/* ============================================
   Alina 霖子 | 个人品牌网站 - 全局样式
   暗色主题 · GEO优化 · 移动端优先
   ============================================ */

/* --- CSS变量（设计系统）--- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --bg-input: #16162a;
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #6a6a85;
  --text-accent: #c4a0ff;
  --accent-primary: #7c5cfc;
  --accent-secondary: #ff6b9d;
  --accent-gradient: linear-gradient(135deg, #7c5cfc 0%, #ff6b9d 100%);
  --accent-glow: rgba(124, 92, 252, 0.3);
  --success: #4ade80;
  --warning: #fbbf24;
  --error: #f87171;
  --border-color: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px;
  --space-xl: 32px; --space-2xl: 48px; --space-3xl: 64px; --space-4xl: 96px;
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 16px; --radius-xl: 24px; --radius-full: 9999px;
  --font-sans: -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --font-serif: Georgia,'Noto Serif SC',serif;
  --transition-fast: 150ms ease; --transition-normal: 250ms ease; --transition-slow: 400ms ease;
  --container-max: 1200px; --container-narrow: 800px;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; -webkit-text-size-adjust:100%; }
body { font-family:var(--font-sans); background:var(--bg-primary); color:var(--text-primary); line-height:1.7; overflow-x:hidden; -webkit-font-smoothing:antialiased; }
img { max-width:100%; height:auto; display:block; }
a { color:var(--accent-primary); text-decoration:none; transition:color var(--transition-fast); }
a:hover { color:var(--text-accent); }
ul,ol { list-style:none; }
h1,h2,h3,h4,h5,h6 { line-height:1.3; font-weight:700; }

.container { width:100%; max-width:var(--container-max); margin:0 auto; padding:0 var(--space-md); }
.container--narrow { max-width:var(--container-narrow); }

/* 导航栏 */
.navbar { position:fixed; top:0; left:0; right:0; z-index:1000; padding:var(--space-md) 0; background:rgba(10,10,15,0.85); backdrop-filter:blur(20px); border-bottom:1px solid var(--border-color); transition:all var(--transition-normal); }
.navbar.scrolled { padding:12px 0; background:rgba(10,10,15,0.95); }
.navbar__inner { display:flex; align-items:center; justify-content:space-between; }
.navbar__logo { display:flex; align-items:center; gap:var(--space-sm); font-size:1.25rem; font-weight:700; color:var(--text-primary)!important; }
.navbar__logo-icon { width:36px; height:36px; background:var(--accent-gradient); border-radius:var(--radius-md); display:flex; align-items:center; justify-content:center; color:white; font-weight:900; font-size:1.1rem; }
.navbar__links { display:flex; align-items:center; gap:var(--space-lg); }
.navbar__link { color:var(--text-secondary)!important; font-size:0.95rem; font-weight:500; position:relative; }
.navbar__link::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:var(--accent-gradient); transition:width var(--transition-normal); }
.navbar__link:hover{color:var(--text-primary)!important;}
.navbar__link:hover::after,.navbar__link.active::after{width:100%;}
.navbar__link.active{color:var(--text-primary)!important;}
.navbar__cta { padding:10px 22px; background:var(--accent-gradient); color:white!important; border-radius:var(--radius-full); font-size:0.9rem; font-weight:600; transition:transform var(--transition-fast),box-shadow var(--transition-fast); }
.navbar__cta:hover{transform:translateY(-1px); box-shadow:var(--shadow-glow);color:white!important;}
.navbar__toggle{display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none; padding:8px;}
.navbar__toggle span{width:24px; height:2px; background:var(--text-primary); border-radius:2px; transition:all var(--transition-normal);}

