/* ============================================================
   Bunny Care Hub — common.css
   纯静态宠物垂耳兔 & 侏儒兔科普站 · 全站公共设计系统
   移动优先（基准 360px）· 断点 768 / 1024 / 1440
   无框架、无外部字体、无外部依赖
   ============================================================ */

/* ------------------------------------------------------------
   1. Design Tokens 设计令牌
   ------------------------------------------------------------ */
:root {
  /* 品牌色 */
  --color-primary: #247869;
  --color-primary-dark: #1c5f53;
  --color-primary-darker: #164a41;
  --color-primary-light: #e8f2f0;
  --color-primary-tint: #f1f7f6;

  /* 中性色 */
  --color-bg: #f7f9f9;
  --color-card: #ffffff;
  --color-text: #21302d;
  --color-text-muted: #5c6b68;
  --color-border: #e2e8e7;
  --color-border-strong: #cdd7d4;

  /* 语义色 */
  --color-danger: #d63031;
  --color-danger-dark: #b72526;
  --color-danger-light: #fdeaeb;
  --color-warning: #e0861a;
  --color-warning-light: #fdf3e2;
  --color-success: #247869;
  --color-info: #2b6cb0;
  --color-info-light: #e8f1fb;

  /* 圆角 */
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-sm: 6px;
  --radius-pill: 999px;

  /* 阴影 */
  --shadow-card: 0 2px 10px rgba(20, 50, 45, 0.06);
  --shadow-card-hover: 0 8px 24px rgba(20, 50, 45, 0.12);
  --shadow-header: 0 1px 0 rgba(20, 50, 45, 0.08);
  --shadow-fab: 0 4px 14px rgba(20, 50, 45, 0.22);

  /* 尺寸 */
  --header-h: 58px;
  --touch-min: 44px;
  --container: 1180px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* 字体 */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans JP",
    Roboto, Helvetica, Arial, sans-serif;

  --ease: 0.25s ease;
}

/* ------------------------------------------------------------
   2. Reset & Base
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  word-wrap: break-word;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-3);
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

p {
  margin: 0 0 var(--space-4);
}

ul, ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.4em;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid rgba(36, 120, 105, 0.45);
  outline-offset: 2px;
}

::selection {
  background: var(--color-primary-light);
}

/* ------------------------------------------------------------
   3. Layout Utilities 布局工具
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-7) 0;
}

.section-sm {
  padding: var(--space-5) 0;
}

.section-tight {
  padding: var(--space-4) 0;
}

.section-head {
  margin-bottom: var(--space-5);
}

.section-head--with-action {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.section-title {
  font-size: 1.4rem;
  margin-bottom: var(--space-2);
}

.section-subtitle {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 0.98rem;
}

.page-head {
  padding: var(--space-6) 0 var(--space-5);
}

.page-title {
  font-size: 1.65rem;
  margin-bottom: var(--space-3);
}

.page-desc {
  color: var(--color-text-muted);
  font-size: 1.02rem;
  margin: 0;
  max-width: 760px;
}

main {
  display: block;
  min-height: 40vh;
}

/* 栅格（移动优先：默认单列，大屏多列） */
.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.grid-2 { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
.grid-3 { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
.grid-4 { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }

/* 工具类 */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  border: 0; clip: rect(0 0 0 0);
  overflow: hidden; white-space: nowrap;
}

.hidden { display: none !important; }

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-danger); }
.nowrap { white-space: nowrap; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }

.divider {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-5) 0;
}

/* ------------------------------------------------------------
   4. Buttons 按钮（圆角 8px · 触摸目标 ≥44px）
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--touch-min);
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background var(--ease), color var(--ease),
    border-color var(--ease), box-shadow var(--ease), transform var(--ease);
  user-select: none;
}

.btn:active { transform: translateY(1px); }

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

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

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
}
.btn-ghost:hover { background: var(--color-primary-light); }

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover {
  background: var(--color-danger-dark);
  color: #fff;
}

.btn-light {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.65);
}
.btn-light:hover { background: rgba(255, 255, 255, 0.28); color: #fff; }

.btn-sm {
  min-height: 38px;
  padding: 7px 14px;
  font-size: 0.88rem;
}

.btn-lg {
  min-height: 52px;
  padding: 14px 28px;
  font-size: 1.06rem;
}

.btn-block { display: flex; width: 100%; }

.btn:disabled,
.btn.is-disabled,
.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.btn .icon,
.btn svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

