/* ============================================================
   云创律科 - 智能化法律AI生态构建者
   全站样式 · 深色科技风设计系统
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 色板 */
  --bg: #0f1923;
  --bg-card: #162232;
  --border: #2a3f55;
  --tech: #00d4ff;
  --tech-dark: #0099cc;
  --navy: #1b3a5c;
  --gold: #c9a961;
  --text: #e8edf2;
  --text-dim: #8899aa;
  --success: #22c55e;
  --danger: #ef4444;

  /* 渐变 */
  --grad-hero: linear-gradient(135deg, #0f1923, #1b3a5c, #0f2847);
  --grad-partner: linear-gradient(135deg, #1b3a5c, #0f2847 55%, #00d4ff 140%);
  --grad-text: linear-gradient(90deg, #00d4ff, #0099cc);

  /* 玻璃拟态 */
  --glass-bg: rgba(22, 34, 50, 0.55);
  --glass-bg-strong: rgba(15, 25, 35, 0.92);

  /* 动效 */
  --dur: 0.3s;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;

  /* 阴影 */
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 12px 28px rgba(0, 212, 255, 0.18);
  --shadow-glow-sm: 0 0 22px rgba(0, 212, 255, 0.35);
  --shadow-gold: 0 10px 26px rgba(201, 169, 97, 0.15);

  /* 布局 */
  --header-h: 80px;
  --container: 1200px;

  /* 字体:系统栈,无外链 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

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

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

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

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

ul {
  list-style: none;
}

::selection {
  background: rgba(0, 212, 255, 0.3);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: #3a5673;
}

:focus-visible {
  outline: 2px solid var(--tech);
  outline-offset: 2px;
}

/* ---------- 3. 工具类 ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
@media (min-width: 1024px) {
  .container {
    padding: 0 32px;
  }
}

.section {
  padding: 80px 0;
}
@media (min-width: 1024px) {
  .section {
    padding: 120px 0;
  }
}

.section--card {
  background: var(--bg-card);
  position: relative;
}
.section--card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.25), transparent);
}

.section--grad {
  background: var(--grad-partner);
  position: relative;
}

/* 分区标题 */
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-head--left {
  text-align: left;
  margin: 0 0 48px;
}
.section-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--tech);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-head__eyebrow::before,
.section-head__eyebrow::after {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--tech));
}
.section-head__eyebrow::after {
  background: linear-gradient(90deg, var(--tech), transparent);
}
.section-head__title {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.section-head__sub {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
}
@media (min-width: 1024px) {
  .section-head {
    margin-bottom: 64px;
  }
  .section-head__title {
    font-size: 32px;
  }
  .section-head__sub {
    font-size: 16px;
  }
}

/* 渐变文字 + shimmer */
.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}
@keyframes shimmer {
  0% {
    background-position: 0% center;
  }
  100% {
    background-position: -200% center;
  }
}

/* 网格纹理(纯 CSS 无图片) */
.grid-pattern {
  background-image: linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ---------- 4. 滚动进场体系 ---------- */
.reveal {
  opacity: 0;
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.reveal--up {
  transform: translateY(36px);
}
.reveal--left {
  transform: translateX(-44px);
}
.reveal--right {
  transform: translateX(44px);
}
.reveal--zoom {
  transform: scale(0.9);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
/* JS 不可用时全部直接可见 */
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* ---------- 5. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: var(--glass-bg-strong);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
@media (min-width: 1024px) {
  .site-header__inner {
    height: var(--header-h);
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand__logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.25);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.brand:hover .brand__logo {
  transform: scale(1.05) rotate(-4deg);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.45);
}
.brand__name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.06em;
}
@media (max-width: 639px) {
  .brand__name {
    display: none;
  }
}

.site-nav {
  display: none;
  align-items: center;
  gap: 30px;
}
@media (min-width: 1024px) {
  .site-nav {
    display: flex;
  }
}
.site-nav__cta {
  display: none;
}
@media (min-width: 1024px) {
  .site-nav__cta {
    display: block;
  }
}
.site-nav__link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  padding: 6px 0;
  transition: color 0.25s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 1px;
  background: var(--grad-text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--tech);
}
.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
}

/* 汉堡按钮 */
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  border-radius: var(--r-sm);
  transition: background 0.25s var(--ease);
}
.hamburger:hover {
  background: rgba(0, 212, 255, 0.08);
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }
}

