var(--text);
}

.data-chain .arrow {
  flex: 0 0 auto;
  width: 26px;
  height: 8px;
  color: rgba(255, 255, 255, 0.75);
}

/* 表格 */
.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  background: var(--surface);
}

table.table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14.5px;
}

table.table th,
table.table td {
  padding: 16px 20px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-2);
}

table.table thead th {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
  background: rgba(255, 255, 255, 0.022);
  white-space: nowrap;
}

table.table tbody tr:last-child td {
  border-bottom: 0;
}

table.table tbody tr:hover {
  background: rgba(255, 255, 255, 0.014);
}

/* 提示条 */
.notice {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--brand);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.055);
  font-size: 14.5px;
  color: var(--text-2);
}

.notice svg {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  color: var(--brand);
}

/* 【待补充】占位标记：明确呈现为待完善字段，而非编造内容 */
.pending {
  display: inline-block;
  padding: 1px 8px;
  border: 1px dashed rgba(154, 168, 187, 0.5);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--pending);
  background: rgba(154, 168, 187, 0.06);
  white-space: nowrap;
}

.pending-cell {
  color: var(--pending);
}

/* 引用 */
.quote {
  margin: 28px 0;
  padding: 22px 24px;
  border-left: 2px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.018);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-2);
}

/* 政策引用块 */
.doc-ref {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.doc-ref .doc-title {
  font-size: 15px;
  color: var(--text);
}

.doc-ref .doc-no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-4);
}

/* 结尾 CTA 通栏
   原先只定义在 index.css 中，而站内 9 个页面（首页 + 7 个内页 + 关于页）都在用
   这套 markup，导致除首页外的页面 CTA 完全没有样式。 */
.cta-band {
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.02) 46%, rgba(255, 255, 255, 0) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
}

.cta-inner h2 {
  margin-bottom: 10px;
  max-width: 720px;
}

.cta-inner .sec-sub {
  max-width: 620px;
}

/* 图文分栏 */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 60px);
  align-items: center;
}

.split--top {
  align-items: start;
}

/* 团队角色网格 */
.role-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

.role {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color var(--t);
}

.role:hover {
  border-color: rgba(255, 255, 255, 0.4);
}

.role h4 {
  margin: 0 0 8px;
  font-size: 15.5px;
}

.role p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-3);
}

/* 时间线 */
.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.25), transparent);
}

.timeline li {
  position: relative;
  margin: 0 0 26px;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: -26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: var(--bg);
}

.timeline .time {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.timeline h4 {
  margin: 4px 0 6px;
  font-size: 16px;
}

.timeline p {
  margin: 0;
  font-size: 14px;
  color: var(--text-3);
}

/* 端点信息列表 */
.info-list {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--line-soft);
  overflow: hidden;
}

.info-row {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 22px;
  background: var(--surface);
}

.info-row dt {
  font-size: 13.5px;
  color: var(--text-4);
}

.info-row dd {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-2);
}

/* =============================================================================
   08 交互组件
   ========================================================================== */
/* Tabs */
.tabs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.02);
  width: fit-content;
  max-width: 100%;
}

.tabs-btn {
  padding: 9px 20px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text-3);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--t-fast), background var(--t-fast);
}

.tabs-btn:hover {
  color: var(--text);
}

.tabs-btn[aria-selected="true"] {
  color: var(--text);
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0.2));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.07);
}

.tabs-panel {
  display: none;
  margin-top: 28px;
}

.tabs-panel.is-active {
  display: block;
  animation: fade-up 0.36s var(--ease) both;
}

/* Accordion */
.accordion {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
}

.acc-item + .acc-item {
  border-top: 1px solid var(--line-soft);
}

.acc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 20px 24px;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--t-fast);
}

.acc-head:hover {
  background: rgba(255, 255, 255, 0.022);
}

.acc-head .acc-icon {
  flex: 0 0 auto;
  position: relative;
  width: 16px;
  height: 16px;
}

.acc-head .acc-icon::before,
.acc-head .acc-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--brand);
  transform: translate(-50%, -50%);
  transition: transform var(--t), opacity var(--t);
}

.acc-head .acc-icon::before {
  width: 14px;
  height: 1.5px;
}

.acc-head .acc-icon::after {
  width: 1.5px;
  height: 14px;
}

.acc-head[aria-expanded="true"] .acc-icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.acc-body {
  display: none;
  padding: 0 24px 22px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-2);
}

.acc-body p:last-child {
  margin-bottom: 0;
}

/* FAQ：问答对，服务于 SEO / GEO 结构化理解 */
.faq {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--t);
}

.faq-item.is-open {
  border-color: rgba(255, 255, 255, 0.38);
}

.faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 20px 22px;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 15.5px;
  font-weight: 500;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}

.faq-q .q-mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brand);
  padding-top: 4px;
}

.faq-q .q-arrow {
  flex: 0 0 auto;
  margin-left: auto;
  width: 18px;
  height: 18px;
  color: var(--text-3);
  transition: transform var(--t);
}

.faq-item.is-open .q-arrow {
  transform: rotate(180deg);
  color: var(--brand);
}

.faq-a {
  display: none;
  padding: 0 22px 22px 52px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-2);
}

.faq-a p:last-child {
  margin-bottom: 0;
}

/* 筛选栏 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
}

.filter-label {
  margin-right: 4px;
  font-size: 13px;
  color: var(--text-4);
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-3);
  font-size: 13.5px;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.filter-btn.is-active {
  color: #0a0a0a;
  border-color: transparent;
  background: #ffffff;
}

