/* ═══════════════════════════════════════════
   WOA 项目详情页统一设计系统 — Detail Pages
   与主页面 main.css 完全对齐：配色 / 字体 / 间距 / 组件
   ═══════════════════════════════════════════ */

:root {
  /* ── Navy ── */
  --navy-950: #091422; --navy-900: #0E1F33; --navy-800: #142D4A; --navy-700: #1E3A5F;
  --navy-600: #2A5090; --navy-500: #3A6BB5; --navy-400: #5B88C9; --navy-300: #8DAEDB;
  --navy-200: #C0D3EB; --navy-100: #DEE8F5; --navy-050: #EFF4FA;

  /* ── Gold ── */
  --gold-800: #9E6A0E; --gold-700: #C58413; --gold-600: #E09518; --gold-500: #F5A623;
  --gold-400: #F8B94D; --gold-300: #FACC78; --gold-200: #FCE0A8; --gold-100: #FDF0D4; --gold-050: #FEF8EA;

  /* ── Paper ── */
  --paper-000: #FFFFFF; --paper-050: #FAF8F5; --paper-100: #F6F3EC; --paper-200: #EFEAE0;
  --paper-300: #E4DED0; --paper-400: #D4CEC0;

  /* ── Ink ── */
  --ink-primary: #1A1A1A; --ink-secondary: #5C5853; --ink-muted: #9C9892;
  --ink-inverse: #FAF8F5;

  /* ── Semantic ── */
  --bg: var(--paper-000); --bg-alt: var(--paper-050); --bg-warm: var(--paper-100);
  --text-strong: var(--ink-primary); --text-body: var(--ink-secondary);
  --border-hairline: rgba(0,0,0,0.06); --border-light: rgba(0,0,0,0.08);
  --border: rgba(0,0,0,0.12); --border-strong: rgba(0,0,0,0.18);

  /* ── Shadows ── */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04); --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.07); --shadow-lg: 0 16px 56px rgba(0,0,0,0.09);
  --shadow-xl: 0 32px 80px rgba(0,0,0,0.12);

  /* ── Layout ── */
  --r-xs: 4px; --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 24px; --r-full: 9999px;
  --container: 1280px;
  --pad-x: clamp(24px, 5vw, 64px);
  --section-y: clamp(56px, 7vw, 100px);
  --section-gap: clamp(28px, 4vw, 44px);

  /* ── Motion ── */
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out: cubic-bezier(0.76, 0, 0.24, 1);
  --dur-fast: 0.2s; --dur: 0.35s; --dur-slow: 0.55s; --dur-glacial: 0.8s;

  color-scheme: light;
}


/* ═══════════════════════════════════════════
   THEME — 深色模式
   ═══════════════════════════════════════════ */
:root[data-theme="dark"] {
  color-scheme: dark;

  --paper-000: #0B1524; --paper-050: #101E31; --paper-100: #14263C;
  --paper-200: #1A2F49; --paper-300: #243A57; --paper-400: #2F4766;

  --ink-primary: #E8EEF6; --ink-secondary: #B9C3D0; --ink-muted: #8290A3;
  --ink-inverse: #F5F1E8;

  --border-hairline: rgba(255,255,255,0.07); --border-light: rgba(255,255,255,0.10);
  --border: rgba(255,255,255,0.16); --border-strong: rgba(255,255,255,0.26);

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.30); --shadow-sm: 0 2px 8px rgba(0,0,0,0.35);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.40); --shadow-lg: 0 16px 56px rgba(0,0,0,0.45);
  --shadow-xl: 0 32px 80px rgba(0,0,0,0.50);
}

/* 深色下硬编码浅色背景的覆盖（back-link / lang-switcher / mentor 悬停） */
:root[data-theme="dark"] .back-link{background:rgba(11,21,36,0.92)}
:root[data-theme="dark"] .lang-switcher{background:rgba(11,21,36,0.92)}
:root[data-theme="dark"] .mentor-card:hover{background:var(--paper-050)}
:root[data-theme="dark"] .testimonial-card:hover{background:var(--paper-050)}
:root[data-theme="dark"] .topic-item:hover{background:var(--paper-050)}

