/*
Theme Name: Bailing Marketing
Theme URI: https://bailing.wang
Author: Bailing Team
Author URI: https://bailing.wang
Description: 百灵外语营销主题 — AI 驱动的多语种学习平台品牌站。编辑式雅致 × 科技未来感设计，午夜墨蓝 + 暖金点缀，适配手机端。
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: bailing-marketing
Tags: education, marketing, one-page, responsive, custom-colors, custom-menu, featured-images, translation-ready
*/

/* ============================================
   百灵外语营销主题 · 设计系统
   美学方向：编辑式雅致 × 科技未来感
   ============================================ */

/* ---------- 1. 设计令牌（CSS 变量） ---------- */
:root {
  /* 色彩系统 */
  --c-midnight: #0A1628;
  --c-navy: #13284C;
  --c-navy-soft: #1B3358;
  --c-gold: #D4A574;
  --c-gold-light: #E8C896;
  --c-gold-deep: #B8895A;
  --c-cream: #F5F0E8;
  --c-cream-warm: #FAF6EF;
  --c-fog: #8B9BB4;
  --c-fog-light: #B5C0D0;
  --c-white: #FAFBFC;
  --c-line: rgba(212, 165, 116, 0.18);
  --c-line-soft: rgba(139, 155, 180, 0.18);
  --c-line-dark: rgba(255, 255, 255, 0.08);

  /* 语义色 */
  --bg-primary: var(--c-midnight);
  --bg-secondary: var(--c-navy);
  --bg-light: var(--c-cream);
  --bg-light-warm: var(--c-cream-warm);
  --text-on-dark: var(--c-white);
  --text-on-dark-soft: var(--c-fog-light);
  --text-on-light: var(--c-midnight);
  --text-on-light-soft: var(--c-fog);
  --accent: var(--c-gold);
  --accent-light: var(--c-gold-light);

  /* 字体 */
  --font-display: 'Fraunces', 'Noto Serif SC', Georgia, serif;
  --font-body: 'Manrope', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* 字号阶梯 */
  --fs-hero: clamp(2.6rem, 6vw, 5rem);
  --fs-h1: clamp(2rem, 4vw, 3.2rem);
  --fs-h2: clamp(1.7rem, 3vw, 2.5rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.6rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-tiny: 0.75rem;

  /* 间距 */
  --space-section: clamp(4rem, 8vw, 7rem);
  --space-gutter: clamp(1.2rem, 4vw, 2rem);
  --container-max: 1280px;
  --container-narrow: 760px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* 阴影 */
  --shadow-soft: 0 4px 24px rgba(10, 22, 40, 0.08);
  --shadow-mid: 0 8px 40px rgba(10, 22, 40, 0.12);
  --shadow-deep: 0 20px 60px rgba(10, 22, 40, 0.25);
  --shadow-gold: 0 8px 32px rgba(212, 165, 116, 0.25);

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 0.4s;
}

/* ---------- 2. 重置与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }
html.no-smooth { scroll-behavior: auto; }
html:not(.no-smooth) { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text-on-light);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a { color: var(--accent); text-decoration: none; transition: color var(--dur) var(--ease-soft); }
a:hover { color: var(--accent-light); }

ul, ol { list-style: none; }

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

input, select, textarea { font-family: inherit; font-size: inherit; }

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { margin-bottom: 1rem; }

::selection { background: var(--c-gold); color: var(--c-midnight); }

/* ---------- 4. 布局容器 ---------- */
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-gutter); }
.container-narrow { max-width: var(--container-narrow); }

.section { padding: var(--space-section) 0; position: relative; }
.section-head { max-width: 760px; margin-bottom: 3.5rem; }
.section-head-light .section-eyebrow,
.section-head-light .section-title,
.section-head-light .section-desc { color: var(--text-on-dark); }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-body); font-size: var(--fs-small); font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.2rem;
}
.section-eyebrow::before { content: ''; width: 28px; height: 1px; background: var(--accent); }
.section-title { font-size: var(--fs-h2); color: var(--text-on-light); margin-bottom: 1rem; line-height: 1.2; }
.section-desc { font-size: 1.05rem; color: var(--text-on-light-soft); line-height: 1.7; }
.section-head-light .section-desc { color: var(--text-on-dark-soft); }
.section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; max-width: 100%; }

/* 各 section 背景 */
.languages-section { background: var(--bg-light-warm); }
.ai-section { background: var(--bg-primary); color: var(--text-on-dark); }
.ai-section .section-title { color: var(--text-on-dark); }
.ai-section .section-desc { color: var(--text-on-dark-soft); }
.courses-section { background: var(--bg-light); }
.stats-section { background: var(--c-navy); color: var(--text-on-dark); }
.stats-section .section-title { color: var(--text-on-dark); }
.stats-section .section-desc { color: var(--text-on-dark-soft); }
.voices-section { background: var(--bg-light-warm); }
.posts-section { background: var(--bg-light); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.7rem; font-family: var(--font-body); font-size: var(--fs-small);
  font-weight: 600; letter-spacing: 0.02em; border-radius: var(--radius-sm);
  transition: all var(--dur) var(--ease-out); cursor: pointer; white-space: nowrap;
  min-height: 46px; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--c-midnight); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-gold); color: var(--c-midnight); }
.btn-gold { background: var(--accent); color: var(--c-midnight); }
.btn-gold:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-gold); color: var(--c-midnight); }
.btn-outline { background: transparent; color: var(--text-on-light); border-color: var(--c-line-soft); }
.btn-outline:hover { color: var(--accent); border-color: var(--accent); }
.ai-section .btn-outline, .stats-section .btn-outline, .cta-section .btn-outline { color: var(--text-on-dark); border-color: var(--c-line-dark); }
.ai-section .btn-outline:hover, .stats-section .btn-outline:hover, .cta-section .btn-outline:hover { color: var(--accent); border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-ghost:hover { background: var(--accent); color: var(--c-midnight); }
.btn-lg { padding: 1.05rem 2.2rem; font-size: 1rem; min-height: 54px; }
.btn-block { display: flex; width: 100%; }
.btn-loading { display: none; }
.btn.is-loading .btn-text { display: none; }
.btn.is-loading .btn-loading { display: inline; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- 6. 导航栏 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.3rem 0; transition: all var(--dur) var(--ease-soft);
  background: transparent;
}
.site-header.is-scrolled {
  background: rgba(10, 22, 40, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--c-line);
  padding: 0.85rem 0;
}
.site-header.is-hidden { transform: translateY(-100%); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.nav-brand { flex-shrink: 0; }
.brand-link { display: flex; align-items: center; gap: 0.7rem; color: var(--c-white); }
.brand-link:hover { color: var(--c-white); }
.brand-mark {
  width: 38px; height: 38px; border-radius: 9px;
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-deep));
  display: grid; place-items: center;
  color: var(--c-midnight); font-family: var(--font-display); font-weight: 700; font-size: 1.2rem;
  flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; color: var(--c-white); }
.brand-slogan { font-size: 0.7rem; color: var(--text-on-dark-soft); letter-spacing: 0.05em; }
.custom-logo-link img { max-height: 44px; width: auto; }

