:root {
  --brand: #F97316;
  --brand-dark: #C2410C;
  --brand-soft: #FFF7ED;
  --brand-glow: rgba(249, 115, 22, 0.35);
  --ink: #1F2937;
  --ink-2: #4B5563;
  --muted: #6B7280;
  --bg: #FFFFFF;
  --bg-2: #F9FAFB;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --line: #E5E7EB;
  --ok: #059669;
  --warn: #D97706;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 48px rgba(15, 23, 42, 0.14);
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme="dark"] {
  --brand: #FB923C;
  --brand-dark: #FDBA74;
  --brand-soft: #2A1B10;
  --brand-glow: rgba(251, 146, 60, 0.28);
  --ink: #F3F4F6;
  --ink-2: #D1D5DB;
  --muted: #9CA3AF;
  --bg: #0F1115;
  --bg-2: #161922;
  --bg-glass: rgba(22, 25, 34, 0.72);
  --line: #2A2F3A;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

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

a {
  color: var(--brand-dark);
  text-decoration: none;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover {
  text-decoration: underline;
}

ul,
ol {
  padding-left: 1.4em;
}

::selection {
  background: var(--brand);
  color: #fff;
}

:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 999;
}

.skip-link:focus {
  left: 0;
}

/* ========== 顶部公告 ========== */
.topbar {
  background: linear-gradient(90deg, var(--brand) 0%, #FB923C 50%, #F59E0B 100%);
  color: #fff;
  font-size: 13px;
  position: relative;
  overflow: hidden;
}

.topbar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
  transform: translateX(-100%);
  animation: shimmer 6s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 60% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.topbar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 8px;
  padding-bottom: 8px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.topbar a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ========== 导航 ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.header:hover {
  box-shadow: var(--shadow);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
  flex: 0 0 auto;
}

.logo:hover {
  text-decoration: none;
  color: var(--brand-dark);
}

.logo svg {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  transition: transform 0.4s var(--ease);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.06);
}

.logo small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.5px;
  line-height: 1.4;
}

.menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  padding: 0;
  flex-wrap: wrap;
}

.menu a {
  position: relative;
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.menu a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.menu a:hover {
  background: var(--brand-soft);
  color: var(--brand-dark);
  text-decoration: none;
  transform: translateY(-1px);
}

.menu a:hover::after {
  transform: scaleX(1);
}

.tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.search {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-glow);
}

.search input {
  border: 0;
  outline: 0;
  padding: 8px 10px;
  width: 150px;
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
}

.search input::placeholder {
  color: var(--muted);
}

.search button {
  border: 0;
  background: var(--brand);
  color: #fff;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background-color 0.25s var(--ease);
}

.search button:hover {
  background: var(--brand-dark);
}

.icon-btn {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.icon-btn:hover {
  border-color: var(--brand);
  color: var(--brand-dark);
  transform: translateY(-1px);
}

.icon-btn:active {
  transform: scale(0.94);
}

.burger {
  display: none;
}

/* ========== 面包屑 ========== */
.crumbs {
  font-size: 13px;
  color: var(--muted);
  padding: 14px 0;
}

.crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
}

.crumbs li::after {
  content: "›";
  margin-left: 6px;
  color: var(--muted);
}

.crumbs li:last-child::after {
  content: "";
}

.crumbs a {
  color: var(--muted);
}

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

/* ========== Banner 轮播 ========== */
.banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 45%, #FEF3C7 100%);
  margin: 8px 0 28px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(249, 115, 22, 0.18);
}

html[data-theme="dark"] .banner {
  background: linear-gradient(135deg, #2A1B10 0%, #3B2412 45%, #1F2937 100%);
  border-color: rgba(251, 146, 60, 0.22);
}

.banner::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.22), transparent 70%);
  top: -160px;
  right: -120px;
  pointer-events: none;
}

.banner::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.18), transparent 70%);
  bottom: -140px;
  left: -100px;
  pointer-events: none;
}

.slides {
  position: relative;
  min-height: 340px;
}

.slide {
  display: none;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: center;
  padding: 36px;
  position: relative;
  z-index: 1;
}

.slide.active {
  display: grid;
  animation: slideFade 0.55s var(--ease);
}

@keyframes slideFade {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.slide h2 {
  font-size: 30px;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--ink);
  letter-spacing: -0.3px;
}

