:root {
  --white: #F8FAFC;
  --blue: #2A6DEA;
  --blue-deep: #1E3A8A;
  --blue-bright: #3B82F6;
  --orange: #FF8A00;
  --purple: #9B51E0;
  --gray: #6B7280;
  --cream: #FFF7ED;
  --dark: #111827;
  --glass-white: rgba(248, 250, 252, 0.78);
  --glass-border: rgba(255, 255, 255, 0.6);
  --shadow-sm: 0 4px 14px rgba(17, 24, 39, 0.06);
  --shadow-md: 0 16px 40px rgba(30, 58, 138, 0.10);
  --shadow-lg: 0 24px 60px rgba(17, 24, 39, 0.14);
  --radius-pill: 999px;
  --radius-card: 28px;
  --radius-panel: 24px;
  --radius-soft: 18px;
  --side-track-w: 272px;
  --top-dock-h: 72px;
  --capsule-gap: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  font-size: 16px;
  --font-heading: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--white);
  color: var(--dark);
  min-height: 100vh;
  overflow-x: hidden;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

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

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
  border-radius: 8px;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  clip-path: inset(50%);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  background: var(--dark);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  transform: translateY(-150%);
  transition: transform 0.3s var(--ease);
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.skip-link:focus-visible {
  transform: translateY(0);
  color: #fff;
}

.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== 侧边轨道导航 ===== */
.side-track {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--side-track-w);
  background: var(--dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 32px 24px 28px;
  z-index: 300;
  overflow-y: auto;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 6px;
}

.brand-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18), 0 8px 24px rgba(59, 130, 246, 0.35);
  flex: 0 0 auto;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.brand-mark:hover {
  transform: translateY(-3px) rotate(-3deg);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.3), 0 14px 32px rgba(59, 130, 246, 0.45);
}

.brand-mark-core {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 255, 255, 0.25), 0 0 20px rgba(255, 138, 0, 0.8);
}

.brand-mark-orbit {
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  border: 1.5px dashed rgba(255, 255, 255, 0.7);
  animation: spin-orbit 14s linear infinite;
}

@keyframes spin-orbit {
  to {
    transform: rotate(360deg);
  }
}

.brand-text-group {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: #fff;
}

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

.brand-subtitle {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 2px;
}

.nav-stack {
  display: flex;
  flex-direction: column;
  gap: var(--capsule-gap);
  margin-top: 42px;
}

.nav-pill {
  display: block;
  padding: 13px 20px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.72);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.02em;
  background: transparent;
  border: 1px solid transparent;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.nav-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding-left: 26px;
  border-color: rgba(255, 255, 255, 0.16);
}

.nav-pill[aria-current="page"] {
  background: linear-gradient(90deg, var(--blue), var(--blue-bright));
  color: #fff;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(42, 109, 234, 0.5);
  border-color: transparent;
  padding-left: 24px;
}

.nav-pill[aria-current="page"]::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--orange);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.trust-strip {
  margin-top: auto;
  padding: 18px 16px;
  border-radius: var(--radius-soft);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.6);
}

.trust-strip p {
  flex: 1;
}

.trust-strip-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  margin-top: 4px;
  box-shadow: 0 0 0 4px rgba(255, 138, 0, 0.2);
  animation: dot-pulse 2s infinite;
}

@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(255, 138, 0, 0.25); }
  50% { box-shadow: 0 0 0 8px rgba(255, 138, 0, 0.05); }
}

/* ===== 顶部栏 ===== */
.top-dock {
  display: none;
  position: sticky;
  top: 0;
  z-index: 400;
  height: var(--top-dock-h);
  align-items: center;
  gap: 18px;
  padding: 0 20px;
  background: var(--glass-white);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(42, 109, 234, 0.12);
  margin-left: 0;
}

.mini-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: var(--dark);
  white-space: nowrap;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1.5px solid rgba(42, 109, 234, 0.3);
  border-radius: var(--radius-pill);
  padding: 10px 16px;
  cursor: pointer;
  color: var(--blue);
  font-weight: 600;
  font-size: 14px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.menu-toggle:hover {
  background: rgba(42, 109, 234, 0.08);
  border-color: var(--blue);
}

.menu-toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.menu-toggle[data-open="true"] .menu-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[data-open="true"] .menu-toggle-line:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
}

