/* ========================================================================
   新生指南 · 江软 — 全局样式表
   设计语言：清新校园蓝 + 柔和卡片 + 移动优先多端适配
   ======================================================================== */

/* ---------- 设计 Token（来自设计稿） ---------- */
:root {
  --brand-primary: #4A90D9;
  --brand-primary-light: #6BA8E8;
  --brand-primary-dark: #3570B0;
  --brand-primary-bg: #EAF2FB;
  --brand-blue: #4A90D9;
  --brand-green: #52C41A;
  --brand-orange: #FA8C16;
  --brand-purple: #722ED1;
  --brand-pink: #EB2F96;
  --brand-yellow: #FAAD14;
  --brand-gray: #8C8C8C;
  --brand-coral: #FF7A45;
  --brand-teal: #13C2C2;

  --color-bg: #F5F7FA;
  --color-bg-white: #FFFFFF;
  --color-bg-card: #FFFFFF;
  --color-bg-soft: #FAFBFC;
  --color-text-primary: #1F2937;
  --color-text-secondary: #4B5563;
  --color-text-tertiary: #9CA3AF;
  --color-text-white: #FFFFFF;
  --color-border: #E8E8E8;
  --color-divider: #F0F0F0;

  --icon-checklist: #4A90D9;
  --icon-dormitory: #52C41A;
  --icon-transport: #FA8C16;
  --icon-network: #722ED1;
  --icon-dining: #EB2F96;
  --icon-registration: #4A90D9;
  --icon-faq: #52C41A;
  --icon-certificate: #8C8C8C;
  --icon-notice: #FAAD14;
  --icon-group: #4A90D9;

  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Noto Serif SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", serif;

  --fs-xs: 10px;
  --fs-sm: 12px;
  --fs-base: 14px;
  --fs-md: 15px;
  --fs-lg: 16px;
  --fs-xl: 18px;
  --fs-2xl: 20px;
  --fs-3xl: 24px;

  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 900;

  --lh-tight: 1.25;
  --lh-normal: 1.5;
  --lh-relaxed: 1.75;

  --sp-xs: 4px;
  --sp-sm: 8px;
  --sp-md: 12px;
  --sp-lg: 16px;
  --sp-xl: 20px;
  --sp-2xl: 24px;
  --sp-3xl: 32px;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-2xl: 20px;
  --r-full: 9999px;

  --shadow-card: 0 1px 6px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 6px 20px rgba(74, 144, 217, 0.18);
  --shadow-float: 0 8px 28px rgba(15, 23, 42, 0.12);

  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --header-h: 52px;
  --status-h: 28px;
  --tab-h: 64px;
  --app-max-w: 480px;
}

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

html, body {
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  text-size-adjust: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

button {
  border: none;
  background: transparent;
  font-family: inherit;
  color: inherit;
  cursor: pointer;
  padding: 0;
}

input {
  border: none;
  outline: none;
  background: transparent;
  font-family: inherit;
  color: inherit;
}

ul, li { margin: 0; padding: 0; list-style: none; }
p, h1, h2, h3, h4 { margin: 0; }

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

/* ---------- 背景装饰 ---------- */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
  animation: drift 22s ease-in-out infinite;
}
.blob-1 {
  width: 320px; height: 320px;
  background: radial-gradient(circle at 30% 30%, #B3D4FF, #4A90D9);
  top: -120px; right: -80px;
}
.blob-2 {
  width: 280px; height: 280px;
  background: radial-gradient(circle at 50% 50%, #FFE0CC, #FF7A45);
  top: 38%; left: -140px;
  animation-delay: -6s;
}
.blob-3 {
  width: 240px; height: 240px;
  background: radial-gradient(circle at 50% 50%, #D6F5C0, #52C41A);
  bottom: 80px; right: -60px;
  animation-delay: -12s;
}
.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 144, 217, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 217, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at 50% 30%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black 0%, transparent 70%);
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -30px) scale(1.08); }
}