.slide h2 em {
  color: var(--brand-dark);
  font-style: normal;
  background: linear-gradient(120deg, var(--brand), #F59E0B);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.slide p {
  color: var(--ink-2);
  margin-bottom: 18px;
  font-size: 15.5px;
}

.slide .btn + .btn {
  margin-left: 10px;
}

.slide .art {
  justify-self: center;
  filter: drop-shadow(0 12px 28px rgba(249, 115, 22, 0.18));
  animation: floatY 5s ease-in-out infinite;
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.slide .art svg {
  width: 100%;
  max-width: 320px;
  height: auto;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.btn-primary {
  background: linear-gradient(120deg, var(--brand), #F59E0B);
  color: #fff;
  box-shadow: 0 6px 18px var(--brand-glow);
}

.btn-primary:hover {
  background: linear-gradient(120deg, var(--brand-dark), var(--brand));
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 10px 26px var(--brand-glow);
}

.btn-ghost {
  background: transparent;
  border-color: var(--brand);
  color: var(--brand-dark);
}

.btn-ghost:hover {
  background: var(--brand-soft);
  text-decoration: none;
  transform: translateY(-2px);
}

.dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}

.dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 0;
  background: rgba(0, 0, 0, 0.2);
  cursor: pointer;
  padding: 0;
  transition: width 0.3s var(--ease), background-color 0.3s var(--ease);
}

html[data-theme="dark"] .dots button {
  background: rgba(255, 255, 255, 0.28);
}

.dots button.on {
  background: var(--brand);
  width: 24px;
  border-radius: 6px;
}

.banner-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 0;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--brand-dark);
  cursor: pointer;
  font-size: 18px;
  box-shadow: var(--shadow);
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease);
}

.banner-nav:hover {
  transform: translateY(-50%) scale(1.1);
  background: var(--bg);
}

.banner-nav.prev {
  left: 10px;
}

.banner-nav.next {
  right: 10px;
}

/* ========== 数据条 ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 0 0 32px;
}

.stat {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.stat::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, var(--brand-glow));
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.stat:hover {
  transform: translateY(-4px);
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

.stat:hover::before {
  opacity: 0.5;
}

.stat b {
  display: block;
  font-size: 30px;
  color: var(--brand-dark);
  line-height: 1.2;
  position: relative;
  font-variant-numeric: tabular-nums;
}

.stat span {
  font-size: 13.5px;
  color: var(--muted);
  position: relative;
}

/* ========== 区块 ========== */
section {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

section:first-of-type {
  border-top: 0;
}

.sec-head {
  margin-bottom: 22px;
}

.sec-head h2 {
  font-size: 25px;
  line-height: 1.35;
  color: var(--ink);
  display: flex;
  align-items: center;
  letter-spacing: -0.2px;
}

.sec-head h2::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 22px;
  background: linear-gradient(180deg, var(--brand), #F59E0B);
  border-radius: 3px;
  margin-right: 10px;
  flex: 0 0 auto;
}

.sec-head p {
  color: var(--muted);
  margin-top: 8px;
  font-size: 15px;
  max-width: 820px;
}

h3 {
  font-size: 19px;
  margin: 22px 0 10px;
  color: var(--ink);
  line-height: 1.45;
}

h4 {
  font-size: 16.5px;
  margin: 16px 0 8px;
  color: var(--ink-2);
}

p {
  margin-bottom: 12px;
  color: var(--ink-2);
}

.lead {
  font-size: 17px;
  color: var(--ink);
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  padding: 16px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}

.lead::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--brand-glow), transparent 70%);
  pointer-events: none;
}

/* ========== 网格与卡片 ========== */
.grid {
  display: grid;
  gap: 18px;
}

.g2 {
  grid-template-columns: repeat(2, 1fr);
}

.g3 {
  grid-template-columns: repeat(3, 1fr);
}

.g4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), #F59E0B);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--brand);
  box-shadow: var(--shadow-lg);
}

.card:hover::before {
  transform: scaleX(1);
}

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

.card p {
  font-size: 14.5px;
  margin-bottom: 0;
}

.card .tag {
  display: inline-block;
  font-size: 12px;
  color: var(--brand-dark);
  background: var(--brand-soft);
  padding: 2px 9px;
  border-radius: 20px;
  margin-bottom: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.card svg {
  width: 44px;
  height: 44px;
  margin-bottom: 12px;
  transition: transform 0.35s var(--ease);
}

