/* ==========================================================
   广西信睿科技有限公司官网 - 全站公共样式
   风格：现代科技感 + 科技蓝 | 断点：375/768/1024/1440/1920/2560
   ========================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 主色 */
  --c-primary: #1a6cf0;
  --c-primary-dark: #0d4fc4;
  --c-primary-deep: #0a1f44;
  --c-accent: #22d3ee;
  /* 中性色 */
  --c-text: #1e293b;
  --c-text-sub: #64748b;
  --c-bg: #ffffff;
  --c-bg-soft: #f5f8ff;
  --c-border: #e2e8f0;
  /* 渐变 */
  --g-hero: linear-gradient(135deg, #0a1f44 0%, #0d3b8f 55%, #1a6cf0 120%);
  --g-btn: linear-gradient(135deg, #1a6cf0, #0d4fc4);
  --g-icon: linear-gradient(135deg, #1a6cf0, #22d3ee);
  /* 圆角与投影 */
  --r-card: 16px;
  --r-btn: 24px;
  --shadow-card: 0 4px 16px rgba(15, 42, 90, 0.06);
  --shadow-card-hover: 0 12px 32px rgba(26, 108, 240, 0.16);
  /* 动效（全站统一节奏） */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-pop: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-in: 500ms;
  --dur-hover: 220ms;
  --dur-drawer: 300ms;
  /* 布局 */
  --container: min(1200px, 92vw);
  --section-gap: 104px;
  --nav-h: 72px;
}

/* 全局关键帧：扫光 / 极光漂移 / 上下浮动 */
@keyframes sweep {
  to { transform: translateX(240%) skewX(-18deg); }
}

@keyframes aurora-drift {
  from { transform: translate3d(-4%, 0, 0) scale(1); }
  to { transform: translate3d(4%, -3%, 0) scale(1.08); }
}

@keyframes float-y {
  from { transform: translateY(-8px); }
  to { transform: translateY(8px); }
}

/* Ken Burns 呼吸：大图带背景缓慢推近漂移 */
@keyframes kenburns {
  from { transform: scale(1) translate(0, 0); }
  to { transform: scale(1.09) translate(1.6%, -1.4%); }
}

/* 标题逐字入场：上浮 + 去模糊 */
@keyframes char-in {
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

/* ---------- 2. 重置与基础 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    "Helvetica Neue", Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-hover) var(--ease);
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  width: var(--container);
  margin-inline: auto;
}

.section {
  padding-block: var(--section-gap);
}

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

/* ---------- 3. 区块标题（眉题 + 大标题 + 装饰线） ---------- */
.sec-head {
  text-align: center;
  margin-bottom: 56px;
}

.sec-head__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 12px;
}

.sec-head__title {
  font-size: clamp(1.625rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.3;
}

.sec-head__line {
  width: 48px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
  margin: 18px auto 0;
}

/* 装饰线随入场从中心展开（带轻微过冲）；左对齐版从左侧展开 */
html.js .sec-head .sec-head__line {
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.7s var(--ease-pop) 0.18s;
}

html.js .sec-head.is-in .sec-head__line {
  transform: scaleX(1);
}

html.js .sec-head--left .sec-head__line {
  transform-origin: left;
}

.sec-head__desc {
  max-width: 640px;
  margin: 16px auto 0;
  color: var(--c-text-sub);
  font-size: 0.9375rem;
}

.sec-head--left {
  text-align: left;
}

.sec-head--left .sec-head__line {
  margin-inline: 0;
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--r-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: transform var(--dur-hover) var(--ease),
    filter var(--dur-hover) var(--ease),
    background var(--dur-hover) var(--ease),
    box-shadow var(--dur-hover) var(--ease);
}

.btn--primary {
  background: var(--g-btn);
  color: #fff;
  box-shadow: 0 6px 18px rgba(26, 108, 240, 0.35);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn--primary::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -50%;
  width: 40%;
  transform: translateX(-120%) skewX(-18deg);
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  pointer-events: none;
}

.btn--primary:hover::after {
  animation: sweep 0.8s var(--ease);
}

.btn--primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(26, 108, 240, 0.5);
}

