/* ========== 基础变量 ========== */
:root {
  --c-primary: #2f6b5e;        /* 安庆师大绿 */
  --c-primary-dark: #245349;
  --c-primary-light: #e7f2ee;
  --c-accent: #f0a04b;         /* 暖橙点缀 */
  --c-bg: #fafafa;
  --c-surface: #ffffff;
  --c-text: #1f2a24;
  --c-text-soft: #5c6b62;
  --c-text-mute: #94a299;
  --c-border: #e7ebe8;
  --c-shadow: 0 6px 24px rgba(36, 83, 73, 0.06);
  --c-shadow-hover: 0 12px 36px rgba(36, 83, 73, 0.12);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --maxw: 1180px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 760px; }

/* ========== 顶部导航 ========== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff; font-weight: 700; font-size: 18px;
  display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(47,107,94,0.3);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 16px; font-weight: 700; }
.brand-text em { font-size: 11px; color: var(--c-text-mute); font-style: normal; letter-spacing: 0.5px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  padding: 8px 14px; border-radius: 999px; font-size: 14.5px;
  color: var(--c-text-soft); transition: all 0.2s;
}
.nav-link:hover { color: var(--c-primary); background: var(--c-primary-light); }
.nav-link.active { color: #fff; background: var(--c-primary); }
.nav-cta { background: var(--c-accent); color: #fff; }
.nav-cta:hover { background: #e8922a; color: #fff; }
.nav-link.active.nav-cta { background: var(--c-accent); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--c-text); border-radius: 2px; transition: 0.3s; }

/* ========== 页面切换 ========== */
.page { display: none; animation: fadeUp 0.4s ease; }
.page.active { display: block; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ========== Hero ========== */
.hero {
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(240,160,75,0.18), transparent 60%),
    radial-gradient(900px 600px at 0% 10%, rgba(47,107,94,0.18), transparent 55%),
    linear-gradient(180deg, #f3f8f5 0%, var(--c-bg) 100%);
  padding: 72px 0 56px;
}
.hero-inner { text-align: center; max-width: 760px; }
.hero-eyebrow {
  display: inline-block; margin: 0 0 14px;
  padding: 5px 14px; border-radius: 999px;
  background: #fff; border: 1px solid var(--c-border);
  color: var(--c-primary); font-size: 12.5px; letter-spacing: 1px;
}
.hero-title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin: 0 0 18px; letter-spacing: -0.5px; }
.hero-sub { color: var(--c-text-soft); font-size: 16px; margin: 0 auto 28px; max-width: 620px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 11px 22px; border-radius: 999px; font-size: 14.5px; font-weight: 600;
  transition: all 0.2s; border: 1px solid transparent;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(47,107,94,0.25); }
.btn-ghost { background: transparent; border-color: var(--c-border); color: var(--c-text-soft); }
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-small { padding: 7px 14px; font-size: 13px; }

/* ========== 栏目入口卡片 ========== */
.section-head { text-align: center; margin: 56px 0 28px; }
.section-head h2 { font-size: 26px; margin: 0 0 6px; font-weight: 800; }
.section-head p { color: var(--c-text-mute); margin: 0; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 22px; }
.card-grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.portal-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius-lg); padding: 28px 24px;
  transition: all 0.25s; position: relative; overflow: hidden;
}
.portal-card:hover { transform: translateY(-4px); box-shadow: var(--c-shadow-hover); border-color: transparent; }
.portal-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; font-size: 24px; font-weight: 800; color: #fff;
  margin-bottom: 16px;
}
.portal-card:nth-child(1) .portal-icon { background: linear-gradient(135deg, #2f6b5e, #3d8a78); }
.portal-card:nth-child(2) .portal-icon { background: linear-gradient(135deg, #f0a04b, #ec6d6d); }
.portal-card:nth-child(3) .portal-icon { background: linear-gradient(135deg, #5b8def, #7b6ef0); }
.portal-card h3 { margin: 0 0 8px; font-size: 18px; }
.portal-card p { margin: 0 0 14px; color: var(--c-text-soft); font-size: 14px; }
.portal-more { color: var(--c-primary); font-size: 13.5px; font-weight: 600; }