.card:hover svg {
  transform: scale(1.08) rotate(-4deg);
}

.card ul {
  font-size: 14.5px;
  color: var(--ink-2);
}

.card ul li {
  margin-bottom: 6px;
}

/* ========== 图文分栏 ========== */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}

.figure {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.figure:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.figure svg {
  border-radius: var(--radius-sm);
}

.figure figcaption {
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.6;
}

/* ========== 时间线 ========== */
.timeline {
  list-style: none;
  padding: 0;
  border-left: 2px solid var(--line);
  margin-left: 8px;
}

.timeline li {
  position: relative;
  padding: 0 0 20px 22px;
  transition: transform 0.25s var(--ease);
}

.timeline li:hover {
  transform: translateX(4px);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand);
  border: 2px solid var(--bg);
  transition: box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.timeline li:hover::before {
  box-shadow: 0 0 0 5px var(--brand-glow);
  transform: scale(1.15);
}

.timeline b {
  display: block;
  color: var(--brand-dark);
  font-size: 14px;
}

.timeline span {
  font-size: 14.5px;
  color: var(--ink-2);
}

/* ========== 清单 ========== */
.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 8px;
  color: var(--ink-2);
  font-size: 15px;
  transition: color 0.25s var(--ease);
}

.checklist li:hover {
  color: var(--ink);
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ok);
  font-weight: 700;
}

/* ========== 文章卡片 ========== */
.articles .card {
  display: flex;
  flex-direction: column;
}

.articles .meta {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 8px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.articles .meta span {
  color: var(--brand-dark);
  background: var(--brand-soft);
  padding: 1px 8px;
  border-radius: 20px;
  font-weight: 600;
}

.articles .more {
  margin-top: auto;
  padding-top: 10px;
  font-weight: 600;
  font-size: 14px;
  color: var(--brand-dark);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s var(--ease);
}

.articles .more:hover {
  text-decoration: none;
  gap: 8px;
}

/* ========== FAQ ========== */
.faq {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  box-shadow: var(--shadow);
}

.faq details {
  border-bottom: 1px solid var(--line);
  transition: background-color 0.25s var(--ease);
}

.faq details:last-child {
  border-bottom: 0;
}

.faq details[open] {
  background: var(--bg-2);
}

.faq summary {
  cursor: pointer;
  padding: 16px 44px 16px 20px;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--ink);
  list-style: none;
  position: relative;
  transition: color 0.25s var(--ease);
}

.faq summary:hover {
  color: var(--brand-dark);
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--brand);
  font-weight: 400;
  transition: transform 0.3s var(--ease);
}

.faq details[open] summary::after {
  content: "–";
  transform: translateY(-50%) rotate(180deg);
}

.faq .ans {
  padding: 0 20px 18px;
  color: var(--ink-2);
  font-size: 14.8px;
  animation: slideFade 0.35s var(--ease);
}

/* ========== HowTo 步骤 ========== */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
}

.steps li {
  position: relative;
  padding: 0 0 20px 52px;
  counter-increment: step;
  transition: transform 0.25s var(--ease);
}

.steps li:hover {
  transform: translateX(4px);
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), #F59E0B);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  box-shadow: 0 4px 12px var(--brand-glow);
  transition: transform 0.3s var(--ease);
}

.steps li:hover::before {
  transform: scale(1.1);
}

.steps b {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
}

/* ========== 表格 ========== */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 560px;
}

caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-weight: 600;
  color: var(--ink);
}

th,
td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: var(--bg-2);
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
}

tbody tr {
  transition: background-color 0.2s var(--ease);
}

tbody tr:hover {
  background: var(--brand-soft);
}

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

/* ========== 引用评价 ========== */
.quote {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.quote::before {
  content: "“";
  position: absolute;
  top: 4px;
  right: 16px;
  font-size: 56px;
  line-height: 1;
  color: var(--brand);
  opacity: 0.18;
  font-family: Georgia, serif;
}

.quote:hover {
  transform: translateY(-3px);
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

.quote p {
  font-size: 14.8px;
  color: var(--ink-2);
  font-style: italic;
  position: relative;
}