.btn--ghost {
  border: 1px solid rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn--outline {
  border: 1px solid var(--c-primary);
  color: var(--c-primary);
}

.btn--outline:hover {
  background: var(--c-primary);
  color: #fff;
}

/* 按下反馈：轻微内缩 */
.btn:active {
  transform: scale(0.96);
}

/* ---------- 5. 导航 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--dur-drawer) var(--ease),
    box-shadow var(--dur-drawer) var(--ease);
}

/* 首页 Hero 为深色，导航默认透明白字；子页头部为深色横幅，同样适用 */
.nav__inner {
  width: var(--container);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav__brand img {
  height: 40px;
  width: auto;
}

.nav__brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav__link {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 6px 0;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 1px;
  background: var(--c-accent);
  transition: width var(--dur-hover) var(--ease);
}

.nav__link:hover,
.nav__link.is-active {
  color: #fff;
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__cta {
  height: 40px;
  padding: 0 18px;
  font-size: 0.875rem;
}

/* 吸顶后：磨砂玻璃深色底 */
.nav.is-scrolled {
  background: rgba(10, 31, 68, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(5, 18, 45, 0.35);
}

/* 汉堡按钮（z-index 高于抽屉，保证打开状态下仍可点击关闭） */
.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  position: relative;
  z-index: 101;
}

.nav__toggle span {
  width: 22px;
  height: 2px;
  border-radius: 1px;
  background: #fff;
  transition: transform var(--dur-drawer) var(--ease),
    opacity var(--dur-drawer) var(--ease);
}

.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 移动端抽屉 */
.nav__mask {
  position: fixed;
  inset: 0;
  background: rgba(5, 15, 35, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-drawer) var(--ease);
  z-index: 98;
}

.nav__mask.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + 48px);
  padding-bottom: 96px;
  background: var(--g-hero);
  color: #fff;
  overflow: hidden;
}

/* 网格线纹理：repeat 平铺，任意分辨率自适应 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

/* 光晕：百分比定位自适应，缓慢漂移呼吸 */
.hero::after {
  content: "";
  position: absolute;
  width: 60%;
  aspect-ratio: 1;
  right: -12%;
  top: -30%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.22) 0%, transparent 62%);
  animation: aurora-drift 9s var(--ease) infinite alternate;
  pointer-events: none;
}

/* 浮动光球：模糊圆斑上下漂浮，营造空间层次 */
.hero__orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__orbs span {
  position: absolute;
  border-radius: 50%;
  filter: blur(46px);
  animation: float-y 7s var(--ease) infinite alternate;
}

.hero__orbs span:nth-child(1) {
  width: 220px;
  height: 220px;
  left: 6%;
  bottom: 8%;
  background: rgba(26, 108, 240, 0.32);
}

.hero__orbs span:nth-child(2) {
  width: 150px;
  height: 150px;
  left: 42%;
  top: 14%;
  background: rgba(34, 211, 238, 0.2);
  animation-duration: 9s;
  animation-delay: -3s;
}

.hero__orbs span:nth-child(3) {
  width: 110px;
  height: 110px;
  right: 24%;
  bottom: 16%;
  background: rgba(125, 211, 252, 0.24);
  animation-duration: 8s;
  animation-delay: -5s;
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: var(--container);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 24px;
}

.hero__tag::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 8px var(--c-accent);
  animation: dot-pulse 2.2s var(--ease) infinite;
}

@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 4px var(--c-accent); }
  50% { box-shadow: 0 0 14px var(--c-accent), 0 0 30px rgba(34, 211, 238, 0.5); }
}

.hero__title {
  font-size: clamp(1.875rem, 4.2vw, 3.25rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(90deg, #22d3ee, #7dd3fc, #a78bfa, #22d3ee);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradient-flow 6s linear infinite;
}

/* 逐字入场：main.js 将标题拆为 .hero__char 并写入 --i 序号；未拆分时无影响 */
.hero__char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.55em);
  filter: blur(5px);
  animation: char-in 0.55s var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 26ms + 0.12s);
}