/* 移动端全屏抽屉 */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--glass-bg-strong);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
}
.mobile-drawer.is-open {
  transform: translateX(0);
}
.mobile-drawer__nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  max-width: 360px;
  padding: 24px;
}
.mobile-drawer__link {
  display: block;
  padding: 14px 18px;
  border-radius: var(--r-md);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-dim);
  text-align: center;
  transition: all 0.25s var(--ease);
  opacity: 0;
  transform: translateX(24px);
}
.mobile-drawer.is-open .mobile-drawer__link {
  opacity: 1;
  transform: none;
  transition: all 0.35s var(--ease);
  transition-delay: calc(0.08s + var(--i, 0) * 0.05s);
}
.mobile-drawer__link:hover,
.mobile-drawer__link.is-active {
  color: var(--tech);
  background: rgba(0, 212, 255, 0.08);
}
.mobile-drawer__cta {
  display: block;
  margin-top: 14px;
  padding: 13px 18px;
  border-radius: var(--r-md);
  background: var(--tech);
  color: var(--bg);
  font-weight: 600;
  text-align: center;
  opacity: 0;
  transform: translateX(24px);
}
.mobile-drawer.is-open .mobile-drawer__cta {
  opacity: 1;
  transform: none;
  transition: all 0.35s var(--ease);
  transition-delay: calc(0.08s + 8 * 0.05s);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  border-radius: var(--r-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
  transition: all 0.28s var(--ease);
  position: relative;
  overflow: hidden;
}
.btn--primary {
  background: var(--tech);
  color: var(--bg);
  box-shadow: 0 4px 18px rgba(0, 212, 255, 0.25);
}
.btn--primary:hover {
  background: #22ddff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 212, 255, 0.45);
}
.btn--primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  transition: left 0.5s var(--ease);
}
.btn--primary:hover::after {
  left: 130%;
}
.btn--outline {
  border: 1px solid rgba(0, 212, 255, 0.5);
  color: var(--tech);
  background: transparent;
}
.btn--outline:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--tech);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
}
.btn--lg {
  padding: 15px 34px;
  font-size: 16px;
}
.btn__arrow {
  transition: transform 0.28s var(--ease);
}
.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ---------- 7. 卡片与徽章 ---------- */
.card {
  position: relative;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 12%;
  right: 12%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.5), transparent);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.card--hover:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.45);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}
.card--hover:hover::before {
  opacity: 1;
}
.card--gold {
  border-color: rgba(201, 169, 97, 0.25);
}
.card--gold:hover {
  border-color: rgba(201, 169, 97, 0.55);
  box-shadow: var(--shadow-gold), var(--shadow-card);
}
.card--gold::before {
  background: linear-gradient(90deg, transparent, rgba(201, 169, 97, 0.55), transparent);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
}
.badge--tech {
  background: rgba(0, 212, 255, 0.1);
  color: var(--tech);
}
.badge--gold {
  background: rgba(201, 169, 97, 0.1);
  color: var(--gold);
}
.badge--dim {
  background: rgba(42, 63, 85, 0.5);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* ---------- 8. 首页 Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-hero);
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero__grid {
  position: absolute;
  inset: 0;
  opacity: 0.4;
}
.hero__grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 30%, var(--bg) 100%);
}
/* 星空点阵(纯 CSS) */
.hero__stars {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(1.5px 1.5px at 18% 24%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 34% 68%, rgba(0, 212, 255, 0.5), transparent),
    radial-gradient(1.5px 1.5px at 52% 16%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1px 1px at 66% 44%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1.5px 1.5px at 78% 76%, rgba(0, 212, 255, 0.45), transparent),
    radial-gradient(1px 1px at 88% 28%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 8% 52%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1.5px 1.5px at 44% 88%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 94% 58%, rgba(0, 212, 255, 0.4), transparent),
    radial-gradient(1px 1px at 26% 8%, rgba(255, 255, 255, 0.3), transparent);
  background-size: 100% 100%;
  animation: twinkle 5s ease-in-out infinite alternate;
}
@keyframes twinkle {
  0% {
    opacity: 0.55;
  }
  100% {
    opacity: 1;
  }
}
/* 光球:外层漂浮 + 内层视差 */
.hero__orb-wrap {
  position: absolute;
  pointer-events: none;
}
.hero__orb-wrap--1 {
  top: 18%;
  left: 14%;
  animation: float-1 9s ease-in-out infinite;
}
.hero__orb-wrap--2 {
  bottom: 14%;
  right: 10%;
  animation: float-2 11s ease-in-out infinite;
}
@keyframes float-1 {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(28px, 20px);
  }
}
@keyframes float-2 {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-24px, -22px);
  }
}
.hero__orb {
  width: 360px;
  height: 360px;
  border-radius: 50%;
  filter: blur(90px);
  transform: translate(var(--mx, 0px), var(--my, 0px));
  transition: transform 0.6s var(--ease);
}
.hero__orb--tech {
  background: rgba(0, 212, 255, 0.12);
  animation: glow-pulse 4s ease-in-out infinite;
}
.hero__orb--navy {
  background: rgba(27, 58, 92, 0.4);
  width: 300px;
  height: 300px;
}
@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.7;
    transform: scale(1) translate(var(--mx, 0px), var(--my, 0px));
  }
  50% {
    opacity: 1;
    transform: scale(1.08) translate(var(--mx, 0px), var(--my, 0px));
  }
}

