/* ==========================================================================
   广州快链网络科技有限公司 — 企业官网全局样式
   Style: 简约 / 大气 / 现代企业级
   ========================================================================== */

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

:root {
  /* 色彩 */
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-deep: #0a1428;
  --ink: #0b1220;
  --ink-2: #2c3748;
  --muted: #5b6472;
  --muted-2: #8b93a1;
  --line: #e6e8ec;
  --line-strong: #d3d7de;
  --brand: #1256e0;
  --brand-dark: #0a3fa8;
  --brand-soft: rgba(18, 86, 224, 0.08);
  --brand-soft-2: rgba(18, 86, 224, 0.14);
  --accent: #0ea5a0;

  /* 排版 */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
    Arial, sans-serif;
  --font-num: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas,
    monospace;

  /* 布局 */
  --container: 1180px;
  --radius: 14px;
  --radius-lg: 22px;
  --header-h: 72px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(11, 18, 32, 0.04),
    0 4px 14px -6px rgba(11, 18, 32, 0.08);
  --shadow-md: 0 2px 6px rgba(11, 18, 32, 0.05),
    0 18px 40px -18px rgba(11, 18, 32, 0.16);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.022em;
}

p {
  margin: 0;
}

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

/* --------------------------------------------------------------------------
   布局工具
   -------------------------------------------------------------------------- */

.container {
  width: min(var(--container), 90vw);
  margin: 0 auto;
}

.section {
  padding: 120px 0;
  position: relative;
}

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

.section--tight {
  padding: 88px 0;
}

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

/* 章节标题组 */
.sec-head {
  max-width: 720px;
  margin-bottom: 64px;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 20px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
}

.sec-head--center .eyebrow::before {
  display: none;
}

.sec-title {
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  margin-bottom: 20px;
}

.sec-desc {
  font-size: 1.0625rem;
  color: var(--muted);
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.24s var(--ease);
  white-space: nowrap;
  font-family: inherit;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.24s var(--ease);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 22px -10px rgba(18, 86, 224, 0.65);
}

.btn--primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -12px rgba(18, 86, 224, 0.7);
}

.btn--ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

.btn--light {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
}

.btn--light:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}

.btn--sm {
  height: 40px;
  padding: 0 18px;
  font-size: 0.875rem;
  border-radius: 9px;
}

/* 文字链接 */
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--brand);
}

.link-more svg {
  width: 15px;
  height: 15px;
  transition: transform 0.24s var(--ease);
}

.link-more:hover svg {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   顶部导航
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.92);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  width: min(var(--container), 90vw);
  margin: 0 auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.logo-mark {
  width: 34px;
  height: 34px;
  color: var(--brand);
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-cn {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.logo-en {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--muted-2);
  text-transform: uppercase;
}

/* 菜单 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  position: relative;
  padding: 9px 15px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--muted);
  border-radius: 8px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-links a:hover {
  color: var(--ink);
  background: var(--bg-soft);
}

.nav-links a.is-active {
  color: var(--ink);
  font-weight: 600;
}

.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 1px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  position: relative;
  display: block;
  width: 17px;
  height: 1.6px;
  background: var(--ink);
  border-radius: 2px;
  transition: background 0.2s var(--ease);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.6px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.24s var(--ease);
}

.nav-toggle span::before {
  top: -5.5px;
}

.nav-toggle span::after {
  top: 5.5px;
}

.nav-toggle.is-open span {
  background: transparent;
}

.nav-toggle.is-open span::before {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle.is-open span::after {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* 移动端下拉菜单 */
.mobile-menu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 99;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 12px 5vw 24px;
  display: none;
  flex-direction: column;
  gap: 2px;
  box-shadow: var(--shadow-md);
}

.mobile-menu.is-open {
  display: flex;
  animation: slideDown 0.24s var(--ease);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-menu a {
  padding: 14px 4px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.mobile-menu a:last-of-type {
  border-bottom: 0;
}

.mobile-menu .btn {
  margin-top: 14px;
  width: 100%;
}

/* --------------------------------------------------------------------------
   Hero 首屏
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding: 104px 0 108px;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(920px 440px at 80% -14%, rgba(18, 86, 224, 0.11), transparent 68%),
    radial-gradient(620px 320px at 4% 8%, rgba(14, 165, 160, 0.08), transparent 70%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 30%,
    #000 20%,
    transparent 100%
  );
  mask-image: radial-gradient(
    ellipse 80% 60% at 50% 30%,
    #000 20%,
    transparent 100%
  );
  opacity: 0.65;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 72px;
  align-items: center;
}