.nav { display: flex; align-items: center; }
.nav-menu { display: flex; align-items: center; gap: 2rem; }
.nav-menu a { color: var(--text-on-dark-soft); font-size: var(--fs-small); font-weight: 500; position: relative; padding: 0.4rem 0; }
.nav-menu a::after { content: ''; position: absolute; left: 0; bottom: -2px; width: 0; height: 1.5px; background: var(--accent); transition: width var(--dur) var(--ease-out); }
.nav-menu a:hover { color: var(--c-white); }
.nav-menu a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 0.7rem; }
.nav-cta-phone { padding: 0.55rem 1rem; font-size: var(--fs-small); }
.nav-cta-phone svg { width: 16px; height: 16px; }
.nav-cta-trial { padding: 0.6rem 1.3rem; font-size: var(--fs-small); }

.nav-toggle { display: none; width: 44px; height: 44px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; padding: 0; }
.nav-toggle-bar { width: 24px; height: 2px; background: var(--c-white); border-radius: 2px; transition: all var(--dur) var(--ease-out); }
.nav-toggle.is-active .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle.is-active .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉菜单 */
.mobile-menu {
  position: fixed; inset: 0; z-index: 99;
  background: var(--c-midnight);
  display: flex; flex-direction: column;
  opacity: 0; visibility: hidden; transition: opacity 0.4s var(--ease-out), visibility 0.4s;
  padding: 90px var(--space-gutter) 2rem;
  overflow-y: auto;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu-inner { display: flex; flex-direction: column; gap: 1.5rem; }
.mobile-nav-menu { display: flex; flex-direction: column; gap: 0.5rem; }
.mobile-nav-menu a {
  color: var(--c-white); font-family: var(--font-display);
  font-size: 1.6rem; font-weight: 500; padding: 0.7rem 0;
  border-bottom: 1px solid var(--c-line-dark);
}
.mobile-nav-menu a:hover { color: var(--accent); }
.mobile-menu-cta { display: flex; flex-direction: column; gap: 0.7rem; margin-top: 1.5rem; }
body.nav-open { overflow: hidden; }

/* ---------- 7. Hero ---------- */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden;
  background: var(--c-midnight);
  padding-top: 100px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--c-line-dark) 1px, transparent 1px), linear-gradient(90deg, var(--c-line-dark) 1px, transparent 1px);
  background-size: 60px 60px; opacity: 0.5;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.hero-glow { position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.5; will-change: transform; }
.hero-glow-1 { width: 600px; height: 600px; background: var(--c-navy-soft); top: -200px; right: -100px; }
.hero-glow-2 { width: 500px; height: 500px; background: rgba(212, 165, 116, 0.18); bottom: -150px; left: -100px; }
.hero-noise {
  position: absolute; inset: 0; opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 1fr; gap: 4rem; align-items: center; width: 100%; }
.hero-content { max-width: 620px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: var(--fs-small); font-weight: 500;
  color: var(--text-on-dark-soft); margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(0.8); } }
.hero-title { font-size: var(--fs-hero); color: var(--c-white); line-height: 1.05; margin-bottom: 1.5rem; font-weight: 600; letter-spacing: -0.02em; }
.hero-subtitle { font-size: 1.15rem; color: var(--text-on-dark-soft); max-width: 580px; margin-bottom: 2.5rem; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.hero-actions svg { width: 18px; height: 18px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 2rem; }
.hero-badges li { display: flex; flex-direction: column; gap: 0.2rem; }
.hero-badges strong { font-family: var(--font-display); font-size: 1.6rem; color: var(--accent); line-height: 1; font-weight: 600; }
.hero-badges li::after { content: attr(data-label); }

/* Hero 视觉卡片 */
.hero-visual { position: relative; height: 520px; }
.hero-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.hero-card-main {
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 100%; max-width: 420px;
  padding: 1.5rem;
  box-shadow: var(--shadow-deep);
  transition: transform 0.3s var(--ease-out);
}
.hero-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.2rem; }
.hero-card-tag { font-size: var(--fs-tiny); font-weight: 600; color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase; }
.hero-card-dot { width: 8px; height: 8px; border-radius: 50%; background: #4ADE80; box-shadow: 0 0 8px #4ADE80; }
.hero-card-q { font-size: 0.95rem; color: var(--c-white); line-height: 1.5; margin-bottom: 1rem; }
.hero-card-options { display: flex; flex-direction: column; gap: 0.6rem; }
.hero-card-options li { display: flex; align-items: center; gap: 0.8rem; padding: 0.7rem 0.9rem; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--c-line-dark); border-radius: var(--radius-sm); font-size: var(--fs-small); color: var(--text-on-dark-soft); }
.hero-card-options li.is-correct { background: rgba(74, 222, 128, 0.1); border-color: rgba(74, 222, 128, 0.4); color: var(--c-white); }
.opt-key { width: 24px; height: 24px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); display: grid; place-items: center; font-size: 0.75rem; font-weight: 600; flex-shrink: 0; }
.is-correct .opt-key { background: #4ADE80; color: var(--c-midnight); }
.opt-text { flex: 1; }
.opt-mark { color: #4ADE80; font-weight: 600; }
.hero-card-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 1.2rem; padding-top: 1rem; border-top: 1px solid var(--c-line-dark); }
.hero-card-source { font-size: var(--fs-tiny); color: var(--text-on-dark-soft); }
.hero-card-score { font-size: var(--fs-tiny); font-weight: 600; color: var(--accent); }