.hero__content {
  position: relative;
  z-index: 10;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}
@media (min-width: 1024px) {
  .hero__content {
    padding: 0 32px;
  }
}
/* 首屏阶梯入场 */
[data-hero-anim] {
  opacity: 0;
  animation: hero-in 0.9s var(--ease) forwards;
  animation-delay: var(--d, 0ms);
}
@keyframes hero-in {
  from {
    opacity: 0;
    transform: translateY(34px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.hero__title {
  font-size: clamp(30px, 4.6vw, 56px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.hero__slogan {
  color: var(--text-dim);
  font-size: clamp(15px, 1.6vw, 19px);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.9;
}
.hero__actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  justify-content: center;
}
@media (min-width: 640px) {
  .hero__actions {
    flex-direction: row;
  }
}
.hero__stats {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 1024px) {
  .hero__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 72px;
  }
}
.hero__stat-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--tech);
  text-shadow: 0 0 24px rgba(0, 212, 255, 0.4);
}
@media (min-width: 1024px) {
  .hero__stat-num {
    font-size: 30px;
  }
}
.hero__stat-label {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}
/* 滚动提示 */
.hero__scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 0.2em;
  animation: hero-in 1s var(--ease) 1.1s both;
}
.hero__scroll-hint::after {
  content: "";
  width: 1px;
  height: 34px;
  background: linear-gradient(180deg, var(--tech), transparent);
  animation: scroll-line 2s var(--ease) infinite;
}
@keyframes scroll-line {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  51% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* ---------- 9. 内页页头 ---------- */
.page-hero {
  background: var(--grad-hero);
  position: relative;
  overflow: hidden;
  padding: 120px 0 64px;
  text-align: center;
}
.page-hero .grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.35;
}
.page-hero__inner {
  position: relative;
  z-index: 2;
}
.page-hero__title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 0.03em;
  margin-bottom: 14px;
}
.page-hero__sub {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 620px;
  margin: 0 auto;
}
@media (min-width: 1024px) {
  .page-hero {
    padding: 160px 0 96px;
  }
  .page-hero__title {
    font-size: 40px;
  }
  .page-hero__sub {
    font-size: 16px;
  }
}

/* ---------- 10. 数据计数卡 ---------- */
.stat-card {
  padding: 28px 20px;
  text-align: center;
  background: rgba(15, 25, 35, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
.stat-card__num {
  font-size: 30px;
  font-weight: 700;
  color: var(--tech);
  text-shadow: 0 0 22px rgba(0, 212, 255, 0.35);
  font-variant-numeric: tabular-nums;
}
@media (min-width: 1024px) {
  .stat-card {
    padding: 32px;
  }
  .stat-card__num {
    font-size: 36px;
  }
}
.stat-card__label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-dim);
}