/* Hero */
.hero { position:relative; min-height:100vh; display:flex; align-items:center; padding:120px 0 80px; overflow:hidden; }
.hero::before { content:''; position:absolute; top:-50%; left:-50%; width:200%; height:200%;
  background:radial-gradient(circle at 30% 50%, rgba(124,92,252,0.08) 0%, transparent 50%),
             radial-gradient(circle at 70% 30%, rgba(255,107,157,0.06) 0%, transparent 50%);
  animation:heroGlow 15s ease-in-out infinite alternate; }
@keyframes heroGlow { 0%{transform:translate(0,0)} 100%{transform:translate(-5%,3%)} }
.hero__content{position:relative;z-index:1;max-width:720px;}
.hero__badge{display:inline-flex;align-items:center;gap:var(--space-sm);padding:8px 18px;background:rgba(124,92,252,0.12);border:1px solid rgba(124,92,252,0.25);border-radius:var(--radius-full);font-size:0.85rem;color:var(--text-accent);margin-bottom:var(--space-xl);animation:fadeInUp .6s ease forwards;}
.hero__badge-dot{width:8px;height:8px;background:var(--accent-primary);border-radius:50%;animation:pulse 2s ease-in-out infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero__title{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;line-height:1.15;margin-bottom:var(--space-lg);animation:fadeInUp .6s ease .1s both;}
.hero__title{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;line-height:1.15;margin-bottom:var(--space-lg);animation:fadeInUp .6s ease .1s both;display:flex;flex-wrap:wrap;align-items:baseline;gap:.2em;}
.hero__title span[style*="background"]{font-size:1em;font-weight:800;line-height:1.15;display:inline;vertical-align:baseline;}
.hero__title .highlight{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.hero__subtitle{font-size:clamp(1.05rem,2vw,1.25rem);color:var(--text-secondary);line-height:1.8;margin-bottom:var(--space-2xl);max-width:580px;animation:fadeInUp .6s ease .2s both;}
.hero__actions{display:flex;flex-wrap:wrap;gap:var(--space-md);animation:fadeInUp .6s ease .3s both;}
@keyframes fadeInUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:14px 28px;border-radius:var(--radius-full);font-size:1rem;font-weight:600;cursor:pointer;border:none;transition:all var(--transition-normal);white-space:nowrap;text-decoration:none;}
.btn--primary{background:var(--accent-gradient);color:white;box-shadow:0 4px 20px rgba(124,92,252,.35);}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 6px 30px rgba(124,92,252,.5);color:white;}
.btn--secondary{background:transparent;color:var(--text-primary);border:1px solid var(--border-hover);}
.btn--secondary:hover{background:rgba(255,255,255,.05);border-color:var(--text-muted);color:var(--text-primary);}
.btn--sm{padding:10px 20px;font-size:.9rem;} .btn--lg{padding:18px 36px;font-size:1.1rem;}

/* Section通用 */
.section{padding:var(--space-4xl)0;}
.section--alt{background:var(--bg-secondary);}
.section__header{text-align:center;max-width:680px;margin:0 auto var(--space-3xl);}
.section__tag{display:inline-block;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--accent-primary);margin-bottom:var(--space-md);}
.section__title{font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:var(--space-md);}
.section__desc{font-size:1.05rem;color:var(--text-secondary);}

/* 数据/社会证明 */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-xl);padding:var(--space-2xl)0;}
.stat__item{text-align:center;padding:var(--space-lg);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:all var(--transition-normal);}
.stat__item:hover{background:var(--bg-card-hover);border-color:var(--border-hover);transform:translateY(-4px);}
.stat__number{font-size:clamp(2rem,4vw,3rem);font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2;margin-bottom:var(--space-xs);}
.stat__label{font-size:.95rem;color:var(--text-secondary);}

/* 产品卡片 */
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--space-xl);}
.product-card{position:relative;padding:var(--space-2xl);background:var(--bg-card);border-radius:var(--radius-xl);border:1px solid var(--border-color);overflow:hidden;transition:all var(--transition-normal);}
.product-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent-gradient);opacity:0;transition:opacity var(--transition-normal);}
.product-card:hover{background:var(--bg-card-hover);border-color:var(--border-hover);transform:translateY(-6px);box-shadow:0 8px 40px rgba(0,0,0,.5);}
.product-card:hover::before{opacity:1;}
.product-card.featured{background:linear-gradient(135deg,rgba(124,92,252,.08),rgba(255,107,157,.05));border-color:rgba(124,92,252,.25)}
.product-badge{display:inline-block;padding:4px 12px;font-size:.75rem;font-weight:600;border-radius:var(--radius-full);margin-bottom:var(--space-md);}
.product-badge--hot{background:rgba(255,107,157,.15);color:var(--accent-secondary);}
.product-badge--new{background:rgba(74,222,128,.15);color:var(--success);}
.product-badge--popular{background:rgba(124,92,252,.15);color:var(--accent-primary);}
.product-card__name{font-size:1.35rem;font-weight:700;margin-bottom:var(--space-sm);}
.product-card__price{font-size:1.75rem;font-weight:800;color:var(--text-accent);margin-bottom:var(--space-md);}
.product-card__price .original{font-size:1rem;color:var(--text-muted);text-decoration:line-through;font-weight:400;margin-left:var(--space-sm);}
.product-card__desc{color:var(--text-secondary);font-size:.95rem;margin-bottom:var(--space-lg);line-height:1.7;}
.product-card__features{margin-bottom:var(--space-xl);}
.product-card__feature{display:flex;align-items:flex-start;gap:var(--space-sm);padding:8px 0;font-size:.93rem;color:var(--text-secondary);}
.product-card__feature-icon{color:var(--success);flex-shrink:0;margin-top:2px;}