.hero-card-float {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 1rem 1.2rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-mid);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.hero-card-float-1 { top: 8%; right: -20px; animation: floatY 4s ease-in-out infinite; }
.hero-card-float-2 { bottom: 10%; left: -30px; animation: floatY 4.5s ease-in-out infinite 0.5s; }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.hero-card-icon {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-deep));
  display: grid; place-items: center;
  color: var(--c-midnight); font-family: var(--font-display); font-weight: 700; font-size: 1rem;
  flex-shrink: 0;
}
.hero-card-icon-2 { background: linear-gradient(135deg, #FF6B6B, #C44569); color: var(--c-white); }
.hero-card-float-title { font-size: var(--fs-tiny); color: var(--text-on-dark-soft); margin: 0; }
.hero-card-float-score { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--c-white); line-height: 1; margin: 0; }

.hero-scroll-cue {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  z-index: 3; color: var(--text-on-dark-soft); opacity: 0.7;
  display: flex; flex-direction: column; align-items: center;
}
.mouse {
  width: 22px; height: 36px; border: 1.5px solid var(--text-on-dark-soft);
  border-radius: 12px; position: relative;
}
.wheel {
  position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 3px; height: 8px; background: var(--accent); border-radius: 2px;
  animation: wheel 1.8s ease-in-out infinite;
}
@keyframes wheel { 0% { opacity: 1; top: 6px; } 100% { opacity: 0; top: 18px; } }

/* ---------- 8. 多语种展示 ---------- */
.languages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.lang-card {
  position: relative; padding: 2.2rem 1.8rem; border-radius: var(--radius-md);
  background: var(--c-white); border: 1px solid var(--c-line-soft);
  transition: all var(--dur) var(--ease-out); overflow: hidden;
  display: flex; flex-direction: column;
}
.lang-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.lang-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-mid); border-color: var(--accent); }
.lang-card:hover::before { transform: scaleX(1); }
.lang-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; }
.lang-code {
  font-family: var(--font-display); font-size: 2.4rem; color: var(--accent);
  line-height: 1; font-weight: 600; letter-spacing: -0.02em;
}
.lang-tag { font-size: var(--fs-tiny); color: var(--text-on-light-soft); padding: 0.3rem 0.7rem; border: 1px solid var(--c-line-soft); border-radius: var(--radius-pill); }
.lang-name { font-size: 1.4rem; margin-bottom: 0.4rem; }
.lang-name-en { font-family: var(--font-body); font-size: 0.95rem; color: var(--text-on-light-soft); font-weight: 400; font-style: italic; margin-left: 0.4rem; }
.lang-desc { font-size: var(--fs-small); color: var(--text-on-light-soft); line-height: 1.7; margin-bottom: 1.2rem; }
.lang-points { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; flex: 1; }
.lang-points li { font-size: var(--fs-small); color: var(--text-on-light); padding-left: 1.4rem; position: relative; }
.lang-points li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--accent); font-weight: 700; }
.lang-link { font-size: var(--fs-small); font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 0.4rem; }
.lang-link:hover { color: var(--accent-deep); }

/* ---------- 9. AI 能力区 ---------- */
.ai-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; grid-template-rows: auto auto; gap: 1.5rem; }
.ai-card {
  position: relative; padding: 2rem;
  background: rgba(255, 255, 255, 0.03); border: 1px solid var(--c-line);
  border-radius: var(--radius-md); transition: all var(--dur) var(--ease-out);
  overflow: hidden;
}
.ai-card:hover { background: rgba(212, 165, 116, 0.06); border-color: var(--accent); transform: translateY(-4px); }
.ai-card-large { grid-row: span 2; padding: 2.5rem; }
.ai-card-glow {
  position: absolute; top: -50%; right: -30%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(212, 165, 116, 0.2), transparent 70%);
  pointer-events: none;
}
.ai-card-num { font-family: var(--font-display); font-size: 0.85rem; color: var(--accent); font-weight: 600; letter-spacing: 0.1em; margin-bottom: 1.5rem; }
.ai-card-icon { width: 56px; height: 56px; border-radius: 12px; background: linear-gradient(135deg, rgba(212, 165, 116, 0.2), rgba(212, 165, 116, 0.05)); display: grid; place-items: center; color: var(--accent); margin-bottom: 1.5rem; }
.ai-card-title { font-size: 1.2rem; margin-bottom: 0.8rem; color: var(--c-white); }
.ai-card-large .ai-card-title { font-size: 1.5rem; }
.ai-card-desc { font-size: var(--fs-small); color: var(--text-on-dark-soft); line-height: 1.7; }
.ai-card-list { display: flex; flex-direction: column; gap: 0.7rem; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--c-line-dark); }
.ai-card-list li { font-size: var(--fs-small); color: var(--text-on-dark-soft); padding-left: 1.4rem; position: relative; }
.ai-card-list li::before { content: '→'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

.ai-pipeline {
  margin-top: 4rem; padding: 2rem;
  background: rgba(255, 255, 255, 0.02); border: 1px solid var(--c-line-dark);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.8rem; flex-wrap: wrap;
}
.ai-pipeline-node { display: flex; flex-direction: column; align-items: center; gap: 0.6rem; flex: 1; min-width: 100px; }
.ai-pipeline-num {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(212, 165, 116, 0.12); color: var(--accent);
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 600; font-size: 1.1rem;
  border: 1px solid var(--c-line);
}
.ai-pipeline-node-end .ai-pipeline-num { background: var(--accent); color: var(--c-midnight); }
.ai-pipeline-label { font-size: var(--fs-small); color: var(--text-on-dark-soft); text-align: center; }
.ai-pipeline-arrow { color: var(--accent); font-size: 1.4rem; opacity: 0.6; }