@keyframes gradient-flow {
  to { background-position: 220% center; }
}

.hero__desc {
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  color: rgba(255, 255, 255, 0.78);
  max-width: 540px;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 玻璃信息卡 */
.hero__facts {
  display: flex;
  gap: 28px;
  margin-top: 44px;
  padding: 20px 28px;
  border-radius: var(--r-card);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.07);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  width: fit-content;
}

.hero__fact strong {
  display: block;
  font-size: 1.375rem;
  color: var(--c-accent);
  line-height: 1.3;
}

.hero__fact span {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
}

.hero__visual {
  position: relative;
  aspect-ratio: 4 / 3;
  animation: float-y 6s var(--ease) infinite alternate;
}

/* 旋转渐变光环：衬于主视觉图后方 */
.hero__visual::before {
  content: "";
  position: absolute;
  inset: -16px;
  border-radius: 24px;
  background: conic-gradient(from 0deg, rgba(26, 108, 240, 0.55), rgba(34, 211, 238, 0.12), rgba(125, 211, 252, 0.5), rgba(26, 108, 240, 0.55));
  filter: blur(22px);
  opacity: 0.55;
  z-index: -1;
  animation: ring-spin 14s linear infinite;
}

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

.hero__visual img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--r-card);
  box-shadow: 0 24px 60px rgba(4, 16, 40, 0.45);
}

/* 子页通用深色页头横幅：各页通过内联 background-image 指定专属大图（
   内联声明才能按页面路径解析相对图片），此处为无图时的回退外观 */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 72px) 0 72px;
  background-color: var(--c-primary-deep);
  background-image: linear-gradient(rgba(7, 18, 42, 0.72), rgba(10, 31, 68, 0.86));
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #fff;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

/* 极光漂移：与首页反向布局，避免子页页头与首页 Hero 完全同脸 */
.page-hero::after {
  content: "";
  position: absolute;
  width: 54%;
  aspect-ratio: 1;
  left: -14%;
  top: -46%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.16) 0%, transparent 62%);
  animation: aurora-drift 11s var(--ease) infinite alternate-reverse;
  pointer-events: none;
}

/* 主题光球：main.js 按页面注入，不同业务页不同色系 */
.page-hero__orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-hero__orbs span {
  position: absolute;
  border-radius: 50%;
  filter: blur(42px);
  animation: float-y 8s var(--ease) infinite alternate;
}

.page-hero__orbs span:nth-child(1) {
  width: 190px;
  height: 190px;
  right: 8%;
  top: -40px;
}

.page-hero__orbs span:nth-child(2) {
  width: 120px;
  height: 120px;
  left: 10%;
  bottom: -36px;
  animation-duration: 10s;
  animation-delay: -3s;
}

.page-hero__orbs span:nth-child(3) {
  width: 90px;
  height: 90px;
  left: 46%;
  top: 10%;
  animation-duration: 9s;
  animation-delay: -5s;
}

/* 页头文字入场节奏：面包屑 → 标题 → 描述 依次上浮（JS 门控） */
@keyframes hero-line-in {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

html.js .page-hero__crumb,
html.js .page-hero__title,
html.js .page-hero__desc {
  animation: hero-line-in 0.6s var(--ease) both;
}

html.js .page-hero__title {
  animation-delay: 0.1s;
}

html.js .page-hero__desc {
  animation-delay: 0.2s;
}

.page-hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-hero__crumb {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
}

.page-hero__crumb a:hover {
  color: var(--c-accent);
}

.page-hero__title {
  font-size: clamp(1.625rem, 3vw, 2.375rem);
  font-weight: 700;
}

.page-hero__desc {
  max-width: 620px;
  margin: 14px auto 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9375rem;
}

/* ---------- 7. 卡片基座 ---------- */
.card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-hover) var(--ease),
    box-shadow var(--dur-hover) var(--ease),
    border-color var(--dur-hover) var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(26, 108, 240, 0.45);
}

/* 悬停扫光：一道白色流光斜向划过卡面 */
.card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -10%;
  width: 36%;
  transform: translateX(-130%) skewX(-18deg);
  background: linear-gradient(105deg, transparent, rgba(26, 108, 240, 0.09), rgba(34, 211, 238, 0.14), transparent);
  opacity: 0;
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
  animation: sweep 0.9s var(--ease);
}