.hero-title {
  font-size: clamp(2.3rem, 4.6vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  margin-bottom: 26px;
}

.hero-title .grad {
  background: linear-gradient(100deg, var(--brand) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 540px;
  margin-bottom: 38px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 52px;
}

/* 数据条 */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 32px;
}

.stat {
  padding-right: 44px;
  margin-right: 44px;
  border-right: 1px solid var(--line);
}

.stat:last-child {
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}

.stat-num {
  font-family: var(--font-num);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--muted-2);
  margin-top: 2px;
  letter-spacing: 0.02em;
}

/* Hero 右侧视觉：产品卡堆叠 */
.hero-visual {
  position: relative;
  height: 452px;
}

.visual-card {
  position: absolute;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.visual-card--back {
  top: 34px;
  right: 0;
  width: 82%;
  height: 300px;
  transform: rotate(3.2deg);
  opacity: 0.75;
}

.visual-card--main {
  top: 0;
  left: 0;
  width: 86%;
  height: 340px;
  animation: floatY 7s ease-in-out infinite;
}

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

.visual-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}

.visual-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--line-strong);
}

.visual-dot--brand {
  background: var(--brand);
  opacity: 0.6;
}

.visual-body {
  padding: 2px 1px;
}

.skeleton-row {
  height: 11px;
  border-radius: 6px;
  background: linear-gradient(90deg, #eef0f4, #f7f8fa);
  margin-bottom: 13px;
}

.skeleton-row--brand {
  background: linear-gradient(90deg, rgba(18, 86, 224, 0.28), rgba(18, 86, 224, 0.1));
}

.w-90 {
  width: 90%;
}
.w-70 {
  width: 70%;
}
.w-50 {
  width: 50%;
}
.w-40 {
  width: 40%;
}

/* 浮动徽标 */
.float-badge {
  position: absolute;
  bottom: 34px;
  left: 6%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  animation: floatY 6s ease-in-out infinite 0.6s;
}

.badge-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.badge-icon svg {
  width: 20px;
  height: 20px;
}

.badge-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
}

.badge-sub {
  font-size: 0.75rem;
  color: var(--muted-2);
}

/* --------------------------------------------------------------------------
   卡片网格
   -------------------------------------------------------------------------- */

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

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* 服务卡 */
.card {
  position: relative;
  padding: 38px 34px 36px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
}

.card-icon svg {
  width: 25px;
  height: 25px;
}

.card-num {
  position: absolute;
  top: 34px;
  right: 34px;
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted-2);
  letter-spacing: 0.06em;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.card p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.8;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 4px 11px;
  border-radius: 100px;
}

/* --------------------------------------------------------------------------
   产品（APP）展示
   -------------------------------------------------------------------------- */

.app-showcase {
  display: grid;
  gap: 28px;
}

.app-card {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.app-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}

.app-card:nth-child(even) .app-visual {
  order: 2;
}

.app-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 40px;
  background: var(--bg-soft);
  border-right: 1px solid var(--line);
  overflow: hidden;
}

/* 手机模型 */
.phone {
  position: relative;
  width: 175px;
  height: 356px;
  border-radius: 28px;
  background: #fff;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-md);
  padding: 14px 13px;
  overflow: hidden;
}

/* 真机截图模式：铺满整个手机框 */
.phone--shot {
  padding: 0;
  background: #0b0b0f;
}

.phone--shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.phone--shot .phone-notch {
  z-index: 2;
  background: rgba(255, 255, 255, 0.35);
}

.phone-notch {
  position: absolute;
  top: 9px;
  left: 50%;
  transform: translateX(-50%);
  width: 52px;
  height: 4px;
  border-radius: 4px;
  background: var(--line-strong);
}

.phone-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 16px;
}

.phone-avatar {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
}

.phone-title {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

.phone-sub {
  font-size: 8px;
  color: var(--muted-2);
}

.phone-line {
  height: 7px;
  border-radius: 4px;
  background: #eef0f4;
  margin-bottom: 8px;
}

.phone-bubble {
  border-radius: 9px;
  padding: 9px 10px;
  margin-bottom: 8px;
}

.phone-bubble--in {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  margin-right: 26px;
}

.phone-bubble--out {
  background: var(--brand);
  margin-left: 26px;
}

.phone-bubble--out .phone-line {
  background: rgba(255, 255, 255, 0.42);
}

/* 视觉装饰色块 */
.app-visual__glow {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  filter: blur(56px);
  opacity: 0.5;
  z-index: 0;
}

