/* ===== Design Tokens ===== */
:root {
  /* 背景色 */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);

  /* 主色调-冰蓝渐变 */
  --accent-ice: #38bdf8;
  --accent-deep: #0ea5e9;
  --accent-purple: #6366f1;
  --accent-gradient: linear-gradient(135deg, var(--accent-ice) 0%, var(--accent-purple) 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);

  /* 文字色 */
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-white: #ffffff;

  /* 边框 */
  --border-light: #e2e8f0;
  --border-glow: rgba(56, 189, 248, 0.3);
  --border-glow-strong: rgba(56, 189, 248, 0.5);

  /* 阴影 */
  --shadow-soft: 0 4px 24px rgba(14, 165, 233, 0.08);
  --shadow-medium: 0 8px 32px rgba(14, 165, 233, 0.12);
  --shadow-large: 0 16px 48px rgba(14, 165, 233, 0.16);
  --shadow-glow: 0 0 32px rgba(56, 189, 248, 0.25);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* 动效 */
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-modal: 800ms;

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --line-height-base: 1.7;
  --line-height-tight: 1.3;
}

/* ===== Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

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

ul, ol {
  list-style: none;
}

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

svg {
  display: block;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-default);
}

#app.is-visible {
  opacity: 1;
}

.container {
  max-width: 80vw;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ===== 首屏弹窗 ===== */
.splash-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity var(--duration-modal) var(--ease-default);
}

.splash-modal.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.splash-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
}

.splash-modal__content {
  position: relative;
  width: 90%;
  max-width: 720px;
  max-height: 85vh;
  animation: splashIn var(--duration-slow) var(--ease-default);
}

@keyframes splashIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.splash-modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 10;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  transition: all var(--duration-fast) var(--ease-default);
}

.splash-modal__close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.splash-modal__close svg {
  width: 20px;
  height: 20px;
}

.splash-modal__image-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-large), var(--shadow-glow);
}

.splash-modal__image {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?w=1600&q=80');
  background-size: cover;
  background-position: center;
}

.splash-modal__gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(56, 189, 248, 0.3) 0%,
    rgba(99, 102, 241, 0.25) 50%,
    rgba(15, 23, 42, 0.6) 100%
  );
}

.splash-modal__text {
  position: absolute;
  left: var(--space-10);
  bottom: var(--space-10);
  right: var(--space-10);
  color: var(--text-white);
}

.splash-modal__sub {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 3px;
  opacity: 0.7;
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}

.splash-modal__title {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
  letter-spacing: 1px;
}

.splash-modal__desc {
  font-size: clamp(14px, 1.5vw, 16px);
  opacity: 0.8;
  font-weight: 300;
}

/* ===== 导航栏 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__logo {
  /* width: 36px; */
  height: 36px;
}

.nav__logo svg {
  width: 100%;
  height: 100%;
}

.nav__name {
  font-size: 18px;
  font-weight: 600;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--duration-fast) var(--ease-default);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 1px;
  transition: width var(--duration-base) var(--ease-default);
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--cta {
  padding: var(--space-2) var(--space-5);
  background: var(--accent-gradient);
  color: var(--text-white);
  border-radius: var(--radius-md);
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.25);
  transition: all var(--duration-fast) var(--ease-default);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  color: var(--text-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.35);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--duration-fast) var(--ease-default);
}

/* ===== 轮播区 ===== */
/* ---------- 新闻区域（轮播70% + 资讯30%） ---------- */
.news-section {
  padding: 42px 0;
  background: var(--bg-primary);
}

.news-wrap {
  display: grid;
  grid-template-columns: 7fr 3fr;
  gap: 24px;
  align-items: stretch;
}

.carousel {
  position: relative;
  width: 100%;
  height: clamp(320px, 42vw, 480px);
  overflow: hidden;
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
}

.carousel__track {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
  pointer-events: none;
}

.carousel__slide--active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.carousel__slide--prev {
  transform: translateX(-30px);
}