/* 鼠标聚光灯：跟随指针的径向光斑（main.js 设置 --mx/--my，触屏不启用） */
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(26, 108, 240, 0.1), transparent 65%);
  opacity: 0;
  transition: opacity var(--dur-hover) var(--ease);
  pointer-events: none;
}

html:not(.touch) .card:hover::after {
  opacity: 1;
}

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

/* 图标底座 */
.icon-badge {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--g-icon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 20px;
  flex: none;
}

.icon-badge svg {
  width: 28px;
  height: 28px;
}

/* ---------- 8. 网格布局 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

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

/* ---------- 9. 业务卡片 ---------- */
.biz-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.biz-card__desc {
  font-size: 0.9063rem;
  color: var(--c-text-sub);
  margin-bottom: 18px;
}

.biz-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
}

.biz-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--c-text);
}

.biz-card__list li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--g-icon);
  margin-top: 9px;
  flex: none;
}

.biz-card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9063rem;
  font-weight: 600;
  color: var(--c-primary);
}

/* 箭头随悬停向右轻推 */
.biz-card__more svg {
  transition: transform var(--dur-hover) var(--ease);
}

.biz-card__more:hover svg {
  transform: translateX(4px);
}

.biz-card__more svg {
  width: 16px;
  height: 16px;
  transition: transform var(--dur-hover) var(--ease);
}

.biz-card__more:hover svg {
  transform: translateX(4px);
}

/* ---------- 10. 数据区 ---------- */
.stats {
  background: var(--c-primary-deep);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.stats::after {
  content: "";
  position: absolute;
  width: 46%;
  aspect-ratio: 1;
  left: -10%;
  bottom: -50%;
  background: radial-gradient(circle, rgba(26, 108, 240, 0.35) 0%, transparent 62%);
  animation: aurora-drift 8s var(--ease) infinite alternate;
  pointer-events: none;
}

.stats::before {
  content: "";
  position: absolute;
  width: 40%;
  aspect-ratio: 1;
  right: -8%;
  top: -60%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.18) 0%, transparent 62%);
  animation: aurora-drift 10s var(--ease) infinite alternate-reverse;
  pointer-events: none;
}

.stats__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stats__num {
  font-size: clamp(2rem, 3.4vw, 2.875rem);
  font-weight: 700;
  line-height: 1.2;
  background: linear-gradient(90deg, #7dd3fc, #22d3ee, #7dd3fc);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-variant-numeric: tabular-nums;
  animation: gradient-flow 5s linear infinite;
  filter: drop-shadow(0 0 14px rgba(34, 211, 238, 0.28));
}

.stats__label {
  margin-top: 6px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 10.5 全宽大图展示带 ---------- */
.showcase {
  position: relative;
  overflow: hidden;
  min-height: clamp(360px, 42vw, 560px);
  display: flex;
  align-items: center;
  background: var(--c-primary-deep);
}

.showcase__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: kenburns 20s var(--ease) infinite alternate;
}

.showcase__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 31, 68, 0.58), rgba(10, 31, 68, 0.2) 45%, rgba(10, 31, 68, 0.62));
}

.showcase__inner {
  position: relative;
  z-index: 1;
  padding: 76px 0;
  text-align: center;
  color: #fff;
}

.showcase__title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  text-shadow: 0 2px 18px rgba(5, 18, 45, 0.55);
  margin-bottom: 14px;
}

.showcase__desc {
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(0.875rem, 1.3vw, 1rem);
  text-shadow: 0 1px 10px rgba(5, 18, 45, 0.5);
  margin-bottom: 30px;
}

/* ---------- 11. 优势卡片 ---------- */
.adv-card {
  text-align: center;
  padding: 40px 24px;
}

.adv-card .icon-badge {
  margin-inline: auto;
}

.adv-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.adv-card__desc {
  font-size: 0.875rem;
  color: var(--c-text-sub);
}

/* ---------- 12. 案例卡片 ---------- */
.case-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.case-card__cover {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.case-card:hover .case-card__cover img,
.case-card:hover .ph-cover__mark {
  transform: scale(1.06);
}