/* ---------- 10. 课程体系 ---------- */
.courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.course-card {
  position: relative; background: var(--c-white); border-radius: var(--radius-md);
  border: 1px solid var(--c-line-soft); padding: 2rem;
  display: flex; flex-direction: column;
  transition: all var(--dur) var(--ease-out);
}
.course-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-mid); border-color: var(--accent); }
.course-card-featured { background: var(--c-midnight); color: var(--text-on-dark); border-color: var(--accent); transform: scale(1.02); }
.course-card-featured:hover { transform: scale(1.02) translateY(-6px); }
.course-card-featured .course-title,
.course-card-featured .course-desc { color: var(--c-white); }
.course-card-featured .course-points li { color: var(--text-on-dark-soft); }
.course-card-featured .course-points li::before { color: var(--accent); }
.course-card-badge {
  position: absolute; top: 1.2rem; right: 1.2rem;
  padding: 0.3rem 0.8rem; background: var(--accent); color: var(--c-midnight);
  font-size: var(--fs-tiny); font-weight: 700; letter-spacing: 0.08em;
  border-radius: var(--radius-pill);
}
.course-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--c-line-soft); }
.course-card-featured .course-card-top { border-bottom-color: var(--c-line-dark); }
.course-level { font-family: var(--font-display); font-size: 1rem; color: var(--accent); font-weight: 600; }
.course-stage { font-size: var(--fs-tiny); color: var(--text-on-light-soft); padding: 0.3rem 0.7rem; border: 1px solid var(--c-line-soft); border-radius: var(--radius-pill); }
.course-card-featured .course-stage { color: var(--text-on-dark-soft); border-color: var(--c-line-dark); }
.course-title { font-size: 1.5rem; margin-bottom: 0.8rem; }
.course-desc { font-size: var(--fs-small); color: var(--text-on-light-soft); line-height: 1.7; margin-bottom: 1.5rem; }
.course-points { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.8rem; flex: 1; }
.course-points li { font-size: var(--fs-small); color: var(--text-on-light); padding-left: 1.4rem; position: relative; }
.course-points li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.course-price { margin-bottom: 1.5rem; }
.price-symbol { font-size: 1rem; color: var(--accent); font-weight: 600; vertical-align: top; }
.price-num { font-family: var(--font-display); font-size: 2.4rem; color: var(--accent); font-weight: 700; line-height: 1; letter-spacing: -0.02em; }
.price-unit { font-size: var(--fs-small); color: var(--text-on-light-soft); margin-left: 0.3rem; }
.course-card-featured .price-unit { color: var(--text-on-dark-soft); }

/* ---------- 11. 学习数据 ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.stat-card {
  text-align: center; padding: 2rem 1rem;
  border-right: 1px solid var(--c-line-dark);
}
.stat-card:last-child { border-right: none; }
.stat-num { font-family: var(--font-body); font-size: clamp(2.5rem, 5vw, 3.6rem); font-weight: 800; color: var(--accent); line-height: 1; letter-spacing: -0.03em; }
.stat-label { margin-top: 1rem; font-size: var(--fs-small); color: var(--text-on-dark); letter-spacing: 0.05em; font-weight: 600; }
.stat-sub { margin-top: 0.4rem; font-size: var(--fs-tiny); color: var(--text-on-dark-soft); }

/* ---------- 12. 学员声音 ---------- */
.voices-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.voice-card {
  position: relative; padding: 2.2rem;
  background: var(--c-white); border-radius: var(--radius-md);
  border: 1px solid var(--c-line-soft);
  transition: all var(--dur) var(--ease-out);
}
.voice-card::before {
  content: '"'; position: absolute; top: 0.5rem; left: 1.5rem;
  font-family: var(--font-display); font-size: 5rem; color: var(--accent);
  opacity: 0.15; line-height: 1;
}
.voice-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-mid); border-color: var(--accent); }
.voice-quote { font-family: var(--font-display); font-size: 1.05rem; line-height: 1.7; color: var(--text-on-light); margin-bottom: 1.5rem; font-style: italic; position: relative; z-index: 1; }
.voice-author { display: flex; align-items: center; gap: 0.9rem; }
.voice-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-navy), var(--c-navy-soft));
  display: grid; place-items: center;
  color: var(--accent); font-family: var(--font-display); font-weight: 600; font-size: 1.1rem;
  flex-shrink: 0;
}
.voice-info { display: flex; flex-direction: column; }
.voice-name { font-size: var(--fs-small); font-weight: 600; color: var(--text-on-light); }
.voice-meta { font-size: var(--fs-tiny); color: var(--text-on-light-soft); }

/* ---------- 13. CTA 转化区 ---------- */
.cta-section {
  position: relative; overflow: hidden;
  background: var(--c-midnight); color: var(--text-on-dark);
  padding: 5rem 0;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(212, 165, 116, 0.15), transparent 70%);
}
.cta-inner {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  gap: 3rem; flex-wrap: wrap;
}
.cta-text { max-width: 580px; }
.cta-eyebrow { font-size: var(--fs-small); font-weight: 600; color: var(--accent); letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 1rem; }
.cta-title { font-size: var(--fs-h2); color: var(--c-white); margin-bottom: 1rem; line-height: 1.3; }
.cta-desc { color: var(--text-on-dark-soft); font-size: 1.05rem; line-height: 1.7; }
.cta-actions { display: flex; flex-direction: column; gap: 0.8rem; min-width: 220px; }

/* ---------- 14. 最新文章 ---------- */
.posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.post-card {
  background: var(--c-white); border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--c-line-soft);
  transition: all var(--dur) var(--ease-out);
  display: flex; flex-direction: column;
}
.post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-mid); border-color: var(--accent); }
.post-card-media { aspect-ratio: 16/9; overflow: hidden; background: var(--c-navy); position: relative; display: block; }
.post-card-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease-out); }
.post-card:hover .post-card-img { transform: scale(1.06); }
.post-card-placeholder { width: 100%; height: 100%; display: grid; place-items: center; background: linear-gradient(135deg, var(--c-navy), var(--c-midnight)); }
.post-card-placeholder-letter { font-family: var(--font-display); font-size: 3rem; color: var(--accent); font-style: italic; }
.post-card-cat {
  position: absolute; top: 1rem; left: 1rem; z-index: 2;
  padding: 0.3rem 0.8rem; background: rgba(10, 22, 40, 0.85); backdrop-filter: blur(8px);
  color: var(--accent); font-size: var(--fs-tiny); font-weight: 600; letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
}
.post-card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.post-card-meta { display: flex; align-items: center; gap: 0.5rem; font-size: var(--fs-tiny); color: var(--text-on-light-soft); margin-bottom: 0.8rem; }
.post-card-dot { opacity: 0.5; }
.post-card-title { font-size: 1.15rem; line-height: 1.4; margin-bottom: 0.8rem; }
.post-card-title a { color: var(--text-on-light); }
.post-card-title a:hover { color: var(--accent); }
.post-card-excerpt { font-size: var(--fs-small); color: var(--text-on-light-soft); margin-bottom: 1rem; flex: 1; line-height: 1.6; }
.post-card-link { font-size: var(--fs-small); font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 0.4rem; }