.quote footer {
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
}

/* ========== CTA ========== */
.cta {
  position: relative;
  background: linear-gradient(120deg, var(--brand) 0%, #F59E0B 60%, #FBBF24 100%);
  border-radius: var(--radius);
  padding: 34px;
  color: #fff;
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 24px;
  align-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  top: -120px;
  right: -80px;
}

.cta::after {
  content: "";
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  bottom: -100px;
  left: 30%;
}

.cta > * {
  position: relative;
  z-index: 1;
}

.cta h2 {
  color: #fff;
  font-size: 24px;
  margin-bottom: 8px;
  line-height: 1.35;
}

.cta p {
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 0;
}

.cta .btn-primary {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.14);
}

.cta .btn-primary:hover {
  background: #FFF7ED;
  transform: translateY(-2px);
}

/* ========== 页脚 ========== */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  margin-top: 20px;
  padding: 40px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 26px;
}

.footer h3 {
  font-size: 15.5px;
  margin: 0 0 12px;
  color: var(--ink);
}

.footer ul {
  list-style: none;
  padding: 0;
  font-size: 14px;
}

.footer li {
  margin-bottom: 8px;
}

.footer a {
  color: var(--ink-2);
  position: relative;
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.footer a:hover {
  color: var(--brand-dark);
  padding-left: 4px;
  text-decoration: none;
}

.footer .about {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

.footer .contact p {
  font-size: 14px;
  color: var(--ink-2);
  margin-bottom: 6px;
}

.copyright {
  border-top: 1px solid var(--line);
  margin-top: 26px;
  padding-top: 18px;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* ========== 返回顶部 ========== */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 0;
  background: linear-gradient(135deg, var(--brand), #F59E0B);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
  z-index: 120;
}

.to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.to-top:hover {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 16px 36px var(--brand-glow);
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* ========== 响应式 ========== */
@media (max-width: 1080px) {
  .menu a {
    padding: 8px 9px;
    font-size: 14px;
  }

  .search input {
    width: 120px;
  }
}

@media (max-width: 980px) {
  .slide {
    grid-template-columns: 1fr;
    padding: 26px;
  }

  .slide .art {
    display: none;
  }

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

  .g4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .g3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .cta {
    grid-template-columns: 1fr;
    padding: 26px;
  }

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

@media (max-width: 760px) {
  html {
    scroll-padding-top: 76px;
  }

  body {
    font-size: 15.5px;
  }

  .menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 16px;
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius) var(--radius);
  }

  .menu.open {
    display: flex;
    animation: slideFade 0.3s var(--ease);
  }

  .menu a {
    padding: 11px 12px;
  }

  .menu a::after {
    display: none;
  }

  .burger {
    display: inline-flex;
  }

  .search input {
    width: 100px;
  }

  .g2,
  .g3,
  .g4 {
    grid-template-columns: 1fr;
  }

  .slide h2 {
    font-size: 23px;
  }

  .slide p {
    font-size: 14.5px;
  }

  .sec-head h2 {
    font-size: 21px;
  }

  .sec-head h2::before {
    height: 18px;
  }

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

  .nav {
    position: relative;
  }

  .banner-nav {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .stat b {
    font-size: 25px;
  }

  .cta h2 {
    font-size: 20px;
  }

  .topbar .wrap {
    justify-content: center;
    text-align: center;
    font-size: 12px;
  }

  .lead {
    font-size: 15.5px;
    padding: 14px 16px;
  }
}

@media (max-width: 420px) {
  .wrap {
    padding: 0 14px;
  }

  .logo {
    font-size: 17px;
  }

  .logo svg {
    width: 32px;
    height: 32px;
  }

  .logo small {
    font-size: 10px;
  }

  .search input {
    width: 78px;
    padding: 7px 8px;
  }

  .search button {
    padding: 7px 9px;
    font-size: 13px;
  }

  .icon-btn {
    width: 34px;
    height: 34px;
  }

  .slide {
    padding: 20px;
  }

  .slide h2 {
    font-size: 20px;
  }

  .btn {
    padding: 10px 16px;
    font-size: 14px;
  }

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

/* ========== 减少动效 ========== */
@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;
  }

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

  .slide .art {
    animation: none;
  }
}

/* ========== 打印 ========== */
@media print {
  .topbar,
  .header,
  .banner-nav,
  .dots,
  .to-top,
  .tools,
  .footer {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .card,
  .faq,
  .table-wrap {
    box-shadow: none;
    border-color: #ccc;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}