.ph-cover__mark {
  transition: transform 0.5s var(--ease);
}

/* CSS 渐变占位封面 */
.ph-cover {
  background: linear-gradient(135deg, var(--ph-a, #0d3b8f), var(--ph-b, #1a6cf0));
}

.ph-cover__mark {
  font-size: 3.5rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.04em;
}

.ph-cover__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 40px 40px;
}

.case-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.case-card__tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(26, 108, 240, 0.1);
  border-radius: 999px;
  padding: 3px 12px;
}

.case-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
}

.case-card__desc {
  font-size: 0.875rem;
  color: var(--c-text-sub);
}

/* 案例筛选按钮 */
.filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filters__btn {
  height: 40px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  color: var(--c-text-sub);
  font-size: 0.875rem;
  transition: all var(--dur-hover) var(--ease);
}

.filters__btn:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.filters__btn.is-active {
  background: var(--g-btn);
  border-color: transparent;
  color: #fff;
}

.case-grid.is-hidden {
  display: none;
}

/* ---------- 13. 服务流程 ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
}

.process__step {
  position: relative;
  text-align: center;
  padding: 32px 16px 28px;
}

.process__step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--g-icon);
  color: #fff;
  font-size: 1.0625rem;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(26, 108, 240, 0.3);
}

/* 连接线（桌面） */
.process__step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 58px;
  left: calc(50% + 40px);
  width: calc(100% - 80px);
  border-top: 2px dashed rgba(26, 108, 240, 0.35);
}

.process__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.process__desc {
  font-size: 0.8125rem;
  color: var(--c-text-sub);
}

/* ---------- 14. 新闻卡片 ---------- */
.news-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.news-card__cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
}

.news-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.news-card:hover .news-card__cover img {
  transform: scale(1.06);
}

.news-card__body {
  padding: 22px 24px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.news-card__date {
  font-size: 0.7813rem;
  color: var(--c-text-sub);
  display: flex;
  align-items: center;
  gap: 10px;
}

.news-card__cat {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(26, 108, 240, 0.1);
  border-radius: 999px;
  padding: 2px 10px;
}

.news-card__title {
  font-size: 1.0313rem;
  font-weight: 700;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card:hover .news-card__title {
  color: var(--c-primary);
}

.news-card__excerpt {
  font-size: 0.8563rem;
  color: var(--c-text-sub);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 15. 咨询 CTA 区 ---------- */
.cta-band {
  background: var(--g-hero);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  width: 50%;
  aspect-ratio: 1;
  left: 50%;
  top: -60%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(34, 211, 238, 0.18) 0%, transparent 60%);
  animation: aurora-drift 9s var(--ease) infinite alternate;
  pointer-events: none;
}

.cta-band::after {
  content: "";
  position: absolute;
  width: 42%;
  aspect-ratio: 1;
  left: -10%;
  bottom: -70%;
  background: radial-gradient(circle, rgba(26, 108, 240, 0.4) 0%, transparent 62%);
  animation: aurora-drift 11s var(--ease) infinite alternate-reverse;
  pointer-events: none;
}

.cta-band__title {
  position: relative;
  font-size: clamp(1.375rem, 2.6vw, 1.875rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-band__desc {
  position: relative;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9375rem;
  margin-bottom: 32px;
}

.cta-band__actions {
  position: relative;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 16. 咨询表单 ---------- */
.form-card {
  max-width: 720px;
  margin-inline: auto;
}

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

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.form-field label {
  font-size: 0.875rem;
  font-weight: 600;
}

.form-field input,
.form-field textarea,
.form-field select {
  font: inherit;
  font-size: 0.9063rem;
  color: var(--c-text);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--c-bg);
  transition: border-color var(--dur-hover) var(--ease),
    box-shadow var(--dur-hover) var(--ease);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(26, 108, 240, 0.14);
}

.form-field textarea {
  resize: vertical;
  min-height: 110px;
}

.form-note {
  font-size: 0.7813rem;
  color: var(--c-text-sub);
  margin-top: 14px;
}

/* ---------- 17. 页脚 ---------- */
.footer {
  background: var(--c-primary-deep);
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.875rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 0.9fr;
  gap: 48px;
  padding: 72px 0 56px;
}