/* ── 主题切换控件（详情页，圆形胶囊风格）── */
.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-full);
  border:1px solid var(--border-hairline);background:rgba(255,255,255,0.92);
  color:var(--ink-secondary);cursor:pointer;transition:all var(--dur-fast);flex-shrink:0;
  box-shadow:var(--shadow-sm);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
:root[data-theme="dark"] .theme-toggle{background:rgba(11,21,36,0.92)}
.theme-toggle:hover{color:var(--gold-600);border-color:var(--gold-400)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle svg{display:none}
.theme-toggle[data-mode="auto"] .icon-auto{display:block}
.theme-toggle[data-mode="light"] .icon-sun{display:block}
.theme-toggle[data-mode="dark"] .icon-moon{display:block}

/* ── 平滑过渡 ── */
html.theme-switching,
html.theme-switching *,
html.theme-switching *::before,
html.theme-switching *::after{
  transition:background-color var(--dur) var(--ease-in-out),
             color var(--dur) var(--ease-in-out),
             border-color var(--dur) var(--ease-in-out),
             box-shadow var(--dur) var(--ease-in-out) !important;
}

/* ═══════════════ RESET ═══════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-rendering:optimizeLegibility}
body{font-family:'Inter','Noto Sans SC',sans-serif;font-size:16px;font-weight:400;line-height:1.7;color:var(--ink-secondary);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;max-width:100vw}
ul,ol{list-style:none}img,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
::selection{background:var(--gold-200);color:var(--navy-900)}

/* ═══════════════ LAYOUT ═══════════════ */
.container{max-width:var(--container);margin:0 auto;padding-left:var(--pad-x);padding-right:var(--pad-x);width:100%;overflow-x:hidden;overflow-x:clip}
.section{padding-top:var(--section-y);padding-bottom:var(--section-y);overflow-x:hidden;overflow-x:clip}
.section--alt{background:var(--bg-alt)}
.section--warm{background:var(--bg-warm)}

/* ═══════════════ 顶部操作栏 ═══════════════ */
.back-link{
  position:fixed;top:22px;left:var(--pad-x);z-index:200;
  display:inline-flex;align-items:center;gap:8px;
  font-family:'Inter','Noto Sans SC',sans-serif;
  font-size:13px;font-weight:500;color:var(--ink-secondary);
  padding:0 18px;height:42px;background:rgba(255,255,255,0.92);
  border:1px solid var(--border-hairline);border-radius:var(--r-full);
  box-shadow:var(--shadow-sm);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:all var(--dur-fast);
}
.back-link:hover{color:var(--navy-800);border-color:var(--navy-300);transform:translateX(-2px)}
.back-link svg{width:16px;height:16px}

.top-actions{
  position:fixed;top:22px;right:var(--pad-x);z-index:200;
  display:flex;align-items:center;gap:10px;
}
.apply-btn{
  display:inline-flex;align-items:center;gap:6px;
  font-family:'Inter','Noto Sans SC',sans-serif;
  font-size:13px;font-weight:600;letter-spacing:0.02em;
  padding:0 22px;height:42px;background:var(--gold-600);color:#fff;
  border-radius:var(--r-full);box-shadow:var(--shadow-sm);
  transition:all var(--dur-fast);
}
.apply-btn:hover{background:var(--gold-500);transform:translateY(-1px)}
.apply-btn svg{width:15px;height:15px}