.menu-toggle-text {
  font-size: 13px;
}

.search-wrap {
  position: relative;
  flex: 1;
  max-width: 480px;
  margin-left: auto;
}

.search-input {
  width: 100%;
  height: 44px;
  border: 1.5px solid rgba(42, 109, 234, 0.18);
  border-radius: var(--radius-pill);
  background: #fff;
  padding: 0 20px 0 44px;
  font-size: 14px;
  color: var(--dark);
  transition: border-color 0.25s, box-shadow 0.25s;
}

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

.search-input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(42, 109, 234, 0.12);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gray);
  border-radius: 50%;
  transform: translateY(-60%);
  transition: border-color 0.25s;
}

.search-icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 7px;
  height: 2px;
  background: var(--gray);
  transform: rotate(45deg);
  border-radius: 2px;
}

.search-input:focus ~ .search-icon {
  border-color: var(--blue);
}

.search-input:focus ~ .search-icon::after {
  background: var(--blue);
}

.search-suggest {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid rgba(42, 109, 234, 0.12);
  border-radius: var(--radius-soft);
  box-shadow: var(--shadow-md);
  padding: 8px;
  z-index: 50;
  list-style: none;
}

.search-suggest li {
  border-radius: 12px;
}

.search-suggest li a,
.search-suggest li button {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 14px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  font-size: 14px;
  color: var(--dark);
  cursor: pointer;
  text-align: left;
}

.search-suggest li a:hover,
.search-suggest li button:hover {
  background: var(--cream);
  color: var(--blue);
}

.search-suggest .suggest-tag {
  font-size: 11px;
  color: var(--gray);
  background: var(--cream);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  margin-left: auto;
  flex: 0 0 auto;
}

/* ===== 侧边抽屉遮罩 ===== */
.side-drawer-scrim {
  display: none;
}

/* ===== 主内容区 ===== */
.site-main {
  flex: 1;
  width: calc(100% - var(--side-track-w));
  margin-left: var(--side-track-w);
  padding: 0 56px 80px;
  max-width: 1440px;
}

.page-enter {
  animation: fade-rise 0.6s var(--ease) both;
}

@keyframes fade-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 图片容器基础 ===== */
.img-frame {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: linear-gradient(145deg, #eef2ff, var(--cream));
  box-shadow: var(--shadow-sm);
  isolation: isolate;
}

.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(42, 109, 234, 0.2), transparent 60%),
    linear-gradient(145deg, transparent 60%, rgba(155, 81, 224, 0.16));
  z-index: -1;
}

.img-frame::after {
  content: "图片空间";
  position: absolute;
  bottom: 14px;
  left: 18px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
  background: rgba(255, 255, 255, 0.7);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.img-frame:hover img {
  transform: scale(1.03);
}

.img-16x9 {
  aspect-ratio: 16 / 9;
}

.img-4x3 {
  aspect-ratio: 4 / 3;
}

.img-square {
  aspect-ratio: 1 / 1;
}

.img-glow {
  box-shadow: 0 24px 60px rgba(42, 109, 234, 0.18);
}

/* ===== 首屏专题封面 ===== */
.hero-cover {
  position: relative;
  padding: 72px 0 56px;
}

.hero-cover::before {
  content: "";
  position: absolute;
  top: 0;
  right: -6%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 0, 0.16), transparent 65%);
  pointer-events: none;
}

.hero-cover::after {
  content: "";
  position: absolute;
  top: 40px;
  right: 8%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 2px dashed rgba(42, 109, 234, 0.25);
  animation: spin-orbit 30s linear infinite;
  pointer-events: none;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--blue);
  background: rgba(42, 109, 234, 0.08);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  margin-bottom: 32px;
  text-transform: uppercase;
}

.hero-kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 0, 0.18);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(46px, 7vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--dark);
  max-width: 900px;
  position: relative;
  z-index: 1;
}

.hero-title .accent-gradient {
  background: linear-gradient(90deg, var(--blue), var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  margin-top: 24px;
  max-width: 560px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--gray);
  border-left: 3px solid var(--orange);
  padding-left: 20px;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-pill);
  padding: 14px 28px;
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s, border-color 0.25s;
  white-space: nowrap;
}

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

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

.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 10px 28px rgba(42, 109, 234, 0.28);
}

.btn-primary:hover {
  background: var(--blue-deep);
  color: #fff;
  box-shadow: 0 14px 36px rgba(42, 109, 234, 0.36);
}