/* ------------------------------------------------------------
   5. Forms 表单
   ------------------------------------------------------------ */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.94rem;
  margin-bottom: var(--space-2);
}

.form-label .req { color: var(--color-danger); }

.form-control,
input[type="text"],
input[type="email"],
input[type="number"],
input[type="date"],
input[type="search"],
input[type="tel"],
input[type="url"],
select,
textarea {
  display: block;
  width: 100%;
  min-height: var(--touch-min);
  padding: 10px 12px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-btn);
  transition: border-color var(--ease), box-shadow var(--ease);
  appearance: none;
}

textarea { min-height: 96px; resize: vertical; }

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1 1l6 6 6-6' fill='none' stroke='%235c6b68' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-control:focus,
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(36, 120, 105, 0.18);
}

.form-control::placeholder { color: #93a09d; }

.form-text {
  margin-top: var(--space-1);
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

.form-row {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.form-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: flex-end;
}
.form-inline .form-group { margin-bottom: 0; flex: 1 1 200px; }

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* 单选 / 复选 */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  min-height: var(--touch-min);
  padding: var(--space-2) 0;
  cursor: pointer;
}

.form-check-input {
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  flex: 0 0 auto;
  accent-color: var(--color-primary);
}

.form-check-label {
  font-size: 0.97rem;
  line-height: 1.45;
}

/* 校验态 */
.form-group.has-error .form-control,
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: var(--color-danger);
}
.form-group.has-error .form-control:focus,
.form-group.has-error input:focus {
  box-shadow: 0 0 0 3px rgba(214, 48, 49, 0.16);
}
.form-error {
  display: none;
  margin-top: var(--space-1);
  font-size: 0.84rem;
  color: var(--color-danger);
}
.form-group.has-error .form-error { display: block; }

/* ------------------------------------------------------------
   6. Tables 表格（移动端可横向滚动）
   ------------------------------------------------------------ */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: #fff;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 480px;
}

.table th,
.table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.table thead th {
  background: var(--color-primary-tint);
  color: var(--color-primary-darker);
  font-weight: 700;
  white-space: nowrap;
}

.table tbody tr:nth-child(even) { background: #fafcfc; }
.table tbody tr:hover { background: var(--color-primary-tint); }
.table tbody tr:last-child td { border-bottom: 0; }

.table-compact { font-size: 0.88rem; }
.table-compact th, .table-compact td { padding: 8px 10px; }

/* ------------------------------------------------------------
   7. Tags / Badges / Chips 标签
   ------------------------------------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-pill);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  white-space: nowrap;
}

.tag-solid { background: var(--color-primary); color: #fff; }
.tag-warning { background: var(--color-warning-light); color: #9a5a08; }
.tag-danger { background: var(--color-danger-light); color: var(--color-danger-dark); }
.tag-neutral { background: #eef2f1; color: var(--color-text-muted); }

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  padding: 1px 7px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  background: var(--color-danger);
  color: #fff;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  background: #fff;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--ease);
}

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

.chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ------------------------------------------------------------
   8. Notices 提示条
   ------------------------------------------------------------ */
.notice {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  padding: 14px 16px;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  background: #fff;
  font-size: 0.94rem;
}

.notice-icon {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 1px;
}

.notice-body { flex: 1; min-width: 0; }
.notice-body p:last-child { margin-bottom: 0; }
.notice-title { font-weight: 700; margin-bottom: 2px; }

.notice-info {
  background: var(--color-info-light);
  border-color: #cfe0f5;
  color: #1f4e85;
}
.notice-warning {
  background: var(--color-warning-light);
  border-color: #f3dcae;
  color: #8a5410;
}
.notice-danger {
  background: var(--color-danger-light);
  border-color: #f5c6c7;
  color: var(--color-danger-dark);
}
.notice-success {
  background: var(--color-primary-light);
  border-color: #bdddd5;
  color: var(--color-primary-darker);
}

/* ------------------------------------------------------------
   9. Cards 卡片（白卡 圆角 12px）
   ------------------------------------------------------------ */
.card {
  display: flex;
  flex-direction: column;
  background: var(--color-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--ease), transform var(--ease);
}

.card:hover { box-shadow: var(--shadow-card-hover); }

.card-img-top {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* 品种卡片照片头图变体（卡片本身已有 overflow:hidden + 圆角） */
.card--photo { overflow: hidden; }
.card--photo .card-img { display: block; width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }

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

.card-title {
  font-size: 1.08rem;
  margin-bottom: var(--space-2);
}

.card-title a { color: inherit; }
.card-title a:hover { color: var(--color-primary); }

.card-text {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  flex: 1;
  margin-bottom: var(--space-3);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-3);
}

.card-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: #fcfdfd;
}

.card-link {
  font-weight: 600;
  font-size: 0.92rem;
}

.card-link::after { content: " →"; }

/* 紧凑卡片变体 */
.card-flat { box-shadow: none; }
.card-flat:hover { box-shadow: var(--shadow-card); }
.card-clickable { cursor: pointer; }

/* ------------------------------------------------------------
   9b. Photo Cards 实物照片卡（图片 + 深色渐变遮罩 + 白字）
   禁止纯图标卡片：工具/教程/功能卡必须使用此类
   ------------------------------------------------------------ */
.photo-card {
  position: relative;
  display: block;
  min-height: 200px;
  border-radius: var(--radius-card);
  overflow: hidden;
  color: #fff;
  isolation: isolate;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--ease), transform var(--ease);
}

.photo-card:hover {
  color: #fff;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.photo-card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.photo-card-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    to top,
    rgba(15, 35, 31, 0.86) 0%,
    rgba(15, 35, 31, 0.45) 45%,
    rgba(15, 35, 31, 0.08) 78%
  );
}

.photo-card-body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.photo-card-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.85;
}

.photo-card-title {
  color: #fff;
  font-size: 1.12rem;
  margin: 0;
}

.photo-card-text {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.88rem;
  margin: 0;
  display: none;
}

.photo-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.photo-card-tags .tag {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  backdrop-filter: blur(2px);
}

/* 尺寸变体 */
.photo-card-sm { min-height: 150px; }
.photo-card-lg { min-height: 280px; }
.photo-card-wide { min-height: 220px; }

/* ------------------------------------------------------------
   10. Hero 首屏
   ------------------------------------------------------------ */
.hero {
  position: relative;
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    100deg,
    rgba(14, 33, 29, 0.88) 0%,
    rgba(14, 33, 29, 0.55) 55%,
    rgba(14, 33, 29, 0.25) 100%
  );
}

.hero-inner {
  padding: 64px 0 56px;
  max-width: 640px;
}

.hero-kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.16);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-4);
}

.hero-title {
  color: #fff;
  font-size: 1.9rem;
  margin-bottom: var(--space-4);
}

.hero-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.04rem;
  margin-bottom: var(--space-5);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Hero 紧凑变体（首页改版：压缩首屏垂直留白） */
.hero--compact .hero-inner { padding: 40px 0 32px; }
.hero--compact .hero-title { font-size: 1.65rem; margin-bottom: var(--space-3); }
.hero--compact .hero-text { margin-bottom: var(--space-4); }

@media (min-width: 768px) {
  .hero--compact .hero-inner { padding: 56px 0 44px; }
  .hero--compact .hero-title { font-size: 1.9rem; }
}

@media (min-width: 1440px) {
  .hero--compact .hero-inner { padding: 64px 0 52px; }
  .hero--compact .hero-title { font-size: 2.1rem; }
}

/* ------------------------------------------------------------
   11. Breadcrumb 面包屑
   ------------------------------------------------------------ */
.breadcrumb {
  padding: var(--space-3) 0;
  font-size: 0.85rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li { display: inline-flex; align-items: center; }

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin: 0 8px;
  color: var(--color-border-strong);
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-current="page"] { color: var(--color-text); }

/* ------------------------------------------------------------
   12. Header / Navigation / Drawer 顶部导航 & 汉堡抽屉
   ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: var(--shadow-header);
}

.nav-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--header-h);
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--color-primary-darker);
  margin-right: auto;
  min-height: var(--touch-min);
}

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

.brand-logo { width: 32px; height: 32px; flex: 0 0 auto; }
.brand-text { white-space: nowrap; }

/* 汉堡按钮 */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: var(--touch-min);
  height: var(--touch-min);
  padding: 10px;
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  margin: 0 auto;
  background: var(--color-primary-darker);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* 抽屉：移动端从右侧滑入 */
.nav-menu {
  position: fixed;
  top: var(--header-h);
  right: 0;
  bottom: 0;
  width: min(84vw, 340px);
  background: #fff;
  box-shadow: -8px 0 30px rgba(20, 50, 45, 0.18);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--ease), visibility var(--ease);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 1001;
}