.carousel__image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.carousel__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(15, 23, 42, 0.7) 0%,
    rgba(15, 23, 42, 0.4) 40%,
    rgba(15, 23, 42, 0.1) 70%,
    transparent 100%
  );
}

.carousel__content {
  position: absolute;
  left: 8%;
  top: 50%;
  transform: translateY(-50%);
  max-width: 560px;
  color: var(--text-white);
  z-index: 2;
}

.carousel__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--accent-gradient);
  color: var(--text-white);
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
  letter-spacing: 0.5px;
}

.carousel__title {
  font-size: clamp(24px, 3.5vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.carousel__subtitle {
  font-size: clamp(14px, 1.5vw, 16px);
  opacity: 0.85;
  margin-bottom: var(--space-6);
  font-weight: 400;
  line-height: 1.6;
}

.carousel__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--text-white);
  color: var(--accent-deep);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-default);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.carousel__btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-base) var(--ease-default);
}

.carousel__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.carousel__btn:hover svg {
  transform: translateX(4px);
}

/* 轮播导航按钮 */
.carousel__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: var(--text-white);
  z-index: 3;
  opacity: 0;
  transition: all var(--duration-base) var(--ease-default);
}

.carousel:hover .carousel__nav {
  opacity: 1;
}

.carousel__nav:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.carousel__nav svg {
  width: 20px;
  height: 20px;
}

.carousel__nav--prev {
  left: var(--space-5);
}

.carousel__nav--next {
  right: var(--space-5);
}

/* 轮播指示器 */
.carousel__dots {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-2);
  z-index: 3;
}

.carousel__dot {
  width: 32px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.3);
  transition: all var(--duration-base) var(--ease-default);
  overflow: hidden;
  position: relative;
}

.carousel__dot--active {
  background: rgba(255, 255, 255, 0.8);
  width: 48px;
}

.carousel__dot--active::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--text-white);
  transform-origin: left;
  animation: dotProgress 5s linear forwards;
}

@keyframes dotProgress {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.carousel__dot:hover {
  background: rgba(255, 255, 255, 0.5);
}

/* ---------- 右侧新闻资讯列表 ---------- */
.news-list {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.news-list__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-light);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.06) 0%, rgba(99, 102, 241, 0.06) 100%);
}

.news-list__title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  position: relative;
  padding-left: 12px;
}

.news-list__title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  background: linear-gradient(180deg, var(--accent-ice), var(--accent-purple));
  border-radius: 2px;
}

.news-list__more {
  font-size: 13px;
  color: var(--accent-deep);
  text-decoration: none;
  transition: opacity var(--duration-fast) var(--ease-default);
}

.news-list__more:hover {
  opacity: 0.7;
}

.news-list__items {
  list-style: none;
  padding: 8px 0;
  margin: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 20px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: background var(--duration-fast) var(--ease-default);
}

.news-item:last-child {
  border-bottom: none;
}

.news-item:hover {
  background: rgba(56, 189, 248, 0.04);
}

.news-item__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent-deep);
  background: rgba(56, 189, 248, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  align-self: flex-start;
  line-height: 1.6;
}

.news-item__link {
  font-size: 14px;
  color: var(--text-primary);
  text-decoration: none;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--duration-fast) var(--ease-default);
}

.news-item__link:hover {
  color: var(--accent-deep);
}

.news-item__date {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== 活动报名区 ===== */
.activities-section {
  padding: var(--space-8) 0;
  background: var(--bg-primary);
  position: relative;
}

.activities-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-light), transparent);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.section-header__eyebrow {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--accent-deep);
  margin-bottom: var(--space-3);
}

.section-header__title {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.section-header__desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* 活动卡片滚动容器 */
.activity-grid-scroll {
  max-height: 500px;
  overflow-y: hidden;
  overflow-x: hidden;
  position: relative;
  margin-bottom: var(--space-10);
}

.activity-grid-scroll:hover .activity-grid {
  animation-play-state: paused;
}

.activity-grid {
  animation: autoScroll 30s linear infinite;
  transition: none;
}