.btn-accent {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 10px 28px rgba(255, 138, 0, 0.26);
}

.btn-accent:hover {
  background: #e67e00;
  color: #fff;
  box-shadow: 0 14px 36px rgba(255, 138, 0, 0.36);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(42, 109, 234, 0.4);
  color: var(--blue);
}

.btn-ghost:hover {
  border-color: var(--blue);
  background: rgba(42, 109, 234, 0.06);
  color: var(--blue);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ===== 分段标签页 ===== */
.segment-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  background: rgba(42, 109, 234, 0.06);
  border-radius: var(--radius-pill);
  padding: 6px;
}

.segment-btn {
  border: 0;
  background: transparent;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 14px;
  color: var(--gray);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, box-shadow 0.25s;
}

.segment-btn:hover {
  color: var(--blue);
}

.segment-btn[aria-selected="true"] {
  background: #fff;
  color: var(--blue);
  box-shadow: var(--shadow-sm);
}

.segment-panel {
  display: none;
  animation: fade-rise 0.4s var(--ease) both;
}

.segment-panel[data-active="true"] {
  display: block;
}

/* ===== 卡片 ===== */
.zone-card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  border: 1px solid rgba(42, 109, 234, 0.06);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.zone-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.zone-card--purple-border {
  border-top: 4px solid var(--purple);
}

.zone-card--orange-border {
  border-top: 4px solid var(--orange);
}

.zone-card--blue-border {
  border-top: 4px solid var(--blue);
}

.float-card {
  background: var(--glass-white);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-md);
  padding: 24px;
}

.plaque-card {
  background: var(--cream);
  border-radius: var(--radius-soft);
  padding: 20px 24px;
  border-left: 4px solid var(--orange);
  font-size: 14px;
  color: var(--dark);
  line-height: 1.7;
}

/* ===== 网格 ===== */
.grid-card {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

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

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

.grid-bleed {
  grid-column: 1 / -1;
}

/* ===== 正文排版 ===== */
.prose {
  font-size: 15px;
  line-height: 1.8;
  color: #1f2937;
}

.prose h2 {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--dark);
  margin: 48px 0 20px;
  letter-spacing: -0.01em;
}

.prose h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  color: var(--dark);
  margin: 36px 0 14px;
}

.prose p {
  margin-bottom: 18px;
}

.prose a {
  font-weight: 500;
  border-bottom: 2px solid rgba(42, 109, 234, 0.2);
}

.prose a:hover {
  border-bottom-color: var(--orange);
}

.prose ul,
.prose ol {
  margin: 0 0 18px;
  padding-left: 24px;
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

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

.prose blockquote {
  border-left: 4px solid var(--purple);
  background: rgba(155, 81, 224, 0.06);
  padding: 16px 24px;
  border-radius: 0 var(--radius-soft) var(--radius-soft) 0;
  margin: 24px 0;
  color: var(--gray);
}

.note-line {
  font-size: 12px;
  color: var(--gray);
  line-height: 1.6;
}

.note-line::before {
  content: "·";
  display: inline-block;
  margin-right: 6px;
  color: var(--purple);
  font-weight: 700;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  padding: 18px 0;
  color: var(--gray);
}

.crumb-link {
  color: var(--blue);
  font-weight: 500;
}

.crumb-link:hover {
  color: var(--orange);
}

.breadcrumb-sep {
  color: rgba(42, 109, 234, 0.35);
}

.crumb-current {
  color: var(--gray);
  font-weight: 500;
}

/* ===== 页脚 ===== */
.site-footer {
  position: relative;
  background: var(--dark);
  color: #fff;
  margin-left: var(--side-track-w);
  padding: 72px 56px 28px;
  overflow: hidden;
}

.footer-marquee {
  position: absolute;
  top: 28px;
  right: 0;
  left: 0;
  display: flex;
  gap: 32px;
  white-space: nowrap;
  opacity: 0.05;
  font-family: var(--font-heading);
  font-size: 88px;
  font-weight: 700;
  letter-spacing: 0.02em;
  pointer-events: none;
  user-select: none;
  animation: marquee-slide 40s linear infinite;
}

@keyframes marquee-slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.footer-marquee span {
  flex: 0 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.6fr;
  gap: 48px;
  position: relative;
  z-index: 2;
}