.footer__brand img {
  height: 40px;
  margin-bottom: 18px;
}

.footer__brand p {
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.8438rem;
  max-width: 300px;
}

.footer__h {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__links a:hover {
  color: var(--c-accent);
}

.footer__contact li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.footer__contact svg {
  width: 17px;
  height: 17px;
  flex: none;
  margin-top: 4px;
  color: var(--c-accent);
}

.footer__qr {
  width: 120px;
  height: 120px;
  border-radius: 12px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-sub);
  font-size: 0.75rem;
  text-align: center;
  padding: 8px;
}

.footer__qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
  text-align: center;
  font-size: 0.7813rem;
  color: rgba(255, 255, 255, 0.5);
}

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

.footer__bottom a:hover {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- 18. 悬浮咨询按钮 ---------- */
.float-consult {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 90;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--g-btn);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(26, 108, 240, 0.45);
  transition: transform var(--dur-hover) var(--ease);
}

.float-consult:hover {
  transform: translateY(-3px);
}

/* 呼吸脉冲环：引导视线至咨询入口 */
.float-consult::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(26, 108, 240, 0.55);
  animation: ping 2.4s var(--ease) infinite;
  pointer-events: none;
}

@keyframes ping {
  0% { transform: scale(1); opacity: 0.7; }
  80%, 100% { transform: scale(1.65); opacity: 0; }
}

.float-consult svg {
  width: 24px;
  height: 24px;
}

/* ---------- 19. 滚动入场动画（JS 门控，无 JS 不隐藏） ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-in) var(--ease), transform var(--dur-in) var(--ease);
}

/* 入场方向变体：左滑入 / 右滑入 / 缩放弹出（避免全站同一种入场） */
html.js [data-reveal="left"] {
  transform: translateX(-44px);
}

html.js [data-reveal="right"] {
  transform: translateX(44px);
}

html.js [data-reveal="zoom"] {
  transform: scale(0.9);
  transition: opacity var(--dur-in) var(--ease), transform var(--dur-in) var(--ease-pop);
}

html.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* 入场完成后悬停仍可驱动 transform：特异性需高于上方 .is-in，
   否则卡片/按钮入场后悬停位移会被 transform:none 压死 */
html.js .card:hover {
  transform: translateY(-4px);
}

/* 3D 倾斜：main.js 随指针设置 --rx/--ry（仅非触屏），悬停时卡片微倾朝向光标 */
html.js:not(.touch) .card:hover {
  transform: perspective(900px) translateY(-4px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

/* 交错延迟 */
html.js [data-reveal-delay="1"] { transition-delay: 90ms; }
html.js [data-reveal-delay="2"] { transition-delay: 180ms; }
html.js [data-reveal-delay="3"] { transition-delay: 270ms; }

/* ---------- 20. 时间线（关于我们） ---------- */
.timeline {
  position: relative;
  max-width: 760px;
  margin-inline: auto;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--c-primary), var(--c-accent));
}

.timeline__item {
  position: relative;
  padding-bottom: 36px;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--c-primary);
}

.timeline__year {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-primary);
}

.timeline__title {
  font-weight: 600;
  margin: 2px 0 4px;
}

.timeline__desc {
  font-size: 0.875rem;
  color: var(--c-text-sub);
}

/* ---------- 21. 文章排版（新闻详情） ---------- */
.article {
  max-width: 780px;
  margin-inline: auto;
}

.article__meta {
  text-align: center;
  color: var(--c-text-sub);
  font-size: 0.8438rem;
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--c-border);
}

.article h2 {
  font-size: 1.375rem;
  margin: 40px 0 14px;
}

.article p {
  margin-bottom: 16px;
  color: var(--c-text);
}

.article ul {
  margin: 0 0 16px 22px;
  list-style: disc;
}

/* ---------- 22. 合作伙伴区与手机模型 ---------- */
.partners__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

.partners__item {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 12px 22px;
  filter: grayscale(1);
  opacity: 0.78;
  transition: all var(--dur-hover) var(--ease);
}

.partners__item:hover {
  filter: none;
  opacity: 1;
  border-color: rgba(26, 108, 240, 0.4);
}