.lang-switcher{
  display:inline-flex;align-items:center;gap:0;
  height:42px;padding:3px;background:rgba(255,255,255,0.92);
  border:1px solid var(--border-hairline);border-radius:var(--r-full);
  box-shadow:var(--shadow-sm);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.lang-switcher button{
  border:0;background:transparent;height:100%;
  padding:0 16px;font-family:'Inter','Noto Sans SC',sans-serif;
  font-size:12.5px;font-weight:600;letter-spacing:0.02em;
  cursor:pointer;color:var(--ink-muted);border-radius:var(--r-full);
  transition:all var(--dur-fast);
}
.lang-switcher button.active{background:var(--navy-800);color:#fff}
.lang-switcher button:hover:not(.active){color:var(--navy-800)}

/* ═══════════════ HERO ═══════════════ */
.hero{
  position:relative;overflow:hidden;color:#fff;text-align:center;
  background:linear-gradient(135deg,var(--navy-950) 0%,var(--navy-900) 35%,var(--navy-800) 70%,var(--navy-700) 100%);
  padding:clamp(140px,16vw,200px) 0 clamp(76px,9vw,112px);
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse at 72% 18%,rgba(245,166,35,0.14) 0%,transparent 55%),
             radial-gradient(ellipse at 22% 82%,rgba(245,166,35,0.08) 0%,transparent 50%);
}
.hero .container{position:relative;z-index:1}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  font-family:'Inter','Noto Sans SC',sans-serif;
  font-size:11px;font-weight:500;letter-spacing:0.18em;text-transform:uppercase;
  color:var(--gold-400);margin-bottom:26px;
}
.hero-badge::before,.hero-badge::after{content:'';width:22px;height:1px;background:var(--gold-500);opacity:0.7}
.hero-title{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:clamp(36px,5.5vw,72px);font-weight:700;
  line-height:1.1;margin-bottom:26px;letter-spacing:-0.02em;
  text-wrap:balance;
}
.hero-subtitle{
  font-size:clamp(15px,1.4vw,19px);color:rgba(255,255,255,0.78);
  line-height:1.7;max-width:min(620px,100%);margin:0 auto;
}
.hero-download-btn{margin-top:32px;box-shadow:0 8px 24px rgba(245,166,35,0.28)}

/* ═══════════════ META STRIP ═══════════════ */
.meta-strip{
  background:var(--bg-alt);border-bottom:1px solid var(--border-hairline);
  padding:clamp(32px,4vw,48px) 0;
}
.meta-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,3vw,32px);text-align:center}
.meta-item{position:relative;padding:0 8px}
.meta-item + .meta-item::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:44px;background:var(--border-hairline);
}
.meta-value{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:clamp(22px,2.8vw,34px);font-weight:700;color:var(--navy-800);line-height:1.15;
}
.meta-label{
  font-size:10.5px;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--ink-muted);font-weight:500;margin-top:8px;
}

/* ═══════════════ SECTION HEAD ═══════════════ */
.section-head{text-align:center;max-width:720px;margin:0 auto var(--section-gap)}
.section-kicker{
  display:inline-flex;align-items:center;gap:14px;
  font-family:'Inter','Noto Sans SC',sans-serif;
  font-size:10px;font-weight:500;letter-spacing:0.2em;text-transform:uppercase;
  color:var(--gold-700);margin-bottom:20px;
}
.section-kicker::before,.section-kicker::after{content:'';display:block;width:28px;height:1px;background:var(--gold-400)}
.section-title{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:clamp(28px,4vw,48px);font-weight:700;line-height:1.12;
  color:var(--navy-900);margin-bottom:16px;letter-spacing:-0.015em;
  text-wrap:balance;
}
.section-subtitle{font-size:16px;color:var(--ink-secondary);line-height:1.65;max-width:min(560px,100%);margin:0 auto}