/* 资质条目 */
.qual-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: rgba(15, 25, 35, 0.35);
  border: 1px solid rgba(201, 169, 97, 0.2);
  border-radius: var(--r-sm);
  transition: all 0.3s var(--ease);
}
.qual-item:hover {
  border-color: rgba(201, 169, 97, 0.5);
  transform: translateY(-3px);
  box-shadow: var(--shadow-gold);
}
.qual-item__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(201, 169, 97, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--gold);
}
.qual-item__body {
  min-width: 0;
}
.qual-item__title {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.qual-item__number {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- 11. 产品卡 / 工具卡 / 案例卡 ---------- */
.product-card {
  display: block;
  padding: 28px;
}
.product-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--r-md);
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech);
  margin-bottom: 20px;
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease);
}
.product-card:hover .product-card__icon {
  transform: scale(1.12) rotate(-6deg);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
}
.product-card__title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  transition: color 0.25s var(--ease);
}
.product-card:hover .product-card__title {
  color: var(--tech);
}
.product-card__desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
}
.product-card__features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--tech);
  font-size: 14px;
  font-weight: 500;
  transition: gap 0.25s var(--ease);
}
.product-card:hover .product-card__link {
  gap: 12px;
}

.tool-card {
  padding: 26px;
}
.tool-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r-sm);
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech);
  margin-bottom: 20px;
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease);
}
.tool-card:hover .tool-card__icon {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 8px 22px rgba(0, 212, 255, 0.3);
}
.tool-card__title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}
.tool-card__desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

.gold-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 26px;
  border-radius: 999px;
  background: rgba(15, 25, 35, 0.55);
  border: 1px solid rgba(201, 169, 97, 0.35);
  color: var(--gold);
  font-size: 14px;
  font-weight: 500;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 28px rgba(201, 169, 97, 0.12);
}
.gold-pill svg {
  flex-shrink: 0;
}

.case-card {
  padding: 26px;
}
.case-card__badges {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.case-card__title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
  transition: color 0.25s var(--ease);
}
.case-card:hover .case-card__title {
  color: var(--tech);
}
.case-card__result {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 12. 地图 ---------- */
.map-card {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: rgba(22, 34, 50, 0.5);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 28px 20px;
  overflow: hidden;
}
.map-card .grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.2;
}
.map-card__inner {
  position: relative;
  z-index: 2;
}
.map-svg-wrap {
  max-width: 720px;
  margin: 0 auto;
}
.map-svg {
  width: 100%;
  height: auto;
  display: block;
}
.map-path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 2.4s var(--ease);
}
.map-path.is-drawn {
  stroke-dashoffset: 0;
}
.map-label {
  font-size: 2.5px;
}
.city-dot {
  animation: dot-breathe 2.4s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}
.city-ring {
  animation: ring-expand 2.4s ease-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}
.city-dot:nth-of-type(even) {
  animation-delay: 0.8s;
}
@keyframes dot-breathe {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}
@keyframes ring-expand {
  0% {
    opacity: 0.5;
    transform: scale(0.6);
  }
  70%,
  100% {
    opacity: 0;
    transform: scale(1.9);
  }
}
.map-chips {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (min-width: 640px) {
  .map-chips {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1024px) {
  .map-chips {
    grid-template-columns: repeat(6, 1fr);
  }
}
.map-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(15, 25, 35, 0.55);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 14px;
  transition: all 0.25s var(--ease);
}
.map-chip:hover {
  border-color: rgba(0, 212, 255, 0.5);
  transform: translateY(-2px);
}
.map-chip__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.6);
  flex-shrink: 0;
}
.map-chip--hq .map-chip__dot {
  background: var(--tech);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.7);
}
.map-chip__hq {
  color: var(--tech);
  font-size: 12px;
  margin-left: 2px;
}

/* ---------- 13. 合伙人 CTA ---------- */
.cta-partner {
  position: relative;
  overflow: hidden;
  padding: 80px 0;
}
@media (min-width: 1024px) {
  .cta-partner {
    padding: 120px 0;
  }
}
.cta-partner .grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.2;
}
.cta-partner__orb {
  position: absolute;
  top: -40px;
  right: -40px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.12);
  filter: blur(80px);
  animation: glow-pulse 5s ease-in-out infinite;
}
.cta-partner__inner {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-partner__title {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
@media (min-width: 1024px) {
  .cta-partner__title {
    font-size: 36px;
  }
}
.cta-partner__sub {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.cta-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-bottom: 40px;
}
.cta-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  font-size: 14px;
  color: var(--text);
  transition: all 0.25s var(--ease);
}
.cta-chip:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-2px);
}
.cta-chip svg {
  color: var(--gold);
  flex-shrink: 0;
}