.partners__item img {
  height: 40px;
  width: auto;
}

/* 跑马灯模式（main.js 克隆一组子项后启用）：两侧渐隐遮罩 + 无缝滚动 */
.partners-mask {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}

.partners__grid.is-marquee {
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-start;
  gap: 0;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.partners__grid.is-marquee .partners__item {
  flex: none;
  margin-right: 20px;
}

.partners__grid.is-marquee:hover {
  animation-play-state: paused;
}

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

/* 顶部滚动进度条（main.js 动态创建，GPU 合成 scaleX） */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 130;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
  pointer-events: none;
}

/* 手机模型（小程序页）：纯 CSS 外框 + 屏内图 */
.phone-mockup {
  width: 292px;
  margin-inline: auto;
  background: #0f172a;
  border-radius: 42px;
  padding: 12px;
  box-shadow: 0 30px 60px rgba(10, 31, 68, 0.35),
    inset 0 0 0 2px rgba(255, 255, 255, 0.08);
  position: relative;
}

.phone-mockup::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 84px;
  height: 22px;
  border-radius: 12px;
  background: #0f172a;
  z-index: 2;
}

.phone-mockup__screen {
  border-radius: 32px;
  overflow: hidden;
  aspect-ratio: 4 / 7;
  background: #fff;
}

.phone-mockup__screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 23. 业务详情页：图文分栏与清单 ---------- */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.split--rev .split__media { order: -1; }

.split__media {
  border-radius: var(--r-card);
  overflow: hidden;
  box-shadow: var(--shadow-card-hover);
  aspect-ratio: 5 / 4;
}

.split__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.split__title {
  font-size: clamp(1.375rem, 2.4vw, 1.75rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.split__desc {
  color: var(--c-text-sub);
  font-size: 0.9563rem;
  margin-bottom: 24px;
}

.check-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
  margin-bottom: 28px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9063rem;
}

.check-list li::before {
  content: "";
  width: 18px;
  height: 18px;
  margin-top: 4px;
  flex: none;
  border-radius: 50%;
  background: var(--g-icon);
  -webkit-mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18"><path d="M4 9.5l3 3 7-7" fill="none" stroke="black" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>') center / 12px no-repeat;
  mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18"><path d="M4 9.5l3 3 7-7" fill="none" stroke="black" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>') center / 12px no-repeat;
}

/* 服务内容卡（编号角标） */
.svc-card {
  position: relative;
  padding-top: 40px;
}

.svc-card__num {
  position: absolute;
  top: 20px;
  right: 22px;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, rgba(26, 108, 240, 0.18), rgba(34, 211, 238, 0.18));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.svc-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.svc-card__desc {
  font-size: 0.8563rem;
  color: var(--c-text-sub);
}

/* 适用场景标签 */
.scene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.scene-tags span {
  padding: 12px 26px;
  border-radius: 999px;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  font-size: 0.9063rem;
  color: var(--c-text);
  transition: all var(--dur-hover) var(--ease);
}

.scene-tags span:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  box-shadow: 0 6px 16px rgba(26, 108, 240, 0.12);
}

/* 对比表（GEO vs SEO） */
.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9063rem;
}

.compare th,
.compare td {
  padding: 14px 18px;
  border: 1px solid var(--c-border);
  text-align: left;
}

.compare thead th {
  background: var(--c-primary-deep);
  color: #fff;
  font-weight: 600;
}

.compare tbody th {
  background: var(--c-bg-soft);
  font-weight: 600;
  white-space: nowrap;
}

.compare-wrap {
  overflow-x: auto;
  border-radius: var(--r-card);
  border: 1px solid var(--c-border);
}

/* ---------- 23. 响应式：平板（≤1024px） ---------- */
@media (max-width: 1024px) {
  :root {
    --section-gap: 84px;
  }

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

  .split--rev .split__media { order: 0; }

  .split__media {
    max-width: 560px;
  }

  .check-list {
    grid-template-columns: 1fr;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(300px, 82vw);
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: calc(var(--nav-h) + 20px) 28px 28px;
    background: #0a1f44;
    transform: translateX(100%);
    transition: transform var(--dur-drawer) var(--ease);
    z-index: 100;
  }