.footer-brand .brand-lockup {
  padding: 0;
}

.brand-lockup--light .brand-name {
  color: #fff;
}

.brand-lockup--light .brand-subtitle {
  color: rgba(255, 255, 255, 0.5);
}

.footer-trust {
  margin-top: 24px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.6);
  max-width: 340px;
}

.footer-service-note {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  background: rgba(255, 255, 255, 0.06);
  padding: 10px 16px;
  border-radius: var(--radius-pill);
}

.service-note-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 0, 0.18);
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 20px;
}

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link-list a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s, transform 0.2s var(--ease);
}

.footer-link-list a:hover {
  color: var(--orange);
  transform: translateX(4px);
}

.footer-link-list a::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-bright);
  opacity: 0.5;
  transition: background 0.2s;
}

.footer-link-list a:hover::before {
  background: var(--orange);
  opacity: 1;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.contact-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.35);
}

.footer-contact-list a {
  color: #fff;
  font-weight: 500;
}

.footer-contact-list a:hover {
  color: var(--orange);
}

.footer-bottom {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-icp {
  letter-spacing: 0.06em;
}

/* ===== 返回顶部 ===== */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 500;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(18px) scale(0.9);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
}

.back-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-top:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: var(--shadow-lg);
}

.back-top-arrow {
  width: 12px;
  height: 12px;
  border-top: 2.5px solid #fff;
  border-left: 2.5px solid #fff;
  transform: rotate(45deg) translate(2px, 2px);
}

/* ===== 滚动显现 ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

[data-reveal="visible"] {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 客服悬浮入口 ===== */
.service-fab {
  position: fixed;
  right: 28px;
  bottom: 96px;
  z-index: 480;
  width: 54px;
  height: 54px;
  border-radius: var(--radius-pill);
  background: var(--orange);
  color: #fff;
  box-shadow: 0 12px 32px rgba(255, 138, 0, 0.32);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  line-height: 1.1;
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}

.service-fab:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 18px 40px rgba(255, 138, 0, 0.42);
  color: #fff;
}

.service-fab::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: var(--radius-pill);
  border: 2px solid rgba(255, 138, 0, 0.3);
  animation: fab-ring 2.4s infinite;
}

@keyframes fab-ring {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.4; }
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .site-main {
    padding: 0 28px 72px;
  }

  .site-footer {
    padding-left: 28px;
    padding-right: 28px;
  }
}

@media (max-width: 900px) {
  :root {
    --top-dock-h: 64px;
  }

  .side-track {
    width: min(320px, 86vw);
    transform: translateX(-105%);
    transition: transform 0.45s var(--ease);
    box-shadow: var(--shadow-lg);
  }

  .side-track[data-open="true"] {
    transform: translateX(0);
  }

  .side-drawer-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 290;
    background: rgba(17, 24, 39, 0.45);
    backdrop-filter: blur(3px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
  }

  .side-drawer-scrim[data-visible="true"] {
    opacity: 1;
    visibility: visible;
  }

  .top-dock {
    display: flex;
    margin-left: 0;
  }

  .site-main {
    width: 100%;
    margin-left: 0;
    padding: 0 20px 64px;
  }

  .site-footer {
    margin-left: 0;
    padding: 56px 24px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

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

  .back-top {
    right: 18px;
    bottom: 18px;
  }

  .service-fab {
    right: 18px;
    bottom: 82px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .top-dock {
    padding: 0 14px;
    gap: 12px;
  }

  .menu-toggle {
    padding: 8px 12px;
  }

  .menu-toggle-text {
    display: none;
  }

  .mini-brand {
    font-size: 16px;
  }

  .search-wrap {
    max-width: none;
  }

  .search-input {
    padding-left: 38px;
  }

  .search-icon {
    left: 13px;
  }

  .hero-cover {
    padding: 48px 0 40px;
  }

  .hero-cover::after {
    width: 100px;
    height: 100px;
    right: -10px;
  }

  .hero-title {
    font-size: 40px;
  }

  .hero-lede {
    font-size: 15px;
    padding-left: 14px;
  }

  .grid-card {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .zone-card {
    padding: 22px;
  }

  .segment-tabs {
    border-radius: 20px;
  }

  .segment-btn {
    padding: 9px 16px;
    font-size: 13px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-marquee {
    font-size: 56px;
  }

  .breadcrumb {
    padding: 12px 0;
  }

  .service-fab {
    display: none;
  }
}

/* ===== 减少动态偏好 ===== */
@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}