.app-visual__glow--read {
  background: rgba(18, 86, 224, 0.3);
}

.app-visual__glow--chat {
  background: rgba(14, 165, 160, 0.28);
}

.app-visual__glow--disk {
  background: rgba(124, 58, 237, 0.26);
}

.phone {
  z-index: 1;
}

.app-body {
  padding: 52px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: 100px;
  padding: 5px 13px;
  margin-bottom: 20px;
}

.app-badge--teal {
  color: #0b7f7b;
  background: rgba(14, 165, 160, 0.1);
}

.app-badge--disk {
  color: #6d28d9;
  background: rgba(124, 58, 237, 0.1);
}

.app-body h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.app-body > p {
  font-size: 0.9688rem;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 26px;
}

.app-features {
  display: grid;
  gap: 11px;
  margin-bottom: 32px;
}

.app-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9063rem;
  color: var(--ink-2);
}

.app-features svg {
  width: 17px;
  height: 17px;
  color: var(--brand);
  flex-shrink: 0;
  margin-top: 3px;
}

.app-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.app-url {
  font-family: var(--font-num);
  font-size: 0.8125rem;
  color: var(--muted-2);
}

/* --------------------------------------------------------------------------
   特色 / 优势列表
   -------------------------------------------------------------------------- */

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 56px;
}

.feature {
  display: flex;
  gap: 18px;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon svg {
  width: 21px;
  height: 21px;
}

.feature h4 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.feature p {
  font-size: 0.9063rem;
  color: var(--muted);
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   时间线
   -------------------------------------------------------------------------- */

.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.timeline-item {
  position: relative;
  padding-bottom: 44px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--brand);
}

.timeline-year {
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.timeline-item h4 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.9063rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 620px;
}

/* --------------------------------------------------------------------------
   流程步骤
   -------------------------------------------------------------------------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 0 30px 0 0;
}

.step::after {
  content: "";
  position: absolute;
  top: 19px;
  left: 52px;
  right: 18px;
  height: 1px;
  background: var(--line);
}

.step:last-child::after {
  display: none;
}

.step-num {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line-strong);
  color: var(--brand);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  position: relative;
  z-index: 1;
}

.step h4 {
  font-size: 1.0313rem;
  margin-bottom: 10px;
}

.step p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   CTA 区块
   -------------------------------------------------------------------------- */

.cta {
  position: relative;
  overflow: hidden;
  background: var(--bg-deep);
  border-radius: var(--radius-lg);
  padding: 82px 64px;
  text-align: center;
  isolation: isolate;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(680px 320px at 50% -10%, rgba(18, 86, 224, 0.5), transparent 70%),
    radial-gradient(520px 260px at 88% 110%, rgba(14, 165, 160, 0.28), transparent 70%);
}

.cta h2 {
  color: #fff;
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  margin-bottom: 18px;
}

.cta p {
  color: rgba(255, 255, 255, 0.66);
  font-size: 1.0625rem;
  max-width: 560px;
  margin: 0 auto 38px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* --------------------------------------------------------------------------
   页面头部（内页）
   -------------------------------------------------------------------------- */

.page-hero {
  position: relative;
  padding: 92px 0 76px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(
    820px 380px at 76% -22%,
    rgba(18, 86, 224, 0.1),
    transparent 68%
  );
}

.page-hero--soft {
  background: var(--bg-soft);
}

.page-title {
  font-size: clamp(2rem, 3.8vw, 3rem);
  margin-bottom: 22px;
  letter-spacing: -0.03em;
}

.page-desc {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 660px;
  line-height: 1.85;
}

.crumb {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.8125rem;
  color: var(--muted-2);
  margin-bottom: 26px;
}

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

.crumb span {
  opacity: 0.55;
}

/* --------------------------------------------------------------------------
   联系页
   -------------------------------------------------------------------------- */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 64px;
  align-items: start;
}

.info-list {
  display: grid;
  gap: 4px;
}

.info-item {
  display: flex;
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.info-item:first-child {
  padding-top: 0;
}

.info-item:last-child {
  border-bottom: 0;
}

.info-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-icon svg {
  width: 21px;
  height: 21px;
}

.info-label {
  font-size: 0.8125rem;
  color: var(--muted-2);
  letter-spacing: 0.04em;
  margin-bottom: 5px;
}

.info-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
}

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

.info-note {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 5px;
}

/* 公众号二维码 */
.wechat-qr {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 34px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius, 14px);
}

