/* ====== 品牌色板 ====== */
:root {
    --primary: #2D6A4F;       /* 翡翠绿主色 */
    --primary-light: #40916C;
    --primary-dark: #1B4332;
    --secondary: #8B5CF6;     /* 檀紫辅色 */
    --secondary-light: #A78BFA;
    --accent: #F59E0B;        /* 琥珀金 */
    --bg: #F8FAF5;
    --bg-alt: #F0F7F0;
    --text: #1E293B;
    --text-light: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --white: #FFFFFF;
    --shadow: 0 4px 24px rgba(45, 106, 79, 0.08);
    --shadow-hover: 0 8px 32px rgba(45, 106, 79, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-cn: 'Noto Serif SC', 'Georgia', serif;
    --font-en: 'Inter', system-ui, sans-serif;
}

/* ====== 全局重置 ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-en), var(--font-cn), sans-serif; color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { font-family: var(--font-cn); font-weight: 700; line-height: 1.3; }

/* ====== 容器 ====== */
.app-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ====== 头部导航 ====== */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(248, 250, 245, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.header-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 20px;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 36px; height: 36px; }
.logo-text { font-family: var(--font-cn); font-size: 20px; font-weight: 700; color: var(--primary); }
.main-nav { display: flex; gap: 28px; }
.main-nav .nav-link { font-size: 15px; font-weight: 500; color: var(--text-light); padding: 6px 0; position: relative; }
.main-nav .nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary); transition: var(--transition); }
.main-nav .nav-link:hover, .main-nav .nav-link.active { color: var(--primary); }
.main-nav .nav-link.active::after, .main-nav .nav-link:hover::after { width: 100%; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

/* ====== Hero ====== */
.hero { position: relative; min-height: 85vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 100px 20px 80px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #E8F5E9 0%, #F1F8E9 40%, #FFF8E1 100%); z-index: 0; }
.hero-bg::before { content: ''; position: absolute; top: -20%; right: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(45,106,79,0.06) 0%, transparent 70%); border-radius: 50%; }
.hero-bg::after { content: ''; position: absolute; bottom: -10%; left: -5%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(139,92,246,0.05) 0%, transparent 70%); border-radius: 50%; }
.hero-content { position: relative; z-index: 1; max-width: 700px; }
.hero-logo { width: 200px; margin: 0 auto 24px; }
.hero-slogan { font-family: var(--font-cn); font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 16px; letter-spacing: 2px; }
.hero-desc { font-size: 17px; color: var(--text-light); max-width: 500px; margin: 0 auto 32px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ====== Button ====== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; font-size: 15px; font-weight: 600; border-radius: 10px; transition: var(--transition); cursor: pointer; border: 2px solid transparent; font-family: var(--font-en); }
.btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(45,106,79,0.3); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); transform: translateY(-2px); }

/* ====== Section ====== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); border-radius: 24px; margin: 20px 0; padding: 60px 40px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-title { font-size: 32px; color: var(--primary); margin-bottom: 8px; }
.section-subtitle { font-size: 16px; color: var(--text-light); }
.section-footer { text-align: center; margin-top: 40px; }

/* ====== 卡片网格 ====== */
.features-grid, .articles-grid, .tea-grid, .tools-grid {
    display: grid;
    gap: 24px;
}
.features-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.articles-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.tea-grid, .tools-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

/* ====== 特色卡片 ====== */
.feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.feature-icon { font-size: 40px; margin-bottom: 16px; display: block; }
.feature-card h3 { font-size: 20px; color: var(--primary); margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ====== 文章卡片 ====== */
.article-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    display: flex; flex-direction: column;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.article-card .meta { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; display: flex; gap: 10px; }
.article-card .meta .tag { background: var(--bg-alt); padding: 2px 10px; border-radius: 20px; color: var(--primary); font-weight: 500; }
.article-card h3 { font-size: 18px; margin-bottom: 8px; }
.article-card h3 a { color: var(--text); }
.article-card h3 a:hover { color: var(--primary); }
.article-card p { font-size: 14px; color: var(--text-light); flex: 1; margin-bottom: 12px; }
.article-card .read-more { font-size: 14px; font-weight: 600; color: var(--primary); align-self: flex-start; }

/* ====== 茶叶/茶具卡片 ====== */
.tea-card, .tool-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.tea-card:hover, .tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.tea-card h3, .tool-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 6px; }
.tea-card .sub, .tool-card .sub { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.tea-card p, .tool-card p { font-size: 14px; color: var(--text-light); margin-bottom: 12px; }
.tea-card .price, .tool-card .price { font-size: 18px; font-weight: 700; color: var(--accent); }

/* ====== 页面 Hero（内页） ====== */
.page-hero { padding: 120px 20px 60px; text-align: center; background: linear-gradient(135deg, #E8F5E9, #F1F8E9); }
.page-hero h1 { font-size: 36px; color: var(--primary); margin-bottom: 8px; }
.page-hero p { font-size: 16px; color: var(--text-light); }

/* ====== 页脚 ====== */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.85); padding: 60px 20px 20px; margin-top: 40px; border-radius: 24px 24px 0 0; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.footer-brand .footer-logo { width: 140px; margin-bottom: 12px; filter: brightness(0) invert(1); }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 360px; }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.footer-col h4 { font-family: var(--font-cn); font-size: 16px; color: var(--white); margin-bottom: 12px; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.7); margin-bottom: 8px; }
.footer-col a:hover { color: var(--white); }
.footer-bottom { text-align: center; padding-top: 30px; margin-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 13px; color: rgba(255,255,255,0.5); }

/* ====== 响应式 ====== */
@media (max-width: 768px) {
    .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg); flex-direction: column; padding: 16px 20px; gap: 12px; border-bottom: 1px solid var(--border); }
    .main-nav.open { display: flex; }
    .hamburger { display: flex; }
    .hero { min-height: 70vh; padding: 80px 16px 60px; }
    .hero-slogan { font-size: 28px; }
    .hero-logo { width: 160px; }
    .section-title { font-size: 26px; }
    .section-alt { padding: 40px 20px; }
    .features-grid, .articles-grid, .tea-grid, .tools-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 30px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .page-hero { padding: 100px 16px 40px; }
    .page-hero h1 { font-size: 28px; }
}

@media (max-width: 480px) {
    .header-inner { height: 56px; }
    .logo-text { font-size: 17px; }
    .hero-slogan { font-size: 24px; }
    .hero-desc { font-size: 15px; }
    .btn { padding: 10px 20px; font-size: 14px; }
    .section { padding: 50px 0; }
    .footer-links { grid-template-columns: 1fr; }
}