/* 关于页面 */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3xl);align-items:center;}
.about-image{border-radius:var(--radius-xl);overflow:hidden;aspect-ratio:3/4;background:var(--bg-card);border:1px solid var(--border-color);}
.about-image-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--bg-card),var(--bg-secondary));color:var(--text-muted);font-size:.9rem;gap:var(--space-sm);}
.about-text h2{font-size:clamp(1.75rem,3vw,2.25rem);margin-bottom:var(--space-lg);}
.about-text p{color:var(--text-secondary);margin-bottom:var(--space-md);font-size:1.02rem;}
.about-highlights{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md);margin-top:var(--space-xl);}
.highlight-item{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-md);background:var(--bg-card);border-radius:var(--radius-md);font-size:.95rem;}
.highlight-item-icon{width:36px;height:36px;background:rgba(124,92,252,.12);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0;}

/* 时间线 */
.timeline{position:relative;max-width:720px;margin:0 auto;padding-left:var(--space-2xl);}
.timeline::before{content:'';position:absolute;left:16px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--accent-primary),var(--accent-secondary));}
.timeline__item{position:relative;padding-bottom:var(--space-2xl);}
.timeline__item::before{content:'';position:absolute;left:calc(-1*var(--space-2xl)+10px);top:4px;width:14px;height:14px;border-radius:50%;background:var(--bg-primary);border:3px solid var(--accent-primary);}
.timeline__year{font-size:.85rem;font-weight:700;color:var(--accent-primary);margin-bottom:var(--space-xs);}
.timeline__content h3{font-size:1.15rem;margin-bottom:var(--space-xs);}
.timeline__content p{color:var(--text-secondary);font-size:.95rem;}

/* 文章列表 */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:var(--space-xl);}
.article-card{background:var(--bg-card);border-radius:var(--radius-xl);border:1px solid var(--border-color);overflow:hidden;transition:all var(--transition-normal);}
.article-card:hover{background:var(--bg-card-hover);border-color:var(--border-hover);transform:translateY(-4px);box-shadow:0 4px 20px rgba(0,0,0,.4);}
.article-card__image{aspect-ratio:16/9;background:linear-gradient(135deg,var(--bg-secondary),var(--bg-card));overflow:hidden;}
.article-card__image-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:.85rem;}
.article-card__body{padding:var(--space-lg);}
.article-card__category{display:inline-block;font-size:.78rem;font-weight:600;color:var(--accent-primary);text-transform:uppercase;letter-spacing:1px;margin-bottom:var(--space-sm);}
.article-card__title{font-size:1.15rem;font-weight:700;margin-bottom:var(--space-sm);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.article-card__title a{color:var(--text-primary)!important;}
.article-card__title a:hover{color:var(--accent-primary)!important;}
.article-card__excerpt{font-size:.93rem;color:var(--text-secondary);line-height:1.65;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--space-md);}
.article-card__meta{display:flex;align-items:center;gap:var(--space-md);font-size:.83rem;color:var(--text-muted);}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--border-color);}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:var(--space-lg)0;background:none;border:none;color:var(--text-primary);font-size:1.05rem;font-weight:600;text-align:left;cursor:pointer;transition:color var(--transition-fast);}
.faq-question:hover{color:var(--accent-primary);}
.faq-question-icon{font-size:1.5rem;color:var(--text-muted);transition:transform var(--transition-normal);flex-shrink:0;margin-left:var(--space-md);}
.faq-item.open .faq-question-icon{transform:rotate(45deg);color:var(--accent-primary);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height var(--transition-slow);}
.faq-answer-inner{padding-bottom:var(--space-lg);color:var(--text-secondary);line-height:1.75;font-size:.97rem;}

/* 联系表单 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3xl);}
.contact-form{display:flex;flex-direction:column;gap:var(--space-lg);}
.form-group label{display:block;font-size:.9rem;font-weight:600;color:var(--text-secondary);margin-bottom:var(--space-sm);}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:14px 18px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);font-size:1rem;transition:all var(--transition-fast);outline:none;}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px rgba(124,92,252,.15);}
.form-group textarea{min-height:140px;resize:vertical;}
.contact-info-list{display:flex;flex-direction:column;gap:var(--space-xl);}
.contact-info-item{display:flex;align-items:flex-start;gap:var(--space-md);}
.contact-info-icon{width:48px;height:48px;background:rgba(124,92,252,.12);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.3rem;}
.contact-info-label{font-size:.85rem;color:var(--text-muted);margin-bottom:var(--space-xs);}
.contact-info-value{font-size:1.02rem;font-weight:500;}