/* ═══════════════ 卡片网格 ═══════════════ */
.card-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:clamp(20px,2.5vw,28px);max-width:1100px;margin:0 auto;
}
.card{
  background:var(--bg);border:1px solid var(--border-hairline);
  border-radius:var(--r-lg);padding:36px 32px;
  transition:border-color var(--dur),box-shadow var(--dur),transform var(--dur);
}
.card:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.card-icon{
  width:52px;height:52px;margin-bottom:20px;border-radius:50%;
  background:var(--gold-050);display:flex;align-items:center;justify-content:center;color:var(--gold-600);
}
.card-icon svg{width:22px;height:22px}
.card-num{
  font-family:'Libre Baskerville',Georgia,serif;
  font-size:15px;font-weight:500;color:var(--gold-600);margin-bottom:14px;
}
.card-title{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:22px;font-weight:700;color:var(--navy-800);margin-bottom:10px;line-height:1.25;
}
.card-desc{font-size:14.5px;color:var(--ink-secondary);line-height:1.65}

/* ═══════════════ 正文块 / 引言 ═══════════════ */
.prose{max-width:min(760px,100%);margin:0 auto;text-align:center}
.prose p{font-size:16.5px;color:var(--ink-secondary);line-height:1.8}
.prose p + p{margin-top:18px}
.prose-title{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:clamp(22px,2.8vw,30px);font-weight:700;color:var(--navy-800);
  line-height:1.3;margin-bottom:18px;
}

/* ═══════════════ 评价 ═══════════════ */
.testimonials-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(20px,2.5vw,28px);max-width:1100px;margin:0 auto}
.testimonial-card{
  background:var(--bg);border:1px solid var(--border-hairline);
  border-radius:var(--r-lg);padding:36px 32px;
  display:flex;flex-direction:column;gap:20px;
  transition:border-color var(--dur),box-shadow var(--dur),transform var(--dur);
}
.testimonial-card:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.t-quote{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:16px;font-style:italic;line-height:1.6;color:var(--ink-primary);
  position:relative;padding-top:8px;
}
.t-quote::before{content:'\201C';font-size:44px;line-height:0;color:var(--gold-400);display:block;margin-bottom:14px}
.t-name{font-size:14px;font-weight:600;color:var(--ink-primary)}
.t-role{font-size:13px;color:var(--ink-muted);font-style:italic;margin-top:2px}

/* ═══════════════ 主题列表（LPE）═══ */
.topic-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.topic-item{
  display:flex;gap:20px;align-items:flex-start;
  background:var(--bg);border:1px solid var(--border-hairline);
  border-radius:var(--r-lg);padding:28px 28px;
  transition:border-color var(--dur),transform var(--dur),box-shadow var(--dur);
}
.topic-item:hover{border-color:var(--gold-400);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.topic-num{
  flex-shrink:0;width:42px;height:42px;border-radius:50%;
  background:var(--gold-050);color:var(--gold-700);
  display:flex;align-items:center;justify-content:center;
  font-family:'Libre Baskerville',Georgia,serif;font-weight:700;font-size:17px;
}
.topic-title{font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;font-size:19px;font-weight:700;color:var(--navy-800);margin-bottom:6px}
.topic-desc{font-size:14.5px;color:var(--ink-secondary);line-height:1.65}

/* ═══════════════ 导师（YTP）═══ */
.mentors-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(16px,2vw,22px);max-width:900px;margin:0 auto}
.mentor-card{
  display:flex;flex-direction:column;gap:6px;
  background:var(--bg);border:1px solid var(--border-hairline);
  border-radius:var(--r-md);padding:20px 22px;
  transition:border-color var(--dur),transform var(--dur),box-shadow var(--dur);
  color:inherit;text-decoration:none;
}
a.mentor-card{cursor:pointer}
.mentor-card:hover{border-color:var(--border);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.mentor-name{font-size:16px;font-weight:600;color:var(--ink-primary);line-height:1.3}
.mentor-role{font-size:14px;font-style:italic;color:var(--gold-500);font-weight:500;line-height:1.4}
.mentor-topic{font-size:13px;font-style:italic;color:var(--ink-secondary);line-height:1.55}