/* ---------- 状态栏 ---------- */
.status-bar {
  position: relative;
  z-index: 5;
  height: var(--status-h);
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  background: transparent;
}
.status-time { font-variant-numeric: tabular-nums; letter-spacing: 0.5px; }
.status-icons {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--color-text-primary);
}
.battery {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  position: relative;
  top: -1px;
}
.battery-body {
  width: 20px;
  height: 10px;
  border: 1.5px solid currentColor;
  border-radius: 3px;
  position: relative;
  display: inline-block;
}
.battery-body::after {
  content: "";
  position: absolute;
  inset: 1.5px;
  background: currentColor;
  border-radius: 1px;
  width: 70%;
}
.battery-tip {
  width: 2px;
  height: 5px;
  background: currentColor;
  border-radius: 0 1px 1px 0;
}

/* ---------- App Shell ---------- */
.app-shell {
  position: relative;
  z-index: 1;
  max-width: var(--app-max-w);
  margin: 0 auto;
  padding: 0 16px 32px;
  min-height: calc(100vh - var(--status-h));
}

/* ---------- 顶部应用栏 ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 -16px;
  padding: 0 12px;
  background: rgba(245, 247, 250, 0.82);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.app-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  position: relative;
  transition: background 0.2s, transform 0.15s;
  flex-shrink: 0;
}
.icon-btn:active { transform: scale(0.92); background: rgba(74, 144, 217, 0.1); }
.icon-btn.has-badge .badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: var(--r-full);
  background: #FF4D4F;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  border: 1.5px solid var(--color-bg);
}
.header-search {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 12px;
  background: rgba(74, 144, 217, 0.08);
  border-radius: var(--r-full);
  color: var(--color-text-tertiary);
  transition: background 0.25s, box-shadow 0.25s;
}
.header-search:focus-within {
  background: #fff;
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.18), var(--shadow-card);
}
.header-search input {
  flex: 1;
  font-size: 13px;
  color: var(--color-text-primary);
}
.header-search input::placeholder { color: var(--color-text-tertiary); }

/* ---------- 顶部品牌语 ---------- */
.brand-line {
  text-align: center;
  font-size: 11px;
  color: var(--color-text-secondary);
  letter-spacing: 1.5px;
  padding: 10px 0 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.brand-tag {
  display: inline-block;
  padding: 2px 8px;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-light));
  color: #fff;
  border-radius: var(--r-sm);
  font-weight: 700;
  letter-spacing: 2px;
  box-shadow: 0 2px 8px rgba(74, 144, 217, 0.3);
}
.brand-divider { color: var(--color-text-tertiary); }
.brand-slogan { color: var(--color-text-secondary); font-weight: 500; }

/* ---------- Hero 轮播 ---------- */
.hero-section {
  margin: 0 -16px 20px;
  padding: 0 16px;
}
.hero-carousel {
  position: relative;
  height: 170px;
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(74, 144, 217, 0.22), 0 2px 6px rgba(15, 23, 42, 0.08);
  transform: translateZ(0);
}
.hero-track {
  display: flex;
  height: 100%;
  transition: transform 0.55s var(--ease-out);
  will-change: transform;
}
.hero-slide {
  position: relative;
  flex: 0 0 100%;
  height: 100%;
  overflow: hidden;
}
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.05);
  transition: transform 8s ease-out;
}
.hero-slide.is-active img { transform: scale(1.15); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 25%, rgba(0,0,0,0.65) 100%),
    linear-gradient(135deg, rgba(74,144,217,0.15), transparent 60%);
}
.hero-content {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 24px;
  color: #fff;
  z-index: 2;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 1px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.hero-ikun {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 1px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
  margin-top: 4px;
}
.hero-sub {
  margin-top: 6px;
  font-size: 12px;
  opacity: 0.92;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.85);
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  z-index: 3;
  backdrop-filter: blur(8px);
  transition: background 0.2s, transform 0.2s;
}
.hero-arrow:hover { background: #fff; transform: translateY(-50%) scale(1.08); }
.hero-prev { left: 10px; }
.hero-next { right: 10px; }
.hero-dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 3;
}
.hero-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,0.5);
  transition: width 0.35s var(--ease-spring), background 0.35s;
  cursor: pointer;
  border: none;
  padding: 0;
}
.hero-dot.is-active {
  width: 18px;
  background: #fff;
}