.posts-empty { text-align: center; padding: 3rem 0; color: var(--text-on-light-soft); }
.posts-empty p { margin-bottom: 1.5rem; }

/* ---------- 15. 页脚 ---------- */
.site-footer { background: var(--c-midnight); color: var(--text-on-dark-soft); padding: 4rem 0 0; border-top: 1px solid var(--c-line-dark); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 1rem; }
.footer-brand .brand-name { color: var(--c-white); font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; }
.footer-slogan { color: var(--accent); font-size: var(--fs-small); margin-bottom: 1rem; letter-spacing: 0.02em; }
.footer-desc { font-size: var(--fs-small); line-height: 1.7; max-width: 320px; color: var(--text-on-dark-soft); }
.footer-col h3.footer-title, .footer-title {
  font-family: var(--font-body); font-size: var(--fs-small); font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-white);
  margin-bottom: 1.2rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-links a { color: var(--text-on-dark-soft); font-size: var(--fs-small); }
.footer-links a:hover { color: var(--accent); }
.footer-contact li { font-size: var(--fs-small); color: var(--text-on-dark-soft); margin-bottom: 0.5rem; }
.footer-contact strong { color: var(--c-white); }
.footer-social { display: flex; gap: 0.8rem; margin-top: 1.2rem; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 9px;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--c-line-dark);
  display: grid; place-items: center; color: var(--text-on-dark-soft);
  transition: all var(--dur) var(--ease-soft);
}
.footer-social a:hover { background: var(--accent); color: var(--c-midnight); border-color: var(--accent); transform: translateY(-2px); }
.footer-bottom { border-top: 1px solid var(--c-line-dark); padding: 1.5rem 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.8rem; }
.footer-copyright { font-size: var(--fs-tiny); color: var(--text-on-dark-soft); }
.footer-icp a { font-size: var(--fs-tiny); color: var(--text-on-dark-soft); }
.footer-icp a:hover { color: var(--accent); }

/* ---------- 16. 博客列表 / 归档页 ---------- */
.page-header { padding: calc(var(--space-section) + 60px) 0 var(--space-section); background: var(--c-midnight); color: var(--c-white); }
.archive-header { text-align: center; }
.page-eyebrow { font-size: var(--fs-small); font-weight: 600; color: var(--accent); letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 1rem; }
.page-title { font-size: var(--fs-h1); color: var(--c-white); margin-bottom: 1rem; }
.page-title span { color: var(--accent); }
.archive-desc { color: var(--text-on-dark-soft); max-width: 640px; margin: 0 auto; }

.archive-main { padding: var(--space-section) 0; }
.posts-list { display: flex; flex-direction: column; gap: 2rem; max-width: 920px; margin: 0 auto; }
.post-row {
  display: grid; grid-template-columns: 240px 1fr; gap: 1.8rem;
  padding: 1.5rem; background: var(--c-white); border-radius: var(--radius-md);
  border: 1px solid var(--c-line-soft);
  transition: all var(--dur) var(--ease-out);
}
.post-row:hover { transform: translateX(4px); box-shadow: var(--shadow-mid); border-color: var(--accent); }
.post-row-media { aspect-ratio: 16/10; overflow: hidden; border-radius: var(--radius-sm); background: var(--c-navy); display: block; }
.post-row-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease-out); }
.post-row:hover .post-row-img { transform: scale(1.05); }
.post-row-placeholder { width: 100%; height: 100%; display: grid; place-items: center; background: linear-gradient(135deg, var(--c-navy), var(--c-midnight)); }
.post-row-placeholder span { font-family: var(--font-display); font-size: 2.5rem; color: var(--accent); font-style: italic; }
.post-row-body { display: flex; flex-direction: column; }
.post-row-meta { display: flex; align-items: center; gap: 0.6rem; font-size: var(--fs-tiny); color: var(--text-on-light-soft); margin-bottom: 0.8rem; }
.post-row-cat { color: var(--accent); font-weight: 600; }
.post-row-dot { opacity: 0.5; }
.post-row-title { font-size: 1.3rem; line-height: 1.4; margin-bottom: 0.8rem; }
.post-row-title a { color: var(--text-on-light); }
.post-row-title a:hover { color: var(--accent); }
.post-row-excerpt { font-size: var(--fs-small); color: var(--text-on-light-soft); line-height: 1.6; margin-bottom: 1rem; flex: 1; }
.post-row-link { font-size: var(--fs-small); font-weight: 600; color: var(--accent); }

.pagination { display: flex; gap: 0.5rem; justify-content: center; margin-top: 3rem; flex-wrap: wrap; }
.pagination ul { display: flex; gap: 0.4rem; list-style: none; }
.pagination .page-numbers {
  width: 40px; height: 40px; display: grid; place-items: center;
  border: 1px solid var(--c-line-soft); border-radius: var(--radius-sm);
  font-size: var(--fs-small); color: var(--text-on-light);
  transition: all var(--dur) var(--ease-soft);
}
.pagination .page-numbers.current, .pagination .page-numbers:hover { background: var(--accent); color: var(--c-midnight); border-color: var(--accent); }