/* ═══════════════ 收获列表（YTP）═══ */
.outcome-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(20px,2.5vw,28px);max-width:1100px;margin:0 auto}
.outcome-card{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--bg-alt);border:1px solid var(--border-hairline);
  border-radius:var(--r-lg);padding:26px 24px;
  transition:border-color var(--dur),transform var(--dur);
}
.outcome-card:hover{border-color:var(--gold-300);transform:translateY(-2px)}
.outcome-icon{
  flex-shrink:0;width:40px;height:40px;border-radius:var(--r-sm);
  background:linear-gradient(135deg,var(--navy-700),var(--navy-800));
  color:var(--gold-400);display:flex;align-items:center;justify-content:center;
  font-family:'Libre Baskerville',Georgia,serif;font-weight:700;font-size:17px;
}
.outcome-title{font-size:16px;font-weight:600;color:var(--ink-primary);margin-bottom:4px}
.outcome-desc{font-size:14px;color:var(--ink-secondary);line-height:1.6}

/* ═══════════════ 步骤（YTP）═══ */
.steps{max-width:720px;margin:0 auto;display:flex;flex-direction:column}
.step{
  display:flex;gap:20px;align-items:flex-start;
  padding:26px 0;border-bottom:1px solid var(--border-hairline);
}
.step:last-child{border-bottom:0}
.step-num{
  flex-shrink:0;width:44px;height:44px;border-radius:50%;
  background:var(--navy-800);color:var(--gold-400);
  display:flex;align-items:center;justify-content:center;
  font-family:'Libre Baskerville',Georgia,serif;font-weight:700;font-size:18px;
}
.step-title{font-size:17px;font-weight:600;color:var(--ink-primary);margin-bottom:6px}
.step-desc{font-size:14.5px;color:var(--ink-secondary);line-height:1.65}
.step-desc a{color:var(--navy-700);font-weight:500;text-decoration:underline}

/* ═══════════════ 价格 ═══════════════ */
.price-block{text-align:center;max-width:900px;margin:0 auto}
.price-amount{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:clamp(20px,2.4vw,30px);font-weight:700;color:var(--navy-800);
  line-height:1.3;margin-bottom:14px;white-space:nowrap;
}
.price-note{font-size:14px;color:var(--ink-muted);line-height:1.6;max-width:min(640px,100%);margin:0 auto}
.fee-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:32px 28px;max-width:420px;margin:0 auto;
}

/* ═══════════════ CTA ═══════════════ */
.cta-block{
  text-align:center;max-width:720px;margin:0 auto;
  background:var(--navy-050);border:1px solid var(--navy-100);
  border-radius:var(--r-xl);padding:clamp(40px,5vw,60px);
}
.cta-title{
  font-family:'Libre Baskerville',Georgia,'SimSun','宋体',serif;
  font-size:clamp(24px,3vw,34px);font-weight:700;color:var(--navy-800);
  margin-bottom:14px;line-height:1.2;text-wrap:balance;
}
.cta-desc{font-size:15px;color:var(--ink-secondary);line-height:1.65;max-width:min(520px,100%);margin:0 auto 28px}
.cta-info{
  display:inline-flex;flex-direction:column;align-items:center;gap:6px;
  padding:16px 28px;background:rgba(255,255,255,0.6);
  border:1px solid var(--border-hairline);border-radius:var(--r-md);
  margin-bottom:28px;
}
.cta-info strong{font-size:15px;font-weight:600;color:var(--ink-primary)}
.cta-info span{font-size:13px;color:var(--ink-muted)}

/* ═══════════════ BUTTONS ═══════════════ */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:'Inter','Noto Sans SC',sans-serif;font-size:13px;font-weight:500;letter-spacing:0.03em;padding:13px 26px;border-radius:var(--r-sm);transition:background var(--dur),color var(--dur),opacity var(--dur),transform var(--dur-fast);white-space:nowrap;min-height:44px}
.btn-gold{background:var(--gold-600);color:#fff}.btn-gold:hover{background:var(--gold-500);transform:translateY(-1px)}
.btn-primary{background:var(--navy-800);color:#fff}.btn-primary:hover{background:var(--navy-700);transform:translateY(-1px)}