/* ---------- 通用 Section ---------- */
.section {
  margin-bottom: 20px;
}
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.section-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-accent {
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--brand-primary);
}
.section-accent.accent-coral { background: var(--brand-coral); }
.section-accent.accent-yellow { background: var(--brand-yellow); }
.section-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: 0.5px;
}
.section-count {
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
  padding: 2px 8px;
  background: var(--color-bg);
  border-radius: var(--r-full);
}
.section-count.hot {
  color: #FF4D4F;
  background: #FFF1F0;
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 1px;
}
.section-more {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
  padding: 4px 4px 4px 8px;
  transition: color 0.2s;
}
.section-more:active { color: var(--brand-primary); }

/* ---------- 新生必看 网格 ---------- */
.grid-quick {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.quick-card {
  position: relative;
  background: var(--color-bg-card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  overflow: hidden;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s, border-color 0.25s;
  border: 1px solid transparent;
  opacity: 0;
  transform: translateY(12px);
  animation: cardIn 0.5s var(--ease-out) forwards;
}
.quick-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--card-glow, transparent);
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}
.quick-card:active {
  transform: scale(0.96);
  box-shadow: var(--shadow-card-hover);
}
.quick-card.is-hover {
  border-color: rgba(74, 144, 217, 0.2);
  box-shadow: var(--shadow-card-hover);
}
.quick-card.is-hover::before { opacity: 1; }
.quick-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform 0.3s var(--ease-spring);
}
.quick-card:active .quick-icon,
.quick-card.is-hover .quick-icon { transform: scale(1.1) rotate(-5deg); }
.quick-icon::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: inherit;
  filter: blur(8px);
  opacity: 0;
  transition: opacity 0.3s;
  z-index: -1;
}
.quick-card.is-hover .quick-icon::after { opacity: 0.5; }
.quick-label {
  font-size: 13px;
  color: var(--color-text-primary);
  font-weight: 500;
  margin-top: 8px;
}
.quick-hint {
  font-size: 10px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}
.quick-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: var(--r-full);
  background: #FF4D4F;
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  line-height: 16px;
}
@keyframes cardIn {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 校园介绍 横向滚动 ---------- */
.campus-scroll {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  margin: 0 -16px;
  padding: 4px 16px 8px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  touch-action: pan-x;
  cursor: grab;
  user-select: none;
}
.campus-scroll::-webkit-scrollbar { display: none; }
.campus-card {
  position: relative;
  min-width: 200px;
  height: 120px;
  border-radius: var(--r-lg);
  padding: 14px;
  flex-shrink: 0;
  overflow: hidden;
  text-align: left;
  color: #fff;
  scroll-snap-align: start;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.12);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s;
}
.campus-card:active { transform: scale(0.97); }
.campus-card::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 140%;
  height: 140%;
  background: radial-gradient(circle, rgba(255,255,255,0.18), transparent 50%);
  pointer-events: none;
}
.campus-icon {
  position: absolute;
  right: 12px;
  top: 12px;
  opacity: 0.95;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.15));
}
.campus-meta {
  position: absolute;
  bottom: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  flex-direction: column;
}
.campus-name {
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: 0.5px;
}
.campus-desc {
  font-size: 10px;
  opacity: 0.85;
  margin-top: 2px;
}
.campus-arrow {
  position: absolute;
  bottom: 14px;
  right: 12px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.campus-card-add { border: 2px dashed rgba(255,255,255,0.4); }

/* ---------- 意见反馈 ---------- */
.feedback-card {
  width: 100%;
  background: var(--color-bg-card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s;
}
.feedback-card:active { transform: scale(0.98); box-shadow: var(--shadow-card-hover); }
.feedback-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #E6F7FF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.feedback-body { flex: 1; }
.feedback-title {
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--color-text-primary);
}
.feedback-desc {
  margin-top: 2px;
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
}
.feedback-arrow { color: var(--color-text-tertiary); }