/* Footer */
.footer{padding:var(--space-3xl) 0 var(--space-xl);border-top:1px solid var(--border-color);background:var(--bg-secondary);}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-2xl);margin-bottom:var(--space-2xl);}
.footer__brand p{color:var(--text-secondary);font-size:.93rem;margin-top:var(--space-md);max-width:300px;}
.footer__col h4{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);margin-bottom:var(--space-md);}
.footer__col a{display:block;color:var(--text-secondary);font-size:.93rem;padding:5px 0;transition:color var(--transition-fast);}
.footer__col a:hover{color:var(--text-primary);}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding-top:var(--space-xl);border-top:1px solid var(--border-color);font-size:.85rem;color:var(--text-muted);}
.footer__social{display:flex;gap:var(--space-md);}
.footer__social a{width:38px;height:38px;display:flex;align-items:center;justify-content:center;background:var(--bg-card);border-radius:var(--radius-md);color:var(--text-secondary)!important;font-size:1.1rem;transition:all var(--transition-fast);}
.footer__social a:hover{background:var(--accent-primary);color:white!important;transform:translateY(-2px);}

/* 子页面Hero */
.page-hero{padding:140px 0 60px;text-align:center;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);}
.page-hero__title{font-size:clamp(2rem,5vw,3rem);margin-bottom:var(--space-md);}
.page-hero__desc{font-size:1.1rem;color:var(--text-secondary);max-width:560px;margin:0 auto;}

/* CTA横幅 */
.cta-banner{padding:var(--space-3xl)0;text-align:center;background:linear-gradient(135deg,rgba(124,92,252,.1),rgba(255,107,157,.07));border-radius:var(--radius-xl);margin:var(--space-2xl) auto;max-width:900px;}
.cta-banner h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:var(--space-md);}
.cta-banner p{color:var(--text-secondary);font-size:1.05rem;margin-bottom:var(--space-xl);max-width:520px;margin-left:auto;margin-right:auto;}

/* 金句引用块 */
.quote-block{position:relative;padding:var(--space-2xl) var(--space-3xl);background:var(--bg-card);border-left:4px solid var(--accent-primary);border-radius:0 var(--radius-lg) var(--radius-lg)0;margin:var(--space-2xl)0;font-family:var(--font-serif);font-size:1.2rem;font-style:italic;color:var(--text-secondary);line-height:1.8;}
.quote-block::before{content:'"';position:absolute;top:-10px;left:20px;font-size:4rem;color:var(--accent-primary);opacity:.3;font-family:Georgia,serif;line-height:1;}
.quote-author{display:block;margin-top:var(--space-md);font-size:.9rem;font-style:normal;font-weight:600;color:var(--text-accent);}

/* 标签 */
.tags{display:flex;flex-wrap:wrap;gap:var(--space-sm);}
.tag{padding:5px 14px;background:rgba(124,92,252,.1);border:1px solid rgba(124,92,252,.2);border-radius:var(--radius-full);font-size:.82rem;color:var(--text-accent);transition:all var(--transition-fast);}
.tag:hover{background:rgba(124,92,252,.2);border-color:var(--accent-primary);}

/* 回到顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:var(--accent-primary);color:white;border:none;border-radius:50%;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(124,92,252,.4);opacity:0;visibility:hidden;transition:all var(--transition-normal);z-index:999;}
.back-to-top.visible{opacity:1;visibility:visible;}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(124,92,252,.5);}

/* 响应式：平板 */
@media(max-width:1024px){
  .footer__grid{grid-template-columns:1fr 1fr;gap:var(--space-xl);}
  .about-grid{grid-template-columns:1fr;gap:var(--space-2xl);}
  .contact-grid{grid-template-columns:1fr;}
}

/* 响应式：手机 */
@media(max-width:768px){
  .navbar__links{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(10,10,15,.97);flex-direction:column;align-items:center;justify-content:center;gap:var(--space-xl);padding:var(--space-xl);}
  .navbar__links.open{display:flex;}
  .navbar__toggle{display:flex;}
  .hero{padding:100px 0 60px;}
  .hero__title{font-size:clamp(2rem,8vw,3rem);}
  .stats{grid-template-columns:repeat(2,1fr);}
  .products-grid{grid-template-columns:1fr;}
  .articles-grid{grid-template-columns:1fr;}
  .about-highlights{grid-template-columns:1fr;}
  .footer__grid{grid-template-columns:1fr;text-align:center;}
  .footer__brand p{margin-left:auto;margin-right:auto;}
  .footer__bottom{flex-direction:column;gap:var(--space-md);text-align:center;}
  .section{padding:var(--space-2xl)0;}
  .section__header{margin-bottom:var(--space-2xl);}
}