@keyframes autoScroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* 活动卡片网格 */
.activity-grid {
  display: grid;
  grid-template-columns: repeat(4, 354px);
  gap: var(--space-5);
  grid-template-rows: auto auto;
  grid-auto-flow: column;
}

/* 活动卡片 */
.activity-card {
  width: 354px;
  position: relative;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-default);
  display: flex;
  flex-direction: column;
}

.activity-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  transition: background var(--duration-base) var(--ease-default);
}

.activity-card:hover {
  box-shadow: var(--shadow-medium), var(--shadow-glow);
  border-color: transparent;
}

.activity-card:hover::before {
  background: linear-gradient(135deg, var(--accent-ice), var(--accent-purple));
}

.activity-card.is-hidden {
  display: none;
}

.activity-card__badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 2;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
}

.badge--hot {
  background: linear-gradient(135deg, #f97316, #ef4444);
  color: var(--text-white);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.badge--upcoming {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: var(--text-white);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

.activity-card__image {
  position: relative;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.activity-card__img-bg {
  position: absolute;
  inset: 0;
  transition: transform var(--duration-slow) var(--ease-default);
}

.activity-card:hover .activity-card__img-bg {
  transform: scale(1.05);
}

.activity-card__icon {
  position: relative;
  width: 44px;
  height: 44px;
  z-index: 1;
}

.activity-card__body {
  padding: var(--space-4);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.activity-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.activity-card__type {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-deep);
  padding: 2px 8px;
  background: rgba(56, 189, 248, 0.1);
  border-radius: var(--radius-sm);
}

.activity-card__date {
  font-size: 12px;
  color: var(--text-muted);
}

.activity-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  line-height: 1.4;
  transition: color var(--duration-fast) var(--ease-default);
}

.activity-card__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
}

.activity-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-light);
}

.activity-card__stats {
  display: flex;
  gap: var(--space-3);
}

.activity-card__stat {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

.activity-card__stat svg {
  width: 14px;
  height: 14px;
}

.activity-card__btn {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-deep);
  transition: all var(--duration-fast) var(--ease-default);
}

.activity-card__btn svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-fast) var(--ease-default);
}

.activity-card:hover .activity-card__btn svg {
  transform: translateX(3px);
}

/* 查看更多 */
.activities-more {
  text-align: right;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-default);
}

.btn--outline {
  /* background: var(--bg-secondary); */
  background: transparent;
  color: var(--accent-deep);
  border: 1px solid var(--border-glow);
}

.btn--outline:hover {
  background: var(--accent-gradient);
  color: var(--text-white);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.25);
}

.btn--outline svg {
  width: 16px;
  height: 16px;
}

/* ===== 特色板块通用 ===== */
.feature-section {
  padding: 100px 0;
  position: relative;
  background: var(--bg-primary);
}
/* ===== 公司简介与合作伙伴 ===== */
.about-section {
  padding-top: 32px;
  position: relative;
  background: var(--bg-primary);
  overflow: hidden;
}

.about-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.about-section::after {
  content: '';
  position: absolute;
  bottom: -300px;
  left: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.about-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
  position: relative;
  z-index: 1;
}

.about-header .section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 500;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.about-header .section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.about-header .section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 80px;
  position: relative;
  z-index: 1;
}

.stat-card {
  background: var(--bg-secondary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  padding: 1px;
  background: linear-gradient(135deg, transparent 0%, transparent 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.stat-card:hover {
  border-color: transparent;
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.1);
  transform: translateY(-4px);
}

.stat-card:hover::before {
  opacity: 1;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.5) 0%, rgba(99, 102, 241, 0.3) 100%);
}

.stat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.stat-icon--blue {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(14, 165, 233, 0.1) 100%);
  color: var(--accent-deep);
}

.stat-icon--purple {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(79, 70, 229, 0.1) 100%);
  color: var(--accent-purple);
}

.stat-icon--cyan {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(8, 145, 178, 0.1) 100%);
  color: #0891b2;
}

.stat-icon--green {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.1) 100%);
  color: #059669;
}

