/* ============================================================
   今日看料 · 设计系统 (Design System)
   风格：现代杂志感 × 可爱圆润 × 专业可信
   主色：暖珊瑚橙 / 墨黑 / 奶油白 / 薄荷核验绿
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 色彩系统 */
  --ink: #1A1A2E;          /* 墨黑 - 主文字 */
  --ink-soft: #2D2D44;     /* 次级文字 */
  --muted: #6B6B80;        /* 辅助文字 */
  --line: #E8E0D5;         /* 分割线 */
  --cream: #FAF6F0;        /* 奶油白 - 主背景 */
  --paper: #FFFFFF;        /* 纸白 - 卡片 */
  --coral: #FF6B4A;        /* 珊瑚橙 - 主品牌 */
  --coral-deep: #E8542F;   /* 深珊瑚 */
  --coral-soft: #FFE8E0;   /* 珊瑚浅底 */
  --amber: #FFB84A;        /* 暖琥珀 */
  --amber-soft: #FFF3DC;   /* 琥珀浅底 */
  --mint: #2DD4BF;         /* 薄荷核验绿 */
  --mint-deep: #14B8A6;    /* 深薄荷 */
  --mint-soft: #D6F7F2;    /* 薄荷浅底 */
  --rose: #FF5C8A;         /* 玫粉 */
  --grape: #7C5CFF;        /* 葡萄紫 - 用于标签点缀 */

  /* 渐变 */
  --grad-coral: linear-gradient(135deg, #FF6B4A 0%, #FFB84A 100%);
  --grad-coral-deep: linear-gradient(135deg, #E8542F 0%, #FF6B4A 100%);
  --grad-mint: linear-gradient(135deg, #2DD4BF 0%, #7C5CFF 100%);
  --grad-ink: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 100%);
  --grad-hero: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 45%, #FF6B4A 140%);

  /* 字体 */
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 圆角 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-pill: 999px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.12);
  --shadow-coral: 0 12px 32px rgba(255, 107, 74, 0.32);
  --shadow-glow: 0 0 40px rgba(255, 107, 74, 0.15);

  /* 容器 */
  --container: 1200px;
  --nav-h: 72px;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
::selection { background: var(--coral); color: #fff; }

/* ---------- 布局工具 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; }
.section-tight { padding: 56px 0; }
.center { text-align: center; }

/* ---------- 排版 ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 400; line-height: 1.25; color: var(--ink); letter-spacing: 0.01em; }
.display { font-family: var(--font-display); font-size: clamp(2.4rem, 6vw, 4.2rem); line-height: 1.1; }
.h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.h3 { font-size: clamp(1.3rem, 2.5vw, 1.7rem); }
.lead { font-size: 1.15rem; color: var(--muted); line-height: 1.7; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--coral-deep); padding: 6px 14px; border-radius: var(--r-pill);
  background: var(--coral-soft);
}
.eyebrow.mint { color: var(--mint-deep); background: var(--mint-soft); }
.eyebrow.amber { color: #B8791A; background: var(--amber-soft); }

.text-coral { color: var(--coral); }
.text-mint { color: var(--mint-deep); }
.text-grad {
  background: var(--grad-coral);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: 0.98rem;
  padding: 14px 28px; border-radius: var(--r-pill);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap; cursor: pointer; border: none;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad-coral); color: #fff; box-shadow: var(--shadow-coral); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(255,107,74,0.42); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.btn-ghost { background: var(--paper); color: var(--ink); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--coral); color: var(--coral); transform: translateY(-2px); }
.btn-mint { background: var(--grad-mint); color: #fff; box-shadow: 0 12px 32px rgba(45,212,191,0.3); }
.btn-mint:hover { transform: translateY(-3px); }
.btn-lg { padding: 17px 36px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ---------- 导航栏 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: rgba(250, 246, 240, 0.82);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: all 0.4s ease;
}
.nav.scrolled { background: rgba(250, 246, 240, 0.95); border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.nav-inner { max-width: var(--container); height: 100%; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 1.4rem; color: var(--ink); }
.nav-logo-icon {
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--grad-coral); display: grid; place-items: center;
  color: #fff; font-family: var(--font-display); font-size: 1.2rem;
  box-shadow: var(--shadow-coral);
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px; border-radius: var(--r-pill); font-weight: 500; font-size: 0.95rem;
  color: var(--ink-soft); transition: all 0.25s ease;
}
.nav-links a:hover { color: var(--coral); background: var(--coral-soft); }
.nav-links a.active { color: var(--coral-deep); background: var(--coral-soft); font-weight: 600; }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-cta .btn { padding: 10px 20px; font-size: 0.9rem; }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 12px; align-items: center; justify-content: center; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; position: relative; transition: 0.3s; }
.nav-toggle span::before, .nav-toggle span::after { content: ''; position: absolute; left: 0; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: 0.3s; }
.nav-toggle span::before { top: -7px; } .nav-toggle span::after { top: 7px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: rgba(255,255,255,0.7); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 0.92rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 { color: #fff; font-family: var(--font-body); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 0.92rem; transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--coral); }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.12); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; }
.footer-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.footer-badge { font-size: 0.78rem; padding: 4px 10px; border-radius: var(--r-pill); background: rgba(255,255,255,0.08); }

/* ---------- 卡片 ---------- */
.card { background: var(--paper); border-radius: var(--r-lg); box-shadow: var(--shadow-md); overflow: hidden; transition: all 0.4s cubic-bezier(0.4,0,0.2,1); border: 1px solid var(--line); }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

/* ---------- 标签/徽章 ---------- */
.tag { display: inline-flex; align-items: center; gap: 5px; font-size: 0.74rem; font-weight: 600; padding: 4px 11px; border-radius: var(--r-pill); letter-spacing: 0.02em; }
.tag-coral { background: var(--coral-soft); color: var(--coral-deep); }
.tag-amber { background: var(--amber-soft); color: #B8791A; }
.tag-mint { background: var(--mint-soft); color: var(--mint-deep); }
.tag-grape { background: #ECE6FF; color: var(--grape); }
.tag-rose { background: #FFE0EA; color: var(--rose); }
.tag-ink { background: #ECEAF2; color: var(--ink-soft); }
.tag-dot::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.tag-hot::before { content: '🔥'; }

/* ---------- 滚动渐入动画 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }
.reveal.delay-4 { transition-delay: 0.4s; }
.reveal.delay-5 { transition-delay: 0.5s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 背景特效 ---------- */
.noise-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 1; opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; pointer-events: none; z-index: 0; }

/* ---------- 通用网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 数字大字 ---------- */
.stat-num { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem); line-height: 1; color: var(--coral); }

/* ---------- 章节标题区 ---------- */
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; }
.section-head .h2 { margin: 16px 0 14px; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); padding: 16px; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%); transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
    max-height: calc(100vh - var(--nav-h)); overflow-y: auto;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 14px 16px; border-radius: var(--r-md); }
  .nav-toggle { display: flex; }
  .nav-cta .btn-ghost { display: none; }
  .section { padding: 56px 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .grid-4 { grid-template-columns: 1fr; }
  .btn { padding: 12px 22px; font-size: 0.92rem; }
}