.nav-menu.open { transform: translateX(0); visibility: visible; }

.nav-scrim {
  position: fixed;
  inset: var(--header-h) 0 0;
  background: rgba(15, 35, 31, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ease), visibility var(--ease);
  z-index: 1000;
}

.nav-scrim.open { opacity: 1; visibility: visible; }

.nav-list {
  list-style: none;
  margin: 0;
  padding: var(--space-3);
  flex: 1;
}

.nav-list > li { border-bottom: 1px solid var(--color-border); }
.nav-list > li:last-child { border-bottom: 0; }

.nav-list a {
  display: flex;
  align-items: center;
  min-height: var(--touch-min);
  padding: 11px var(--space-2);
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.97rem;
  border-radius: var(--radius-sm);
}

.nav-list a:hover { color: var(--color-primary); }

.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* 下拉（抽屉内展开） */
.nav-dropdown-toggle {
  width: 100%;
  justify-content: space-between;
}

.nav-dropdown-caret {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  transition: transform var(--ease);
}

.nav-dropdown.open .nav-dropdown-caret { transform: rotate(180deg); }

.nav-dropdown-menu {
  list-style: none;
  margin: 0;
  padding: 0 0 var(--space-2) var(--space-4);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--ease);
}

.nav-dropdown.open .nav-dropdown-menu { max-height: 200px; }
.nav-dropdown-menu a { font-weight: 500; font-size: 0.93rem; }

/* 会员入口 */
.member-link {
  color: var(--color-primary) !important;
  gap: var(--space-2);
}

.member-link .member-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-warning);
  flex: 0 0 auto;
}

/* 语言切换器（抽屉底部） */
.lang-switch {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.lang-switch button {
  flex: 1;
  min-height: var(--touch-min);
  padding: 8px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-btn);
  background: #fff;
  color: var(--color-text-muted);
  font-weight: 700;
}

.lang-switch button.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ------------------------------------------------------------
   13. Cookie Consent Banner Cookie 同意横幅
   ------------------------------------------------------------ */
.cookie-banner {
  position: fixed;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 1100;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card-hover);
  padding: var(--space-4);
  display: none;
}

.cookie-banner.open { display: block; }

.cookie-banner-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.cookie-banner-text p:last-child { margin-bottom: 0; }

.cookie-banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.cookie-banner-actions .btn { flex: 1 1 auto; min-width: 120px; }
.cookie-banner-more {
  flex: 0 0 auto;
  align-self: center;
  font-size: 0.85rem;
  font-weight: 600;
  padding: var(--space-2);
  min-height: var(--touch-min);
  display: inline-flex;
  align-items: center;
}

/* ------------------------------------------------------------
   14. Floating Action Buttons 悬浮按钮组
   ------------------------------------------------------------ */
.fab-group {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
}

.fab {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 0;
  background: var(--color-card);
  color: var(--color-primary);
  box-shadow: var(--shadow-fab);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--ease), color var(--ease), transform var(--ease);
}

.fab svg { width: 22px; height: 22px; }

.fab:hover { background: var(--color-primary-light); transform: translateY(-1px); }

.fab-top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
}

.fab-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }

.fab-star.active {
  background: var(--color-primary);
  color: #fff;
}

.fab-star.active:hover { background: var(--color-primary-dark); }

.fab-list .badge {
  position: absolute;
  top: -4px;
  right: -4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.fab-list { position: relative; }

/* ------------------------------------------------------------
   15. Modal 模态（收藏面板等）
   ------------------------------------------------------------ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1200;
  background: rgba(15, 35, 31, 0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ease), visibility var(--ease);
  padding: 0;
}

.modal-overlay.open { opacity: 1; visibility: visible; }

.modal {
  width: 100%;
  max-width: 560px;
  max-height: 82vh;
  background: #fff;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  display: flex;
  flex-direction: column;
  transform: translateY(24px);
  transition: transform var(--ease);
  overflow: hidden;
}

.modal-overlay.open .modal { transform: translateY(0); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.modal-title { margin: 0; font-size: 1.1rem; }

.modal-close {
  width: var(--touch-min);
  height: var(--touch-min);
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.modal-close:hover { background: var(--color-bg); color: var(--color-text); }
.modal-close svg { width: 20px; height: 20px; }

.modal-body {
  padding: var(--space-4);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* 收藏面板列表 */
.fav-list { list-style: none; margin: 0; padding: 0; }