/* ========== 栏目 Banner ========== */
.page-banner { padding: 48px 0 32px; }
.banner-campus { background: linear-gradient(135deg, #e7f2ee 0%, #f5f9f6 100%); }
.banner-pets { background: linear-gradient(135deg, #fff1e3 0%, #fff7f0 100%); }
.banner-food { background: linear-gradient(135deg, #eef3ff 0%, #f5f7ff 100%); }
.banner-submit { background: linear-gradient(135deg, #f0eaf6 0%, #f7f4fb 100%); }
.banner-eyebrow { color: var(--c-primary); font-size: 12.5px; letter-spacing: 2px; margin: 0 0 8px; text-transform: uppercase; }
.banner-pets .banner-eyebrow { color: #c47a2d; }
.banner-food .banner-eyebrow { color: #4a63c4; }
.banner-submit .banner-eyebrow { color: #7a5fa8; }
.page-banner h2 { font-size: 30px; margin: 0 0 8px; font-weight: 800; }
.banner-sub { color: var(--c-text-soft); margin: 0; max-width: 640px; }

/* ========== 工具条 ========== */
.toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin: 32px 0 24px;
}
.filter-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  padding: 6px 16px; border-radius: 999px; font-size: 13px;
  background: var(--c-surface); border: 1px solid var(--c-border);
  color: var(--c-text-soft); transition: 0.2s;
}
.tag:hover { border-color: var(--c-primary); color: var(--c-primary); }
.tag.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ========== 文章卡片 ========== */
.article-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); overflow: hidden;
  transition: all 0.25s; display: flex; flex-direction: column;
  cursor: pointer;
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--c-shadow-hover); border-color: transparent; }
.card-cover { aspect-ratio: 16/9; overflow: hidden; background: #eee; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: 0.4s; }
.article-card:hover .card-cover img { transform: scale(1.05); }
.card-cover.fallback { display: grid; place-items: center; background: linear-gradient(135deg, #d9e8e2, #e7f2ee); color: var(--c-primary); font-size: 28px; font-weight: 800; }
.card-body { padding: 18px 18px 20px; flex: 1; display: flex; flex-direction: column; }
.card-tag {
  display: inline-block; padding: 3px 10px; border-radius: 6px;
  background: var(--c-primary-light); color: var(--c-primary);
  font-size: 12px; font-weight: 600; margin-bottom: 10px; align-self: flex-start;
}
.card-title { font-size: 16.5px; font-weight: 700; margin: 0 0 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-excerpt { color: var(--c-text-soft); font-size: 13.5px; margin: 0 0 14px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12.5px; color: var(--c-text-mute); }
.card-author { display: flex; align-items: center; gap: 8px; }
.author-avatar { width: 24px; height: 24px; border-radius: 50%; background: var(--c-primary-light); color: var(--c-primary); display: grid; place-items: center; font-size: 12px; font-weight: 700; }

/* ========== 萌宠卡片 ========== */
.pet-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 22px; }
.pet-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: all 0.25s; cursor: pointer;
}
.pet-card:hover { transform: translateY(-3px); box-shadow: var(--c-shadow-hover); border-color: transparent; }
.pet-photo { aspect-ratio: 1/1; overflow: hidden; background: #eee; position: relative; }
.pet-photo img { width: 100%; height: 100%; object-fit: cover; transition: 0.4s; }
.pet-card:hover .pet-photo img { transform: scale(1.06); }
.pet-photo.fallback { display: grid; place-items: center; background: linear-gradient(135deg, #ffe8d3, #fff1e3); font-size: 40px; }
.pet-badge {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 600;
  backdrop-filter: blur(6px); background: rgba(255,255,255,0.9);
}
.pet-badge.cat { color: #c47a2d; }
.pet-badge.dog { color: #4a63c4; }
.pet-body { padding: 18px; }
.pet-name { font-size: 17px; font-weight: 700; margin: 0 0 4px; display: flex; align-items: center; gap: 8px; }
.pet-gender { font-size: 14px; }
.pet-gender.male { color: #4a63c4; }
.pet-gender.female { color: #e878a6; }
.pet-meta { display: flex; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: var(--c-text-mute); margin: 0 0 10px; }
.pet-meta span { display: inline-flex; align-items: center; gap: 4px; }
.pet-desc { font-size: 13.5px; color: var(--c-text-soft); margin: 0; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pet-location { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--c-border); font-size: 12.5px; color: var(--c-primary); display: flex; align-items: center; gap: 6px; }

/* ========== 美食卡片 ========== */
.food-card .card-cover { aspect-ratio: 16/10; }
.food-rating {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--c-accent); font-weight: 700; font-size: 14px;
}
.food-price { color: var(--c-accent); font-weight: 700; }