/* ---------- 17. 文章详情 ---------- */
.single-article { padding-top: 100px; }
.single-header { background: var(--c-midnight); color: var(--c-white); padding: 3rem 0 2.5rem; }
.single-header-inner { max-width: var(--container-narrow); margin: 0 auto; }
.single-cats { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.2rem; }
.single-cat { font-size: var(--fs-tiny); font-weight: 600; color: var(--accent); padding: 0.3rem 0.8rem; border: 1px solid var(--c-line); border-radius: var(--radius-pill); letter-spacing: 0.05em; }
.single-title { font-size: var(--fs-h1); color: var(--c-white); line-height: 1.25; margin-bottom: 1.2rem; }
.single-meta { display: flex; align-items: center; gap: 0.7rem; font-size: var(--fs-small); color: var(--text-on-dark-soft); flex-wrap: wrap; }
.single-author { display: flex; align-items: center; gap: 0.5rem; }
.single-avatar { border-radius: 50%; }
.single-dot { opacity: 0.5; }

.single-cover-wrap { max-width: var(--container-max); margin: 0 auto; }
.single-cover { width: 100%; height: auto; display: block; border-radius: var(--radius-md); }

.single-body-wrap { padding: 3rem 0; }
.single-body { max-width: var(--container-narrow); margin: 0 auto; font-size: 1.05rem; line-height: 1.85; color: var(--text-on-light); }
.single-body h2, .single-body h3, .single-body h4 { margin: 2rem 0 1rem; color: var(--text-on-light); }
.single-body p { margin-bottom: 1.2rem; }
.single-body ul, .single-body ol { margin: 0 0 1.2rem 1.5rem; }
.single-body ul { list-style: disc; }
.single-body ol { list-style: decimal; }
.single-body li { margin-bottom: 0.5rem; }
.single-body img { border-radius: var(--radius-md); margin: 1.5rem 0; }
.single-body blockquote {
  border-left: 3px solid var(--accent); padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 1.5rem 0; font-style: italic; color: var(--text-on-light-soft);
  font-family: var(--font-display); font-size: 1.1rem;
}
.single-body pre { background: var(--c-midnight); color: var(--c-white); padding: 1.5rem; border-radius: var(--radius-md); overflow-x: auto; margin: 1.5rem 0; font-family: var(--font-mono); font-size: 0.9em; }
.single-body code { font-family: var(--font-mono); font-size: 0.9em; background: rgba(212, 165, 116, 0.1); padding: 0.1rem 0.4rem; border-radius: 4px; }
.single-body pre code { background: transparent; padding: 0; }
.single-body a { text-decoration: underline; text-underline-offset: 3px; }
.page-links { margin: 2rem 0; }
.page-links a, .page-links .page-link-num {
  display: inline-grid; place-items: center; width: 36px; height: 36px;
  border: 1px solid var(--c-line-soft); border-radius: var(--radius-sm); margin-right: 0.3rem;
  font-size: var(--fs-small);
}
.single-tags { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--c-line-soft); }
.single-tag { font-size: var(--fs-small); color: var(--accent); padding: 0.3rem 0.8rem; background: rgba(212, 165, 116, 0.08); border-radius: var(--radius-pill); }
.single-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--c-line-soft);
  max-width: var(--container-narrow); margin-left: auto; margin-right: auto;
}
.single-nav-prev a, .single-nav-next a { display: inline-block; font-size: var(--fs-small); color: var(--text-on-light-soft); }
.single-nav-prev a:hover, .single-nav-next a:hover { color: var(--accent); }
.single-nav-next { text-align: right; }

/* ---------- 18. 通用页 ---------- */
.page-article { padding-top: 100px; }
.page-article .page-header { background: var(--c-midnight); text-align: center; }
.page-lead { color: var(--text-on-dark-soft); max-width: 640px; margin: 1rem auto 0; font-size: 1.05rem; }
.page-cover-wrap { max-width: var(--container-max); margin: 0 auto; }
.page-cover { width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
.page-body-wrap { padding: 3rem 0; }
.page-body { max-width: var(--container-narrow); margin: 0 auto; font-size: 1.05rem; line-height: 1.85; color: var(--text-on-light); }
.page-body h2, .page-body h3 { margin: 2rem 0 1rem; color: var(--text-on-light); }
.page-body p { margin-bottom: 1.2rem; }
.page-body img { border-radius: var(--radius-md); margin: 1.5rem 0; }

/* ---------- 19. 关于页 ---------- */
.about-hero { padding: calc(var(--space-section) + 100px) 0 var(--space-section); background: var(--c-midnight); color: var(--c-white); }
.about-hero-inner { max-width: 800px; margin: 0 auto; text-align: center; }
.about-title { font-size: var(--fs-h1); color: var(--c-white); margin: 1rem 0 1.5rem; }
.about-lead { color: var(--text-on-dark-soft); font-size: 1.1rem; line-height: 1.7; }
.about-body-section { background: var(--bg-light-warm); }
.about-body { max-width: var(--container-narrow); margin: 0 auto; font-size: 1.05rem; line-height: 1.85; color: var(--text-on-light); }
.about-body h2, .about-body h3 { margin: 2rem 0 1rem; }
.about-body p { margin-bottom: 1.2rem; }
.about-values { background: var(--bg-light); }
.about-values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.value-card { padding: 2rem; background: var(--c-white); border-radius: var(--radius-md); border: 1px solid var(--c-line-soft); }
.value-num { font-family: var(--font-display); font-size: 2rem; color: var(--accent); font-weight: 600; display: block; margin-bottom: 1rem; }
.value-title { font-size: 1.2rem; margin-bottom: 0.8rem; }
.value-desc { font-size: var(--fs-small); color: var(--text-on-light-soft); line-height: 1.7; }
.about-timeline { background: var(--bg-light-warm); }
.timeline { max-width: 800px; margin: 0 auto; position: relative; }
.timeline::before { content: ''; position: absolute; left: 20px; top: 0; bottom: 0; width: 2px; background: var(--c-line); }
.timeline-item { position: relative; padding-left: 60px; margin-bottom: 2.5rem; }
.timeline-item::before { content: ''; position: absolute; left: 13px; top: 4px; width: 16px; height: 16px; border-radius: 50%; background: var(--accent); border: 3px solid var(--bg-light-warm); }
.timeline-year { font-family: var(--font-display); font-size: 1.3rem; color: var(--accent); font-weight: 600; }
.timeline-title { font-size: 1.1rem; font-weight: 600; margin: 0.3rem 0; }
.timeline-desc { font-size: var(--fs-small); color: var(--text-on-light-soft); }