/* ═══════════════ FOOTER ═══════════════ */
.footer{background:var(--navy-900);color:rgba(255,255,255,0.55);text-align:center;padding:40px 0;font-size:13px}

/* ═══════════════ 双语切换 ═══════════════ */
body [lang="en"],body [lang="zh"]{display:none}
html[lang="en"] body [lang="en"],html[lang="zh"] body [lang="zh"]{display:revert}

/* ═══════════════ 滚动显现（渐进显示）═══════════════
   仅在 JS 可用时（<html class="js">，由 head 内联脚本添加）才隐藏待显现元素；
   无 JS / 搜索引擎抓取时内容默认完整可见，杜绝"被隐藏/截断"。
   各区块不设内部滚动条，内容随整页滚动渐进淡入。 */
.js .reveal{opacity:0;transform:translateY(32px);transition:opacity .8s var(--ease-out-expo),transform .8s var(--ease-out-expo)}
.js .reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.08s}
.reveal-delay-2{transition-delay:.16s}
.reveal-delay-3{transition-delay:.24s}
.reveal-delay-4{transition-delay:.32s}
/* 杜绝内部滚动条：
   overflow-x:hidden 会令 overflow-y 计算为 auto（形成滚动容器，易触发内部滚动条）；
   改用 overflow-x:clip 裁剪横向溢出且不产生滚动容器，纵向保持 visible，内容完整呈现。
   （旧浏览器回退 overflow-x:hidden，仅作为横向溢出兜底） */

/* ═══════════════ RESPONSIVE ═══════════════ */
@media(max-width:1024px){
  .card-grid,.testimonials-grid,.outcome-grid{max-width:720px}
}
@media(max-width:768px){
  .card-grid,.testimonials-grid,.outcome-grid{grid-template-columns:1fr;max-width:520px}
  .mentors-grid{grid-template-columns:1fr;max-width:420px}
  .meta-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .meta-item:nth-child(2)::before{display:none}
  .back-link{top:14px}
  .top-actions{top:14px;gap:8px}
  .apply-btn{padding:0 16px;font-size:12px}
  .lang-switcher button{padding:0 12px;font-size:12px}
  .hero{padding:clamp(120px,20vw,160px) 0 clamp(60px,10vw,88px)}
  .price-amount{white-space:normal;font-size:clamp(18px,4vw,22px)}
}
@media(max-width:480px){
  .card{padding:28px 22px}
  .testimonial-card{padding:28px 22px}
  .topic-item{padding:22px 20px;gap:14px}
  .step{gap:14px}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms!important;transition-duration:0.01ms!important}
}

/* ═══════════════════════════════════════════
   THEME — 深色模式：深蓝文字 → 白色
   ═══════════════════════════════════════════ */
[data-theme="dark"] .section-title,
[data-theme="dark"] .meta-value,
[data-theme="dark"] .card-title,
[data-theme="dark"] .prose-title,
[data-theme="dark"] .topic-title,
[data-theme="dark"] .price-amount,
[data-theme="dark"] .cta-title,
[data-theme="dark"] .step-desc a,
[data-theme="dark"] .back-link:hover,
[data-theme="dark"] .lang-switcher button:hover:not(.active){
  color:#fff;
}

/* ── CTA 区块深色适配：浅蓝白背景 → 深色，标题 → 金色 ── */
[data-theme="dark"] .cta-block{
  background:var(--paper-100);
  border-color:var(--border-hairline);
}
[data-theme="dark"] .cta-title{
  color:var(--gold-500);
}
[data-theme="dark"] .cta-info{
  background:rgba(255,255,255,0.04);
  border-color:var(--border-hairline);
}