/* ---------- Modal 详情面板 ---------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.modal-mask.is-open { opacity: 1; visibility: visible; }
.modal-sheet {
  width: 100%;
  max-width: var(--app-max-w);
  max-height: 85vh;
  background: var(--color-bg-white);
  border-radius: var(--r-2xl) var(--r-2xl) 0 0;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.4s var(--ease-spring);
  overflow: hidden;
}
.modal-mask.is-open .modal-sheet { transform: translateY(0); }
.modal-handle {
  width: 36px;
  height: 4px;
  background: var(--color-border);
  border-radius: var(--r-full);
  margin: 10px auto 4px;
  flex-shrink: 0;
}
.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px 14px;
  border-bottom: 1px solid var(--color-divider);
  flex-shrink: 0;
}
.modal-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.modal-titles { flex: 1; min-width: 0; }
.modal-titles h2 {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}
.modal-titles p {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: background 0.2s, transform 0.2s;
}
.modal-close:active { transform: rotate(90deg); background: var(--color-divider); }
.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px 32px;
  -webkit-overflow-scrolling: touch;
}
.modal-image-block {
  margin-bottom: 20px;
  text-align: center;
}
.modal-image-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--brand-primary);
  margin-bottom: 16px;
  margin-top: 8px;
  text-align: center;
}
.modal-content-image {
  width: 100%;
  max-width: 100%;
  border-radius: 12px;
  display: block;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}
.modal-section { margin-bottom: 20px; }
.modal-section:last-child { margin-bottom: 0; }
.modal-section-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.modal-section-title::before {
  content: "";
  width: 3px;
  height: 12px;
  background: var(--brand-primary);
  border-radius: 2px;
}
.modal-list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-divider);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}
.modal-list-item:last-child { border-bottom: none; }
.modal-list-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-primary);
  margin-top: 8px;
  flex-shrink: 0;
}
.modal-callout {
  background: var(--brand-primary-bg);
  border-left: 3px solid var(--brand-primary);
  padding: 12px 14px;
  border-radius: var(--r-sm);
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin: 10px 0;
}
.modal-callout strong { color: var(--brand-primary-dark); }
.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.modal-tag {
  padding: 4px 10px;
  background: var(--color-bg);
  border-radius: var(--r-full);
  font-size: 11px;
  color: var(--color-text-secondary);
}
.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.modal-btn {
  flex: 1;
  height: 44px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.modal-btn-primary {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-light));
  color: #fff;
  box-shadow: 0 4px 14px rgba(74, 144, 217, 0.4);
}
.modal-btn-primary:active { transform: scale(0.97); }
.modal-btn-ghost {
  background: var(--color-bg);
  color: var(--color-text-secondary);
}
.modal-btn-ghost:active { transform: scale(0.97); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: rgba(15, 23, 42, 0.88);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--r-md);
  font-size: 13px;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, transform 0.25s var(--ease-spring), visibility 0.25s;
  pointer-events: none;
  max-width: 80%;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.toast.is-show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 16px;
  bottom: calc(var(--tab-h) + 16px);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.95);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-float);
  z-index: 25;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s var(--ease-spring);
  backdrop-filter: blur(10px);
}
.back-top.is-show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:active { transform: scale(0.9); }

/* ---------- 水印 ---------- */
.watermark {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-15deg);
  font-size: 60px;
  font-weight: 900;
  color: var(--color-text-primary);
  opacity: 0.025;
  pointer-events: none;
  white-space: nowrap;
  z-index: 0;
  letter-spacing: 4px;
}

/* ========================================================================
   响应式 · 平板 (≥ 640px)
   ======================================================================== */
@media (min-width: 640px) {
  :root {
    --app-max-w: 760px;
    --header-h: 60px;
  }
  .app-shell { padding: 0 24px 32px; }
  .hero-section { margin: 0 -24px 24px; padding: 0 24px; }
  .hero-carousel { height: 240px; }
  .hero-title { font-size: 28px; }
  .hero-ikun { font-size: 28px; }
  .hero-arrow { display: flex; }
  .grid-quick { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .quick-card { padding: 18px 14px; }
  .quick-icon { width: 48px; height: 48px; }
  .quick-label { font-size: 14px; }
  .campus-scroll { margin: 0 -24px; padding: 4px 24px 8px; }
  .campus-card { min-width: 240px; height: 140px; }
  .campus-name { font-size: var(--fs-lg); }
  .campus-desc { font-size: 11px; }
  .section-title { font-size: var(--fs-xl); }
  .brand-line { font-size: 12px; padding: 14px 0 14px; }
}