  .nav__menu.is-open {
    transform: translateX(0);
  }

  .nav__link {
    width: 100%;
    padding: 12px 0;
    font-size: 1rem;
  }

  .nav__cta {
    margin-top: 16px;
  }

  .nav__toggle {
    display: flex;
  }

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

  .hero__visual {
    max-width: 560px;
  }

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

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 40px;
  }

  .process {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
    gap: 0;
  }

  .process__step {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 18px;
    text-align: left;
    padding: 0 0 36px;
  }

  .process__step::before {
    margin: 0;
  }

  .process__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 56px;
    left: 25px;
    bottom: 2px;
    width: auto;
    border-top: none;
    border-left: 2px dashed rgba(26, 108, 240, 0.35);
  }

  .process__text {
    padding-top: 10px;
  }

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

/* ---------- 23. 响应式：手机（≤768px） ---------- */
@media (max-width: 768px) {
  :root {
    --section-gap: 64px;
    --r-card: 12px;
    --nav-h: 60px;
  }

  /* 移动端导航关闭磨砂，改纯色底，保证低端机流畅 */
  .nav.is-scrolled {
    background: #0a1f44;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .hero {
    min-height: 0;
    padding-top: calc(var(--nav-h) + 40px);
    padding-bottom: 64px;
  }

  .hero__facts {
    flex-wrap: wrap;
    gap: 18px;
    padding: 16px 20px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 24px 20px;
    box-shadow: 0 2px 8px rgba(15, 42, 90, 0.05);
  }

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

  .footer__grid {
    grid-template-columns: 1fr;
    padding: 56px 0 40px;
  }

  .phone-mockup {
    width: 248px;
  }

  .float-consult {
    right: 16px;
    bottom: 20px;
  }

  /* 移动端入场动画缩短 */
  html.js [data-reveal] {
    transition-duration: 200ms;
    transform: translateY(14px);
  }

  /* 移动端光球缩小、降低模糊半径，保证低端机流畅 */
  .hero__orbs span {
    filter: blur(30px);
  }

  .hero__orbs span:nth-child(1) { width: 130px; height: 130px; }
  .hero__orbs span:nth-child(2) { width: 90px; height: 90px; }
  .hero__orbs span:nth-child(3) { width: 70px; height: 70px; }
}

/* ---------- 24. 响应式：大屏（≥1920px，含 2K） ---------- */
@media (min-width: 1920px) {
  html {
    font-size: 17px;
  }

  :root {
    --container: min(1440px, 92vw);
    --section-gap: 128px;
    --nav-h: 80px;
  }

  .hero {
    min-height: 100svh;
  }

  .grid--3.grid--lg4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .sec-head {
    margin-bottom: 72px;
  }

  .phone-mockup {
    width: 330px;
  }
}

/* ---------- 25. 响应式：4K（≥2560px） ---------- */
@media (min-width: 2560px) {
  html {
    font-size: 18px;
  }

  :root {
    --container: min(1600px, 90vw);
    --section-gap: 148px;
  }
}

/* ---------- 26. 减弱动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card:hover,
  .btn--primary:hover,
  .float-consult:hover {
    transform: none;
  }

  /* 关闭所有循环装饰动画 */
  .hero::after,
  .hero__orbs span,
  .hero__title em,
  .hero__char,
  .hero__tag::before,
  .hero__visual,
  .hero__visual::before,
  .page-hero::after,
  .page-hero__orbs span,
  html.js .page-hero__crumb,
  html.js .page-hero__title,
  html.js .page-hero__desc,
  .stats::before,
  .stats::after,
  .stats__num,
  .showcase__bg,
  .cta-band::before,
  .cta-band::after,
  .float-consult::before,
  .partners__grid.is-marquee,
  .card:hover::before,
  .btn--primary:hover::after {
    animation: none;
  }

  .hero__char {
    opacity: 1;
    transform: none;
    filter: none;
  }

  html.js .sec-head .sec-head__line {
    transform: none;
    transition: none;
  }

  html.js .card:hover,
  html.js:not(.touch) .card:hover {
    transform: none;
  }
}