/* ---------- 20. 联系页 ---------- */
.contact-hero { padding: calc(var(--space-section) + 100px) 0 var(--space-section); background: var(--c-midnight); color: var(--c-white); }
.contact-hero-inner { max-width: 800px; margin: 0 auto; text-align: center; }
.contact-title { font-size: var(--fs-h1); color: var(--c-white); margin: 1rem 0 1.5rem; }
.contact-lead { color: var(--text-on-dark-soft); font-size: 1.1rem; line-height: 1.7; }
.contact-section { background: var(--bg-light-warm); }
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 3rem; align-items: flex-start; }
.contact-col-title { font-size: 1.4rem; color: var(--text-on-light); margin-bottom: 1.5rem; }
.contact-col-title-sm { font-size: 1.1rem; margin-top: 2.5rem; }
.contact-info-list { display: flex; flex-direction: column; gap: 1.5rem; margin-bottom: 1rem; }
.contact-info-item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-info-icon { width: 44px; height: 44px; border-radius: 10px; background: rgba(212, 165, 116, 0.12); color: var(--accent); display: grid; place-items: center; flex-shrink: 0; }
.contact-info-label { font-size: var(--fs-tiny); color: var(--text-on-light-soft); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.2rem; }
.contact-info-value { font-size: 1rem; font-weight: 500; color: var(--text-on-light); }
.contact-info-value a { color: var(--text-on-light); }
.contact-info-value a:hover { color: var(--accent); }
.contact-quick-cta { margin-top: 2rem; padding: 1.8rem; background: var(--c-white); border-radius: var(--radius-md); border: 1px solid var(--c-line-soft); }
.contact-quick-desc { font-size: var(--fs-small); color: var(--text-on-light-soft); margin-bottom: 1rem; }
.contact-form-col { background: var(--c-white); padding: 2.2rem; border-radius: var(--radius-md); border: 1px solid var(--c-line-soft); }
.contact-form-desc { font-size: var(--fs-small); color: var(--text-on-light-soft); margin-bottom: 1.8rem; }
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; }
.form-row { display: flex; flex-direction: column; }
.form-label { font-size: var(--fs-small); font-weight: 600; color: var(--text-on-light); margin-bottom: 0.5rem; }
.form-input {
  width: 100%; padding: 0.85rem 1rem;
  border: 1px solid var(--c-line-soft); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: var(--fs-body);
  background: var(--c-cream-warm); color: var(--text-on-light);
  transition: all var(--dur) var(--ease-soft);
}
.form-input:focus { outline: none; border-color: var(--accent); background: var(--c-white); box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.12); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-select { cursor: pointer; appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238B9BB4' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; padding-right: 2.5rem; }
.form-row-inline { flex-direction: row; align-items: center; }
.form-checkbox { display: flex; align-items: center; gap: 0.6rem; font-size: var(--fs-small); color: var(--text-on-light-soft); cursor: pointer; }
.form-checkbox input { width: 16px; height: 16px; accent-color: var(--accent); }
.form-feedback { font-size: var(--fs-small); padding: 0; min-height: 1rem; }
.form-feedback.is-success { color: #16a34a; padding: 0.7rem 1rem; background: rgba(22, 163, 74, 0.08); border-radius: var(--radius-sm); }
.form-feedback.is-error { color: #dc2626; padding: 0.7rem 1rem; background: rgba(220, 38, 38, 0.08); border-radius: var(--radius-sm); }

/* ---------- 21. 404 / 搜索 ---------- */
.error-404-section { min-height: 80vh; display: flex; align-items: center; padding-top: 100px; background: var(--c-midnight); color: var(--c-white); }
.error-404-inner { max-width: 640px; margin: 0 auto; text-align: center; padding: 3rem 0; }
.error-404-code { font-family: var(--font-display); font-size: clamp(5rem, 15vw, 9rem); color: var(--accent); line-height: 1; font-weight: 700; letter-spacing: -0.04em; }
.error-404-title { font-size: var(--fs-h2); color: var(--c-white); margin: 1.5rem 0 1rem; }
.error-404-desc { color: var(--text-on-dark-soft); margin-bottom: 2rem; font-size: 1.05rem; line-height: 1.7; }
.error-404-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2.5rem; }
.error-404-search { max-width: 480px; margin: 0 auto; }

.search-form { width: 100%; }
.search-form-inner {
  display: flex; align-items: stretch; gap: 0;
  border: 1px solid var(--c-line-soft); border-radius: var(--radius-sm);
  background: var(--c-white); overflow: hidden;
  transition: all var(--dur) var(--ease-soft);
}
.search-form-inner:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.12); }
.search-form-icon { display: grid; place-items: center; padding: 0 0.8rem; color: var(--text-on-light-soft); flex-shrink: 0; }
.search-form-input { flex: 1; border: none; background: transparent; padding: 0.85rem 0; font-size: var(--fs-body); color: var(--text-on-light); }
.search-form-input:focus { outline: none; }
.search-form-submit { padding: 0 1.5rem; background: var(--accent); color: var(--c-midnight); font-weight: 600; font-size: var(--fs-small); transition: background var(--dur) var(--ease-soft); }
.search-form-submit:hover { background: var(--accent-light); }
.error-404-search .search-form-inner { background: rgba(255, 255, 255, 0.05); border-color: var(--c-line-dark); }
.error-404-search .search-form-input { color: var(--c-white); }
.error-404-search .search-form-input::placeholder { color: var(--text-on-dark-soft); }

/* ---------- 22. 移动端固定 CTA 栏 ---------- */
.mobile-cta-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: rgba(10, 22, 40, 0.96); backdrop-filter: blur(12px);
  border-top: 1px solid var(--c-line);
  padding: 0.6rem 1rem;
  display: none; gap: 0.6rem;
  transform: translateY(100%); transition: transform var(--dur) var(--ease-out);
}
.mobile-cta-bar.is-visible { transform: translateY(0); }
.mcta {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 0.2rem;
  padding: 0.55rem 0.5rem; border-radius: var(--radius-sm);
  font-size: var(--fs-tiny); color: var(--text-on-dark-soft);
  transition: all var(--dur) var(--ease-soft);
}
.mcta svg { width: 20px; height: 20px; }
.mcta-trial { background: var(--accent); color: var(--c-midnight); font-weight: 600; }
.mcta-trial:hover { background: var(--accent-light); color: var(--c-midnight); }
.mcta-phone:hover { color: var(--accent); }