/* ========== 投稿表单 ========== */
.submit-form { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--c-shadow); }
.form-row { margin-bottom: 20px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--c-text); }
.optional { font-weight: 400; color: var(--c-text-mute); font-size: 12.5px; margin-left: 4px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 11px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--c-border); background: #fbfcfb; font-size: 14px;
  color: var(--c-text); transition: 0.2s;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--c-primary); background: #fff; box-shadow: 0 0 0 3px rgba(47,107,94,0.12);
}
.form-row textarea { resize: vertical; min-height: 160px; line-height: 1.7; }
.form-tip { margin: 6px 0 0; font-size: 12px; color: var(--c-text-mute); text-align: right; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-check label { display: flex !important; align-items: center; gap: 8px; font-weight: 400 !important; color: var(--c-text-soft); }
.form-check input { width: auto !important; }
.form-actions { display: flex; gap: 12px; margin-top: 8px; }
.form-notice {
  margin-top: 18px; padding: 14px 18px; border-radius: var(--radius-sm);
  font-size: 14px; text-align: center;
}
.form-notice.success { background: var(--c-primary-light); color: var(--c-primary-dark); border: 1px solid #bcd9cf; }
.form-notice.error { background: #fdeceb; color: #c0392b; border: 1px solid #f5c6c0; }

/* ========== 详情弹层 ========== */
.modal { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; padding: 24px; }
.modal.open { display: flex; animation: fadeUp 0.25s ease; }
.modal-mask { position: absolute; inset: 0; background: rgba(20,40,33,0.55); backdrop-filter: blur(4px); }
.modal-panel {
  position: relative; width: 100%; max-width: 720px; max-height: 88vh; overflow: hidden;
  background: var(--c-surface); border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px rgba(0,0,0,0.3); display: flex; flex-direction: column;
}
.modal-close {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.9); font-size: 22px; line-height: 1; color: var(--c-text);
  display: grid; place-items: center; transition: 0.2s;
}
.modal-close:hover { background: var(--c-primary); color: #fff; }
.modal-body { overflow-y: auto; }
.detail-cover { width: 100%; aspect-ratio: 16/8; object-fit: cover; background: #eee; }
.detail-content { padding: 28px 32px 36px; }
.detail-tag { display: inline-block; padding: 4px 12px; border-radius: 6px; background: var(--c-primary-light); color: var(--c-primary); font-size: 12px; font-weight: 600; margin-bottom: 12px; }
.detail-title { font-size: 24px; font-weight: 800; margin: 0 0 12px; line-height: 1.3; }
.detail-meta { display: flex; align-items: center; gap: 12px; color: var(--c-text-mute); font-size: 13.5px; margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--c-border); }
.detail-text { font-size: 15px; line-height: 1.85; color: var(--c-text-soft); white-space: pre-wrap; }
.detail-pet-info { background: #faf8f5; border-radius: var(--radius); padding: 18px 20px; margin-bottom: 20px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 18px; font-size: 14px; }
.detail-pet-info .label { color: var(--c-text-mute); font-size: 12.5px; }
.detail-pet-info .value { color: var(--c-text); font-weight: 600; }

/* ========== Footer ========== */
.site-footer { background: #1c2823; color: #b6c4ba; margin-top: 64px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 40px 24px; }
.footer-brand strong { color: #fff; font-size: 16px; }
.footer-brand p { margin: 6px 0 0; font-size: 13px; }
.footer-meta p { margin: 4px 0; font-size: 13px; }

/* ========== 空状态 ========== */
.empty-state { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--c-text-mute); }
.empty-state .icon { font-size: 40px; margin-bottom: 12px; opacity: 0.5; }

/* ========== 响应式 ========== */
@media (max-width: 760px) {
  .container { padding: 0 18px; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 12px 18px; gap: 4px; border-bottom: 1px solid var(--c-border);
    box-shadow: 0 12px 24px rgba(0,0,0,0.06); transform: translateY(-12px); opacity: 0; pointer-events: none; transition: 0.25s;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-link { padding: 12px 16px; border-radius: 8px; }
  .hero { padding: 48px 0 40px; }
  .hero-actions .btn { width: 100%; }
  .submit-form { padding: 22px; }
  .detail-content { padding: 22px; }
  .detail-title { font-size: 20px; }
}