.filter-count {
  margin-left: auto;
  font-size: 13px;
  color: var(--text-4);
}

.filter-empty {
  display: none;
  padding: 46px 24px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: 14.5px;
  color: var(--text-3);
}

.filter-empty.is-visible {
  display: block;
}

/* 案例/文章卡片 */
.item-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--t), transform var(--t);
}

.item-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-3px);
}

.item-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--line-soft);
  background: radial-gradient(120% 120% at 20% 0%, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.07) 45%, rgba(0, 0, 0, 0.9) 100%);
  overflow: hidden;
}

.item-thumb svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.item-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 22px 24px;
}

.item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-4);
}

.item-card h3 {
  margin: 0 0 10px;
  font-size: 17.5px;
}

.item-card h3 a:hover {
  color: var(--brand);
}

.item-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-2);
}

.item-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-4);
}

/* 文章正文 */
.article {
  font-size: 16px;
  line-height: 1.95;
  color: var(--text-2);
}

.article h2 {
  margin: 48px 0 16px;
  font-size: clamp(22px, 2.3vw, 28px);
  color: var(--text);
}

.article h3 {
  margin: 34px 0 12px;
  font-size: 19px;
  color: var(--text);
}

.article ul,
.article ol {
  padding-left: 1.3em;
}

.article li {
  margin: 0.5em 0;
}

.article a {
  color: var(--brand);
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

.article a:hover {
  color: var(--brand-3);
}

.article blockquote {
  margin: 28px 0;
  padding: 4px 0 4px 22px;
  border-left: 2px solid rgba(255, 255, 255, 0.55);
  color: var(--text-2);
}

.article .toc {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.article .toc ol {
  margin: 0;
  padding-left: 1.2em;
}

/* 表单 */
.form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  font-size: 14px;
  color: var(--text-2);
}

.field .req {
  color: var(--brand);
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color var(--t-fast), background var(--t-fast);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--text-4);
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.05);
}

.select {
  appearance: none;
  -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: calc(100% - 20px) 21px, calc(100% - 15px) 21px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 42px;
}

.select option {
  background: var(--surface-2);
  color: var(--text);
}

.textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.75;
}

.field-error {
  display: none;
  font-size: 13px;
  color: #ff8f8f;
}

.field.has-error .input,
.field.has-error .select,
.field.has-error .textarea {
  border-color: rgba(255, 143, 143, 0.6);
}

.field.has-error .field-error {
  display: block;
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-3);
}

.check input {
  margin-top: 4px;
  accent-color: var(--brand);
}

.form-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-4);
}

.form-status {
  display: none;
  padding: 16px 18px;
  border: 1px solid rgba(55, 200, 138, 0.4);
  border-radius: var(--radius);
  background: rgba(55, 200, 138, 0.08);
  font-size: 14.5px;
  color: #a9f0cd;
}

.form-status.is-visible {
  display: block;
}

.form-status.is-error {
  border-color: rgba(255, 143, 143, 0.45);
  background: rgba(255, 143, 143, 0.08);
  color: #ffbcbc;
}

/* =============================================================================
   09 动效与滚动揭示
   ========================================================================== */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes dash-flow {
  to {
    stroke-dashoffset: -240;
  }
}

@keyframes pulse-node {
  0%,
  100% {
    opacity: 0.35;
  }
  50% {
    opacity: 1;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* 仅在启用 JS 时隐藏待揭示内容，避免无 JS 时内容不可见 */
.no-js .reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* =============================================================================
   10 浮动控件
   ========================================================================== */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(20, 20, 20, 0.86);
  color: var(--text-2);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: opacity var(--t), transform var(--t), visibility var(--t), color var(--t-fast);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-to-top:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.55);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
}

/* 阅读进度条（文章页） */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 101;
  height: 2px;
  width: 0;
  background: var(--grad-brand);
  transition: width 0.1s linear;
}

/* =============================================================================
   11 响应式断点
   ========================================================================== */
@media (max-width: 1080px) {
  :root {
    --gutter: 20px;
  }

  .nav {
    gap: 20px;
  }

  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }

  .cta-inner {
    gap: 20px;
  }

  .cta-inner .btn {
    width: 100%;
  }
}

@media (max-width: 960px) {
  .nav {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .header-actions {
    margin-left: auto;
  }

  body.nav-open .site-header {
    background: #000;
    border-bottom-color: var(--line);
  }

  .mobile-nav {
    inset: var(--header-h) 0 0 0;
    max-height: none;
    background: #000;
    padding-bottom: max(28px, env(safe-area-inset-bottom));
  }

  .header-actions .btn {
    display: none;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-2-1 {
    grid-template-columns: minmax(0, 1fr);
  }

  .split {
    grid-template-columns: minmax(0, 1fr);
  }

  .process-track::before {
    display: none;
  }

  .process-node {
    padding-top: 0;
    text-align: left;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 6px 14px;
    align-items: baseline;
  }

  .process-node::before {
    position: static;
    transform: none;
    grid-row: span 2;
    margin-top: 6px;
  }

  .info-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15.5px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .card {
    padding: 24px 20px;
  }

  .faq-a {
    padding-left: 22px;
  }

  .tabs-nav {
    border-radius: var(--radius);
    width: 100%;
  }

  .tabs-btn {
    padding: 9px 14px;
    font-size: 13.5px;
  }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
  }

  .stat-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 打印：保证内容可读、去掉装饰 */
@media print {
  body::before,
  .site-header,
  .mobile-nav,
  .back-to-top,
  .progress-bar {
    display: none !important;
  }

  body {
    background: #fff;
    color: #111;
  }
}