.fav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.fav-item-link {
  flex: 1;
  min-width: 0;
  display: block;
  color: inherit;
}

.fav-item-link:hover { color: var(--color-primary); }

.fav-item-title {
  display: block;
  font-weight: 600;
  font-size: 0.96rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fav-item-meta {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.fav-item-type { font-weight: 600; }

.fav-item-remove {
  flex: 0 0 auto;
  width: var(--touch-min);
  height: var(--touch-min);
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.fav-item-remove:hover { background: var(--color-danger-light); color: var(--color-danger); }
.fav-item-remove svg { width: 19px; height: 19px; }

/* ------------------------------------------------------------
   16. Empty State 空态
   ------------------------------------------------------------ */
.empty-state {
  text-align: center;
  padding: var(--space-7) var(--space-4);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  color: var(--color-border-strong);
}

.empty-state-title {
  font-size: 1.08rem;
  margin-bottom: var(--space-2);
}

.empty-state-text {
  color: var(--color-text-muted);
  font-size: 0.93rem;
  margin: 0 auto var(--space-4);
  max-width: 420px;
}

.empty-state-action { margin-top: var(--space-2); }

/* ------------------------------------------------------------
   17. Footer 页脚
   ------------------------------------------------------------ */
.site-footer {
  margin-top: var(--space-8);
  background: #12352f;
  color: rgba(255, 255, 255, 0.78);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  padding: var(--space-7) 0 var(--space-5);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: var(--space-3);
}

.footer-brand-logo { width: 30px; height: 30px; }

.footer-about {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.68);
  margin: 0;
}

.footer-title {
  color: #fff;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li { margin-bottom: 2px; }

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
}

.footer-links a:hover { color: #fff; }

.footer-note {
  margin: var(--space-4) 0 0;
  padding: var(--space-4) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.9rem;
  color: #ffd9d9;
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-5);
  font-size: 0.83rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a { color: rgba(255, 255, 255, 0.75); }
.footer-contact { font-size: 0.83rem; }
.footer-contact a { word-break: break-all; }

/* ------------------------------------------------------------
   18. Prose / Article Detail / Tool Detail 正文 & 工具详情排版
   ------------------------------------------------------------ */
.prose {
  font-size: 1rem;
  line-height: 1.8;
}

.prose h2 {
  font-size: 1.35rem;
  margin: var(--space-6) 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-primary-light);
}

.prose h3 {
  font-size: 1.12rem;
  margin: var(--space-5) 0 var(--space-2);
}

.prose h4 { font-size: 1.02rem; }

.prose ul, .prose ol { padding-left: 1.5em; }
.prose li { margin-bottom: 6px; }

.prose blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-tint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-muted);
}

.prose code {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

.prose img { border-radius: var(--radius-card); }

.prose hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

/* 文章详情 */
.article-detail { max-width: 820px; margin: 0 auto; }

.article-header { margin-bottom: var(--space-5); }

.article-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-card);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-card);
}

.article-title { font-size: 1.7rem; margin-bottom: var(--space-3); }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin-bottom: var(--space-3);
}

.article-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.article-body { font-size: 1.02rem; }

.article-disclaimer {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-bg);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-card);
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin: var(--space-5) 0;
}

.related-section { margin-top: var(--space-7); }
.related-grid { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }

/* 工具详情/工具页布局 */
.tool-layout {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

.tool-panel {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
}

.tool-panel-title {
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tool-result {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-primary-tint);
  border-radius: var(--radius-card);
}

.tool-result-list { list-style: none; margin: 0; padding: 0; }
.tool-result-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}
.tool-result-list li:last-child { border-bottom: 0; }
.tool-result-value { font-weight: 700; color: var(--color-primary-dark); white-space: nowrap; }

.tool-chart-wrap {
  width: 100%;
  overflow-x: auto;
}
.tool-chart {
  width: 100%;
  min-width: 320px;
  height: auto;
}

/* 会员预埋区块 */
.member-teaser {
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  text-align: center;
  background: var(--color-primary-tint);
}

.member-teaser-title {
  font-size: 1.02rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.member-teaser-text {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: var(--space-2) 0 var(--space-3);
}

.member-free-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
}

/* 统计数字 */
.stat-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.stat {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ------------------------------------------------------------
   19. Ad Slots 广告位占位
   ------------------------------------------------------------ */
.ad-slot {
  display: block;
  margin: var(--space-5) 0;
  min-height: 100px;
}