.wechat-qr__img {
  width: 132px;
  height: 132px;
  border-radius: 10px;
  border: 1px solid var(--line);
  flex-shrink: 0;
}

.wechat-qr__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.wechat-qr__desc {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 560px) {
  .wechat-qr {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 表单 */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 46px 44px;
  box-shadow: var(--shadow-sm);
}

.form-card h3 {
  font-size: 1.375rem;
  margin-bottom: 10px;
}

.form-card > p {
  font-size: 0.9063rem;
  color: var(--muted);
  margin-bottom: 32px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field--full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 0.8438rem;
  font-weight: 600;
  color: var(--ink);
}

.field label .req {
  color: var(--brand);
  margin-left: 2px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 12px 15px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  outline: none;
}

.field textarea {
  min-height: 132px;
  resize: vertical;
  line-height: 1.7;
}

.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235b6472' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 15px center;
  padding-right: 40px;
  cursor: pointer;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3.5px var(--brand-soft);
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--muted-2);
}

.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--muted-2);
  max-width: 300px;
  line-height: 1.6;
}

.form-status {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  padding: 14px 18px;
  border-radius: 11px;
  background: rgba(14, 165, 160, 0.09);
  border: 1px solid rgba(14, 165, 160, 0.3);
  color: #0b7f7b;
  font-size: 0.9063rem;
}

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

.form-status svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* 地图占位 */
.map-box {
  position: relative;
  margin-top: 24px;
  height: 360px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.map-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.9;
}

.map-pin {
  position: relative;
  z-index: 1;
  text-align: center;
}

.map-pin__dot {
  width: 54px;
  height: 54px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 10px rgba(18, 86, 224, 0.12),
    0 0 0 22px rgba(18, 86, 224, 0.06);
}

.map-pin__dot svg {
  width: 26px;
  height: 26px;
}

.map-pin__text {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
}

.map-pin__sub {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  padding: 72px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 0.9063rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 20px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  display: grid;
  gap: 12px;
}

.footer-col a {
  font-size: 0.9063rem;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

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

.footer-contact {
  display: grid;
  gap: 12px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9063rem;
  color: var(--muted);
  line-height: 1.7;
}

.footer-contact svg {
  width: 17px;
  height: 17px;
  color: var(--muted-2);
  flex-shrink: 0;
  margin-top: 4px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0 30px;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--muted-2);
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.footer-bottom-links a:hover {
  color: var(--brand);
}

.footer-icp {
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   滚动进场动画
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}

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

.reveal-d1 {
  transition-delay: 0.08s;
}
.reveal-d2 {
  transition-delay: 0.16s;
}
.reveal-d3 {
  transition-delay: 0.24s;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .hero-visual {
    height: 400px;
    max-width: 520px;
  }
  .hero-sub {
    max-width: none;
  }
  .grid-4,
  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }
  .step::after {
    display: none;
  }
  .app-card {
    grid-template-columns: 1fr;
  }
  .app-card:nth-child(even) .app-visual {
    order: 0;
  }
  .app-visual {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 48px 32px;
  }
  .app-body {
    padding: 44px 36px;
  }
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 52px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .cta {
    padding: 64px 40px;
  }
}

@media (max-width: 820px) {
  .section {
    padding: 84px 0;
  }
  .nav-links,
  .nav-right .btn {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .feature-list {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-card {
    padding: 34px 26px;
  }
  .stats {
    gap: 28px 0;
  }
  .stat {
    padding-right: 28px;
    margin-right: 28px;
  }
  .hero {
    padding: 68px 0 78px;
  }
  .page-hero {
    padding: 68px 0 56px;
  }
  .sec-head {
    margin-bottom: 44px;
  }
}

@media (max-width: 560px) {
  .grid-4,
  .steps {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta {
    padding: 52px 26px;
    border-radius: 18px;
  }
  .hero-visual {
    height: 340px;
  }
  .visual-card--main {
    height: 290px;
  }
  .visual-card--back {
    height: 250px;
  }
  .float-badge {
    left: 0;
    padding: 12px 16px;
  }
  .stat {
    padding-right: 22px;
    margin-right: 22px;
  }
  .stat-num {
    font-size: 1.45rem;
  }
  .app-visual {
    padding: 40px 22px;
  }
  .app-body {
    padding: 34px 24px;
  }
  .card {
    padding: 30px 24px;
  }
  .card-num {
    top: 28px;
    right: 24px;
  }
}