/* ---------- 14. 联系区与表单 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }
}
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: all 0.3s var(--ease);
}
.contact-item:hover {
  background: rgba(0, 212, 255, 0.04);
  border-color: rgba(0, 212, 255, 0.2);
  transform: translateX(4px);
}
.contact-item__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech);
  flex-shrink: 0;
  transition: box-shadow 0.3s var(--ease);
}
.contact-item:hover .contact-item__icon {
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}
.contact-item__label {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}
.contact-item__value {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
  word-break: break-all;
}

.form-card {
  padding: 28px;
}
@media (min-width: 640px) {
  .form-card {
    padding: 44px;
  }
}
.form__submit {
  width: 100%;
}
.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form__label {
  font-size: 14px;
  font-weight: 500;
}
.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 14px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.form__input::placeholder,
.form__textarea::placeholder {
  color: rgba(136, 153, 170, 0.6);
}
.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--tech);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}
.form__input.is-invalid,
.form__select.is-invalid,
.form__textarea.is-invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}
.form__textarea {
  resize: none;
  min-height: 110px;
}
.form__select-wrap {
  position: relative;
}
.form__select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 42px;
  cursor: pointer;
}
.form__select-wrap::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.form__select-wrap:focus-within::after {
  border-color: var(--tech);
  transform: translateY(-30%) rotate(225deg);
}
.form__select option {
  background: var(--bg-card);
  color: var(--text);
}
.field-error {
  font-size: 12px;
  color: var(--danger);
  display: none;
}
.field-error.is-shown {
  display: block;
  animation: shake 0.4s var(--ease);
}
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

/* 表单成功面板 */
.form-success {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 56px 24px;
  text-align: center;
  border: 1px dashed rgba(34, 197, 94, 0.4);
  border-radius: var(--r-md);
  background: rgba(34, 197, 94, 0.04);
}
.success-icon {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
}
.success-icon circle {
  stroke: var(--success);
  stroke-width: 2;
  fill: none;
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  animation: circle-draw 0.6s var(--ease) forwards;
}
.success-icon path {
  stroke: var(--success);
  stroke-width: 2.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 34;
  stroke-dashoffset: 34;
  animation: check-draw 0.45s var(--ease) 0.55s forwards;
}
@keyframes circle-draw {
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes check-draw {
  to {
    stroke-dashoffset: 0;
  }
}
.form-success__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.form-success__sub {
  color: var(--text-dim);
  font-size: 14px;
}

/* ---------- 15. 时间轴 ---------- */
.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}
.timeline__line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 16px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--tech) 8%, var(--border) 92%, transparent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 1.6s var(--ease);
}
.timeline__line.is-drawn {
  transform: scaleY(1);
}
@media (min-width: 1024px) {
  .timeline__line {
    left: 50%;
    margin-left: -1px;
  }
}
.timeline__item {
  position: relative;
  display: flex;
  padding-left: 48px;
  margin-bottom: 32px;
}
.timeline__item:last-child {
  margin-bottom: 0;
}
@media (min-width: 1024px) {
  .timeline__item {
    padding-left: 0;
    width: 50%;
  }
  .timeline__item:nth-child(even) {
    margin-left: auto;
    padding-left: 48px;
  }
  .timeline__item:nth-child(odd) {
    padding-right: 48px;
    text-align: right;
  }
}
.timeline__dot {
  position: absolute;
  left: 16px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--tech);
  border: 3px solid var(--bg-card);
  transform: translateX(-50%);
  z-index: 2;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.6);
}
.timeline__dot::after {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid rgba(0, 212, 255, 0.4);
  animation: ring-expand 2.4s ease-out infinite;
}
@media (min-width: 1024px) {
  .timeline__dot {
    left: auto;
    right: -6px;
    transform: none;
  }
  .timeline__item:nth-child(even) .timeline__dot {
    right: auto;
    left: -6px;
  }
}
.timeline__card {
  padding: 20px;
  width: 100%;
}
.timeline__year {
  color: var(--tech);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.timeline__event {
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 16. 团队 / 证书 / 城市卡 ---------- */
.team-card {
  overflow: hidden;
}
.team-card__img-wrap {
  aspect-ratio: 3 / 4;
  background: rgba(15, 25, 35, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  overflow: hidden;
}
.team-card__img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--r-sm);
  transition: transform 0.5s var(--ease);
}
.team-card:hover .team-card__img {
  transform: scale(1.05);
}
.team-card__body {
  padding: 20px;
}
.team-card__name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.team-card__role {
  color: var(--tech);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 12px;
}
.team-card__desc {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.8;
}