/* ---------- 23. 滚动动画 ---------- */
.reveal, .reveal-up {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.is-visible, .reveal-up.is-visible { opacity: 1; transform: translateY(0); }
.reveal-up { transform: translateY(50px); }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-up { opacity: 1; transform: none; transition: none; }
  .hero-glow, .hero-card-float, .mouse .wheel, .hero-eyebrow .dot { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 24. WordPress 原生对齐 / 评论 / 工具类 ---------- */
.alignleft { float: left; margin: 0 1.5rem 1rem 0; }
.alignright { float: right; margin: 0 0 1rem 1.5rem; }
.aligncenter { display: block; margin: 1.5rem auto; }
.alignwide { max-width: 100%; }
.alignfull { max-width: 100vw; margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); }
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: var(--fs-tiny); color: var(--text-on-light-soft); text-align: center; margin-top: 0.5rem; }
.screen-reader-text { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; word-wrap: normal !important; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 999; background: var(--accent); color: var(--c-midnight); padding: 0.6rem 1rem; border-radius: 0 0 var(--radius-sm) 0; }
.skip-link:focus { left: 0; }

.sticky { display: block; }
.bypostauthor { display: block; }

/* 评论区 */
.comments-area { max-width: var(--container-narrow); margin: 3rem auto 0; padding-top: 2rem; border-top: 1px solid var(--c-line-soft); }
.comments-title { font-size: 1.4rem; margin-bottom: 1.5rem; }
.comment-list { display: flex; flex-direction: column; gap: 1.5rem; }
.comment-body { padding: 1.2rem; background: var(--c-white); border: 1px solid var(--c-line-soft); border-radius: var(--radius-sm); }
.comment-meta { display: flex; align-items: center; gap: 0.6rem; font-size: var(--fs-small); color: var(--text-on-light-soft); margin-bottom: 0.8rem; }
.comment-author { font-weight: 600; color: var(--text-on-light); }
.comment-content { font-size: var(--fs-small); line-height: 1.7; }
.comment-reply-link { color: var(--accent); font-size: var(--fs-small); }
.comment-respond { margin-top: 2rem; }
.comment-form { display: flex; flex-direction: column; gap: 1rem; }
.comment-form p { margin-bottom: 0; }
.comment-form label { font-size: var(--fs-small); font-weight: 600; display: block; margin-bottom: 0.4rem; }
.comment-form input, .comment-form textarea { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--c-line-soft); border-radius: var(--radius-sm); font-family: var(--font-body); }
.comment-form input:focus, .comment-form textarea:focus { outline: none; border-color: var(--accent); }
.comment-form .submit { background: var(--accent); color: var(--c-midnight); border: none; padding: 0.85rem 1.5rem; font-weight: 600; border-radius: var(--radius-sm); cursor: pointer; width: auto; }
.comment-form .submit:hover { background: var(--accent-light); }

/* ---------- 25. 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-actions .nav-cta-phone,
  .nav-actions .nav-cta-trial { display: none; }
  .nav-actions .nav-toggle { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
  .hero-visual { height: 380px; max-width: 420px; margin: 0 auto; }
  .hero-content { max-width: 100%; text-align: center; margin: 0 auto; }
  .hero-eyebrow, .hero-actions, .hero-badges { justify-content: center; }
  .languages-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr 1fr; }
  .ai-card-large { grid-row: span 1; grid-column: span 2; }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .course-card-featured { transform: none; }
  .course-card-featured:hover { transform: translateY(-6px); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem 0; }
  .stat-card:nth-child(2) { border-right: none; }
  .voices-grid { grid-template-columns: 1fr; max-width: 640px; margin: 0 auto; }
  .posts-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .about-values-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .contact-layout { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-actions { width: 100%; max-width: 320px; margin: 0 auto; }
  .ai-pipeline { flex-wrap: wrap; gap: 1.5rem; justify-content: center; }
  .ai-pipeline-arrow { display: none; }
}

@media (max-width: 640px) {
  .section { padding: 3.5rem 0; }
  .hero { min-height: auto; padding: 100px 0 4rem; }
  .hero-visual { height: auto; max-width: 100%; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; padding: 0.5rem 0; }
  .hero-card-main { position: relative; top: auto; left: auto; transform: none; width: 100%; max-width: 380px; margin: 0; }
  .hero-card-float-1, .hero-card-float-2 { position: relative; top: auto; right: auto; left: auto; bottom: auto; animation: none; width: 100%; max-width: 340px; }
  .hero-badges { gap: 1.2rem; }
  .hero-badges strong { font-size: 1.3rem; }
  .section-head-row { flex-direction: column; align-items: flex-start; gap: 1.2rem; }
  .languages-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .ai-card-large { grid-column: span 1; }
  .courses-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem 0.5rem; }
  .stat-card { padding: 1.5rem 0.5rem; }
  .stat-card:nth-child(2) { border-right: none; }
  .posts-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom-inner { flex-direction: column; text-align: center; gap: 0.5rem; }
  .cta-actions { flex-direction: column; }
  .post-row { grid-template-columns: 1fr; gap: 1rem; }
  .post-row-media { aspect-ratio: 16/9; }
  .single-nav { grid-template-columns: 1fr; gap: 0.8rem; }
  .single-nav-next { text-align: left; }
  .single-body, .page-body { font-size: 1rem; }
  .mobile-cta-bar { display: flex; }
  body { padding-bottom: 76px; }
  .about-hero, .contact-hero { padding-top: calc(var(--space-section) + 80px); }
  .error-404-actions { flex-direction: column; align-items: stretch; }
  .timeline-item { padding-left: 50px; }
  .timeline::before { left: 16px; }
  .timeline-item::before { left: 9px; }
  .btn-lg { padding: 0.95rem 1.6rem; font-size: 0.95rem; }
}