/* ========================================================================
   响应式 · 桌面 (≥ 1024px)
   ======================================================================== */
@media (min-width: 1024px) {
  :root {
    --app-max-w: 1180px;
    --header-h: 64px;
    --tab-h: 0px;
  }

  body { background: linear-gradient(135deg, #EEF4FB 0%, #F5F7FA 50%, #FFF6EE 100%); }

  .bg-decor .grid-pattern {
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 60%);
  }

  /* 桌面端隐藏状态栏 */
  .status-bar { display: none; }

  .app-shell { padding: 0 32px 32px; }
  .hero-section { margin: 0 -32px 28px; padding: 0 32px; }
  .hero-carousel { height: 300px; border-radius: var(--r-2xl); }
  .hero-title { font-size: 34px; }
  .hero-ikun { font-size: 34px; }
  .hero-sub { font-size: 14px; }
  .hero-arrow { display: flex; width: 40px; height: 40px; }

  /* 桌面双栏布局 */
  .desktop-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 28px;
    align-items: start;
  }
  .desktop-main { min-width: 0; }
  .desktop-aside {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .grid-quick { grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .quick-card { padding: 20px 16px; }
  .quick-icon { width: 52px; height: 52px; }
  .quick-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(74, 144, 217, 0.2);
  }
  .quick-card:hover::before { opacity: 1; }
  .quick-card:hover .quick-icon { transform: scale(1.1) rotate(-5deg); }
  .quick-card:hover .quick-icon::after { opacity: 0.5; }

  .campus-scroll {
    margin: 0 -32px;
    padding: 4px 32px 8px;
  }
  .campus-card { min-width: 280px; height: 160px; cursor: pointer; }
  .campus-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(15,23,42,0.18); }

  .feedback-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card-hover); }

  .section-more:hover { color: var(--brand-primary); }
  .icon-btn:hover { background: rgba(74, 144, 217, 0.1); }

  .back-top {
    bottom: 32px;
    right: 32px;
  }

  /* 桌面端 Modal 居中显示 */
  .modal-mask { align-items: center; }
  .modal-sheet {
    border-radius: var(--r-2xl);
    max-width: 560px;
    max-height: 80vh;
    transform: translateY(40px) scale(0.96);
  }
  .modal-mask.is-open .modal-sheet { transform: translateY(0) scale(1); }
}

/* ========================================================================
   响应式 · 大屏 (≥ 1440px)
   ======================================================================== */
@media (min-width: 1440px) {
  :root { --app-max-w: 1280px; }
  .app-shell { padding: 0 40px; }
  .app-header { margin: 0 -40px; padding: 0 40px; }
  .hero-section { margin: 0 -40px 32px; padding: 0 40px; }
  .campus-scroll { margin: 0 -40px; padding: 4px 40px 8px; }
}

/* ---------- 图片查看器（点击 Hero 放大） ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  padding: 20px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox-stage {
  position: relative;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transform: scale(0.92);
  transition: transform 0.35s var(--ease-spring);
}
.lightbox.is-open .lightbox-stage { transform: scale(1); }
.lightbox-stage img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: var(--r-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  object-fit: contain;
  background: #1a1a1a;
}
.lightbox-caption {
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  text-align: center;
  margin: 0;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: background 0.2s, transform 0.2s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.lightbox-close:active { transform: rotate(90deg) scale(0.92); background: rgba(255, 255, 255, 0.3); }

/* ---------- 底部声明 ---------- */
.footer-note {
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-sans);
  padding: 16px 0 8px;
  letter-spacing: 0.5px;
}

/* ---------- 减少动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .blob { animation: none; }
}