.cert-card {
  overflow: hidden;
}
.cert-card__img-wrap {
  aspect-ratio: 4 / 3;
  background: rgba(15, 25, 35, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.cert-card__img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--r-sm);
}
.cert-card__body {
  padding: 20px;
}
.cert-card__number {
  color: var(--gold);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.cert-card__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}
.cert-card__detail {
  color: var(--text-dim);
  font-size: 13px;
}

.city-card {
  padding: 20px;
  transition: all 0.3s var(--ease);
}
.city-card:hover {
  border-color: rgba(0, 212, 255, 0.45);
  transform: translateY(-3px);
}
.city-card__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.city-card__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.5);
  flex-shrink: 0;
}
.city-card--hq .city-card__dot {
  background: var(--tech);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.7);
}
.city-card__name {
  font-weight: 700;
  font-size: 15px;
}
.city-card__hq {
  font-size: 12px;
  color: var(--tech);
  background: rgba(0, 212, 255, 0.1);
  padding: 2px 10px;
  border-radius: 999px;
}
.city-card__address {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 17. 产品详情行 ---------- */
.detail-card {
  padding: 28px;
}
@media (min-width: 640px) {
  .detail-card {
    padding: 48px;
  }
}
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 30px;
}
@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.overview-card {
  padding: 28px 24px;
}
.overview-card .tool-card__icon {
  margin-bottom: 20px;
}
.overview-card .detail-text__subtitle {
  margin-bottom: 12px;
}
.overview-card .product-card__desc {
  margin-bottom: 0;
}
.detail-row {
  display: flex;
  flex-direction: column;
  gap: 40px;
  align-items: center;
  margin-bottom: 64px;
}
.detail-row:last-of-type {
  margin-bottom: 0;
}
@media (min-width: 1024px) {
  .detail-row {
    flex-direction: row;
    gap: 64px;
  }
  .detail-row--reverse {
    flex-direction: row-reverse;
  }
}
.detail-text {
  flex: 1;
  min-width: 0;
}
.detail-text__title {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}
@media (min-width: 1024px) {
  .detail-text__title {
    font-size: 30px;
  }
}
.detail-text__subtitle {
  color: var(--tech);
  font-size: 16px;
  margin-bottom: 14px;
}
.detail-text__desc {
  color: var(--text-dim);
  line-height: 1.9;
  margin-bottom: 28px;
  font-size: 15px;
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 30px;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: all 0.3s var(--ease);
}
.feature-item:hover {
  background: rgba(0, 212, 255, 0.04);
  border-color: rgba(0, 212, 255, 0.18);
  transform: translateX(4px);
}
.feature-item__check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech);
  flex-shrink: 0;
  margin-top: 1px;
}
.feature-item__name {
  font-size: 14px;
  font-weight: 600;
}
.feature-item__desc {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 2px;
  line-height: 1.7;
}
.detail-figure {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.detail-figure::before {
  content: "";
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.12), transparent 65%);
  filter: blur(30px);
}
.detail-figure__img {
  position: relative;
  z-index: 2;
  max-width: 100%;
  max-height: 380px;
  object-fit: contain;
  border-radius: var(--r-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  transition: transform 0.5s var(--ease);
}
.detail-figure:hover .detail-figure__img {
  transform: translateY(-6px) scale(1.02);
}