.stat-number {
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent-ice) 0%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.stat-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.about-partners {
  position: relative;
  z-index: 1;
}

.partners-header {
  text-align: center;
  margin-bottom: 40px;
}

.partners-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.partners-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--border-light);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  overflow: hidden;
}

.partner-logo {
  background: var(--bg-secondary);
  padding: 28px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.partner-logo span {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.partner-logo:hover {
  background: rgba(56, 189, 248, 0.04);
}

.partner-logo:hover span {
  color: var(--accent-deep);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--text-primary);
  color: var(--text-white);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: auto;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-4);
}

.footer__logo svg {
  width: 100%;
  height: 100%;
}

.footer__name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.footer__desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
}

.footer__title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-5);
  color: var(--text-white);
}

.footer__links li {
  margin-bottom: var(--space-3);
}

.footer__links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--duration-fast) var(--ease-default);
  position: relative;
}

.footer__links a:hover {
  color: var(--accent-ice);
  padding-left: 4px;
}

.footer__contact li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}

.footer__contact svg {
  width: 16px;
  height: 16px;
  margin-top: 3px;
  flex-shrink: 0;
  color: var(--accent-ice);
}

.footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 滚动出现动画 ===== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .activity-grid {
    grid-template-columns: repeat(2, 354px);
  }

  .footer__grid {
    grid-template-columns: 354px 354px;
    gap: var(--space-8);
  }

  .footer__brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-4);
  }

  .feature-section {
    padding: 60px 0;
  }

  /* 新闻区域移动端：上下布局 */
  .news-wrap {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .carousel {
    height: 320px;
  }

  .news-list {
    max-height: 360px;
  }

  /* 导航移动端 */
  .nav__menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-medium);
  }

  .nav__menu.is-open {
    display: flex;
  }

  .nav__link {
    padding: var(--space-3) var(--space-4);
    width: 100%;
  }

  .nav__link::after {
    display: none;
  }

  .nav__link--cta {
    margin-top: var(--space-2);
    text-align: center;
  }

  .nav__toggle {
    display: flex;
  }

  /* 轮播移动端 */
  .carousel {
    height: clamp(280px, 60vw, 420px);
  }

  .carousel__content {
    left: var(--space-5);
    right: var(--space-5);
    max-width: none;
  }

  .carousel__nav {
    display: none;
  }

  .carousel__dots {
    bottom: var(--space-4);
  }

  .carousel__dot {
    width: 24px;
  }

  .carousel__dot--active {
    width: 36px;
  }

  /* 活动区移动端 */
  .activities-section {
    padding: var(--space-12) 0;
  }

  .section-header {
    margin-bottom: var(--space-8);
  }

  .activity-grid-scroll {
    max-height: 720px;
  }

  .activity-grid {
    grid-template-columns: 354px;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
  }

  /* 弹窗移动端 */
  .splash-modal__text {
    left: var(--space-5);
    bottom: var(--space-6);
    right: var(--space-5);
  }

  /* 页脚移动端 */
  .footer {
    padding: var(--space-12) 0 var(--space-6);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
  }

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

  /* 公司简介移动端 */
  .about-section {
    padding: 60px 0;
  }

  .about-header .section-title {
    font-size: 24px;
  }

  .about-header .section-subtitle {
    font-size: 14px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 50px;
  }

  .stat-card {
    padding: 20px 12px;
  }

  .stat-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 12px;
  }

  .stat-icon svg {
    width: 22px;
    height: 22px;
  }

  .stat-number {
    font-size: 28px;
  }

  .stat-label {
    font-size: 13px;
  }

  .stat-desc {
    font-size: 11px;
  }

  .partners-title {
    font-size: 20px;
  }

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

  .partner-logo {
    padding: 20px 8px;
  }

  .partner-logo span {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .activity-card__footer {
    flex-direction: column;
    gap: var(--space-3);
    align-items: flex-start;
  }

  .carousel__title {
    font-size: 22px;
  }

  .splash-modal__image-wrap {
    aspect-ratio: 4 / 5;
  }
}