.adsbygoogle { display: block; width: 100%; }

.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-card);
  background: var(--color-bg);
  color: var(--color-border-strong);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

/* ------------------------------------------------------------
   20. Misc Pages 其他页辅助
   ------------------------------------------------------------ */
.toc {
  background: var(--color-primary-tint);
  border-radius: var(--radius-card);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
}

.toc-title { font-size: 1rem; margin-bottom: var(--space-2); }
.toc ul { margin: 0; padding-left: 1.3em; font-size: 0.93rem; }

.faq-item { margin-bottom: var(--space-4); }
.faq-q { font-size: 1.02rem; margin-bottom: var(--space-2); }
.faq-a { color: var(--color-text-muted); margin: 0; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.filter-bar .form-group { flex: 1 1 220px; margin-bottom: 0; }
.filter-bar select, .filter-bar input { min-width: 0; }

.search-box { position: relative; }
.search-box .form-control { padding-left: 40px; }
.search-box-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.pay-card .pay-card-cover {
  aspect-ratio: 16 / 7;
  object-fit: cover;
}
.pay-price { font-size: 1.2rem; font-weight: 800; color: var(--color-primary); }

.content-list { list-style: none; margin: 0; padding: 0; }
.content-list li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.content-list li:last-child { border-bottom: 0; }

/* ------------------------------------------------------------
   20b. Responsive — 基准 360px：超窄屏防溢出兜底
   （移动优先：以上全部样式以 360px 视口为基准设计）
   ------------------------------------------------------------ */
@media (max-width: 359px) {
  html { font-size: 15px; }
  .container { padding: 0 var(--space-3); }
  .brand-text { max-width: 48vw; overflow: hidden; text-overflow: ellipsis; }
  .hero-title { font-size: 1.6rem; }
  .hero-inner { padding: 48px 0; }
  .photo-card { min-height: 170px; }
  .cookie-banner-actions .btn { min-width: calc(50% - 4px); }
}

/* ------------------------------------------------------------
   21. Responsive — ≥768px 平板
   ------------------------------------------------------------ */
@media (min-width: 768px) {
  .container { padding: 0 var(--space-5); }

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

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

  .section-title { font-size: 1.6rem; }
  .page-title { font-size: 2rem; }

  .photo-card-text { display: block; }
  .photo-card { min-height: 230px; }
  .photo-card-wide { min-height: 260px; }

  .hero-inner { padding: 96px 0 84px; }
  .hero-title { font-size: 2.5rem; }

  .modal-overlay { align-items: center; padding: var(--space-4); }
  .modal { border-radius: var(--radius-card); }

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: var(--space-6);
  }

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

  .article-title { font-size: 2.1rem; }

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

/* ≥1024px 桌面：导航横向展开，抽屉隐藏 */
@media (min-width: 1024px) {
  :root { --header-h: 64px; }

  .nav-toggle { display: none; }

  .nav-scrim { display: none; }

  .nav-menu {
    position: static;
    width: auto;
    box-shadow: none;
    transform: none;
    visibility: visible;
    flex-direction: row;
    align-items: center;
    overflow: visible;
    background: transparent;
  }

  .nav-list {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0;
    flex: 0 1 auto;
  }

  .nav-list > li { border-bottom: 0; position: relative; }

  .nav-list a { padding: 9px 11px; font-size: 0.9rem; min-height: 40px; }

  /* 桌面下拉：悬停/聚焦展开为浮层 */
  .nav-dropdown-caret { display: block; }

  .nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    padding: 6px;
    max-height: none;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card-hover);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
  }

  .nav-dropdown-menu a { min-height: var(--touch-min); padding: 9px 12px; }

  .nav-dropdown:hover .nav-dropdown-menu,
  .nav-dropdown:focus-within .nav-dropdown-menu,
  .nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  /* 桌面端让 caret 不旋转（整行悬停展开） */
  .nav-dropdown:hover .nav-dropdown-caret { transform: rotate(180deg); }

  .lang-switch {
    border-top: 0;
    padding: 0;
    flex: 0 0 auto;
  }

  .lang-switch button { flex: 0 0 auto; padding: 6px 12px; min-width: 48px; }

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

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

  .tool-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

/* ≥1440px 宽屏 */
@media (min-width: 1440px) {
  .container { max-width: 1260px; }
  .hero-title { font-size: 2.8rem; }
  .hero-inner { padding: 120px 0 104px; }
  .photo-card-lg { min-height: 320px; }
}

/* 用户偏好减少动效 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}