/* ---------- 18. 硬件卡 ---------- */
.hw-card {
  overflow: hidden;
}
.hw-card__img-wrap {
  aspect-ratio: 4 / 3;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  position: relative;
  overflow: hidden;
}
.hw-card__img-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.08), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.hw-card:hover .hw-card__img-wrap::after {
  opacity: 1;
}
.hw-card__img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--r-sm);
  transition: transform 0.5s var(--ease);
}
.hw-card:hover .hw-card__img {
  transform: scale(1.05);
}
.hw-card__body {
  padding: 24px;
}
.hw-card__title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}
.hw-card__desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.hw-card__features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 19. 权益卡 / 步骤卡 ---------- */
.benefit-card {
  padding: 28px 22px;
  text-align: center;
}
.benefit-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(201, 169, 97, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  margin: 0 auto 16px;
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease);
}
.benefit-card:hover .benefit-card__icon {
  transform: scale(1.12);
  box-shadow: 0 0 24px rgba(201, 169, 97, 0.35);
}
.benefit-card__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}
.benefit-card__desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

.step-card {
  padding: 28px 22px;
  text-align: center;
}
.step-card__num {
  font-size: 30px;
  font-weight: 800;
  background: linear-gradient(180deg, rgba(0, 212, 255, 0.55), rgba(0, 212, 255, 0.12));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}
.step-card__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-card__desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 20. 案例筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 48px;
}
.filter-tab {
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all 0.25s var(--ease);
}
.filter-tab:hover {
  color: var(--text);
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-1px);
}
.filter-tab.is-active {
  background: var(--tech);
  color: var(--bg);
  border-color: var(--tech);
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.35);
}
.case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 1024px) {
  .case-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.case-grid .case-card.is-leaving {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.case-grid .case-card.is-entering {
  animation: case-in 0.45s var(--ease) both;
  animation-delay: var(--d, 0ms);
}
@keyframes case-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.empty-state {
  text-align: center;
  padding: 64px 0;
  color: var(--text-dim);
  font-size: 15px;
}
.empty-state.is-hidden {
  display: none;
}

/* ---------- 21. 新闻卡 ---------- */
.news-card {
  padding: 26px;
}
@media (min-width: 1024px) {
  .news-card {
    padding: 32px;
  }
}
.news-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.news-card__date {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}
.news-card__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  transition: color 0.25s var(--ease);
}
.news-card:hover .news-card__title {
  color: var(--tech);
}
.news-card__summary {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 22. Footer ---------- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.4), transparent);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 48px 0;
}
@media (min-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding: 64px 0;
  }
}
.footer-brand {
  grid-column: 1 / -1;
}
@media (min-width: 1024px) {
  .footer-brand {
    grid-column: auto;
  }
}
.footer-brand__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.footer-brand__logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(0, 212, 255, 0.3);
}
.footer-brand__name {
  font-size: 18px;
  font-weight: 700;
}
.footer-brand__desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 340px;
}
.footer-brand__contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
}
.footer-col__title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col__link {
  font-size: 14px;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.25s var(--ease);
}
.footer-col__link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--tech);
  transition: width 0.25s var(--ease);
}
.footer-col__link:hover {
  color: var(--tech);
  transform: translateX(3px);
}
.footer-col__link:hover::before {
  width: 12px;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 22px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
@media (min-width: 1024px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}
.footer-icp {
  font-size: 12px;
  color: var(--text-dim);
  transition: color 0.25s var(--ease);
}
a.footer-icp:hover {
  color: var(--tech);
}
.footer-copyright {
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- 23. 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass-bg-strong);
  border: 1px solid rgba(0, 212, 255, 0.35);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all 0.35s var(--ease);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.4);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.back-to-top:hover {
  box-shadow: 0 0 26px rgba(0, 212, 255, 0.4);
  transform: translateY(-3px);
}
.back-to-top__ring {
  position: absolute;
  inset: 0;
  transform: rotate(-90deg);
}
.back-to-top__ring circle {
  fill: none;
  stroke: var(--tech);
  stroke-width: 2;
  stroke-dasharray: 138.2;
  stroke-dashoffset: 138.2;
  transition: stroke-dashoffset 0.15s linear;
}

/* ---------- 24. 布局网格 ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 640px) {
  .grid-2,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .grid-2 {
    gap: 28px;
  }
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

.cta-center {
  text-align: center;
  margin-top: 56px;
}

/* 居中长文 */
.prose-center {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  color: var(--text-dim);
  line-height: 2;
  font-size: 15px;
}

/* ---------- 25. 降级与响应式收尾 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal,
  [data-hero-anim] {
    opacity: 1;
    transform: none;
  }
  .map-path,
  .timeline__line {
    stroke-dashoffset: 0;
    transform: scaleY(1);
  }
}