/* ============================================================
   每日大赛网页版 — 设计系统
   风格：暖纸底 · 硬边几何 · 荧光点缀 · 杂志式粗排版
   ============================================================ */

:root{
  --paper:#FAF6EE;
  --paper-2:#F2EBDE;
  --paper-3:#EBE3D3;
  --ink:#241C3B;
  --ink-70:rgba(36,28,59,.70);
  --ink-45:rgba(36,28,59,.45);
  --line:rgba(36,28,59,.16);
  --lime:#D8FF3E;
  --coral:#FF6B57;
  --lilac:#B9A7FF;
  --mint:#8FE3C8;
  --white:#FFFFFF;
  --r-sm:12px;
  --r-md:20px;
  --r-lg:32px;
  --shadow-hard:5px 5px 0 var(--ink);
  --ease:cubic-bezier(.22,.9,.28,1);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  font-family: system-ui,'PingFang SC','Microsoft YaHei',sans-serif;
  overflow-x:hidden;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(36,28,59,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36,28,59,.035) 1px, transparent 1px);
  background-size:48px 48px;
  background-attachment:fixed;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

::selection{ background:var(--lime); color:var(--ink); }

img{ max-width:100%; display:block; }
a{ color:inherit; }

/* 滚动条 */
::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background:var(--paper-2); }
::-webkit-scrollbar-thumb{ background:var(--ink); border-radius:20px; border:2px solid var(--paper-2); }

/* ---------------- 核心布局 ---------------- */
.container{ max-width:1200px; margin:0 auto; padding:0 24px; }

.section{ padding:96px 0; position:relative; }

.section:nth-child(even){
  background:var(--paper-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background-image:
    radial-gradient(rgba(36,28,59,.06) 1.2px, transparent 1.2px);
  background-size:22px 22px;
}

/* ---------------- 导航 ---------------- */
.site-header{
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(250,246,238,.82);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--line);
}

.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:68px; max-width:1200px; margin:0 auto; padding:0 24px;
}

.logo{
  display:flex; align-items:center; gap:10px;
  font-weight:800; font-size:1.2rem; text-decoration:none; color:var(--ink);
  letter-spacing:-.03em;
}

.logo-icon{
  width:36px; height:36px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; font-weight:800;
  background:var(--lime); color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.logo:hover .logo-icon{ transform:translate(-1px,-1px) rotate(-6deg); box-shadow:5px 5px 0 var(--ink); }

.main-nav{ display:flex; align-items:center; gap:26px; list-style:none; }

.main-nav a{
  position:relative; text-decoration:none;
  font-size:.9rem; font-weight:600; color:var(--ink-70);
  transition:color .2s var(--ease), opacity .2s;
  padding:4px 0;
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:0;
  width:100%; height:2px; background:var(--coral);
  transform:scaleX(0); transform-origin:left;
  transition:transform .3s var(--ease);
}
.main-nav a:hover{ color:var(--ink); }
.main-nav a:hover::after{ transform:scaleX(1); }

.nav-cta{
  padding:9px 22px; border-radius:999px;
  background:var(--ink); color:var(--paper)!important;
  font-weight:700; font-size:.85rem;
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 var(--lilac);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{ background:var(--coral); transform:translate(2px,2px); box-shadow:2px 2px 0 var(--lilac); }

.menu-toggle{
  display:none; align-items:center; justify-content:center;
  width:42px; height:42px; cursor:pointer;
  background:var(--lime); color:var(--ink);
  border:2px solid var(--ink); border-radius:12px;
  box-shadow:3px 3px 0 var(--ink);
  font-size:1.1rem;
}

/* ---------------- Hero ---------------- */
.hero{
  min-height:70vh;
  display:flex; align-items:center;
  position:relative; isolation:isolate;
  padding:150px 0 90px;
}

.hero::before{
  content:'';
  position:absolute; inset:-10% -5%;
  z-index:-1;
  background:
    radial-gradient(440px 440px at 86% 14%, rgba(185,167,255,.55), transparent 68%),
    radial-gradient(380px 380px at 8% 88%, rgba(216,255,62,.55), transparent 68%),
    radial-gradient(300px 300px at 55% 100%, rgba(143,227,200,.42), transparent 70%);
  filter:blur(6px);
}

.hero-content{ max-width:760px; animation:rise .9s var(--ease) both; }

@keyframes rise{
  from{ opacity:0; transform:translateY(26px); }
  to{ opacity:1; transform:none; }
}

.hero-eyebrow{
  display:inline-block;
  font-size:.75rem; font-weight:800;
  letter-spacing:.26em; text-transform:uppercase;
  padding:7px 18px; border-radius:999px; margin-bottom:22px;
  background:var(--white); color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 var(--lime);
}

.hero h1{
  font-size:clamp(2.5rem, 6.2vw, 4.4rem);
  line-height:1.04;
  letter-spacing:-.045em;
  font-weight:900;
  margin-bottom:22px;
  text-wrap:balance;
}

.hero p{
  font-size:clamp(1rem,1.6vw,1.15rem);
  color:var(--ink-70);
  max-width:560px; margin-bottom:36px;
}

.hero-buttons{ display:flex; gap:16px; flex-wrap:wrap; }

.hero-image{
  border-radius:var(--r-md); overflow:hidden;
  border:2px solid var(--ink);
  box-shadow:8px 8px 0 var(--ink);
  margin-top:56px;
}
.hero-image img{ width:100%; height:auto; }

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 30px; border-radius:999px;
  font-weight:700; font-size:.95rem; cursor:pointer;
  border:2px solid var(--ink); text-decoration:none;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s;
  box-shadow:var(--shadow-hard);
  letter-spacing:.01em;
}

.btn-primary{ background:var(--lime); color:var(--ink); }
.btn-primary:hover{ background:var(--coral); transform:translate(3px,3px); box-shadow:2px 2px 0 var(--ink); }

.btn-outline{ background:transparent; color:var(--ink); box-shadow:5px 5px 0 var(--lilac); }
.btn-outline:hover{ background:var(--ink); color:var(--paper); transform:translate(3px,3px); box-shadow:2px 2px 0 var(--lilac); }

/* ---------------- 章节标题 ---------------- */
.section-label{
  display:inline-block;
  font-size:.72rem; font-weight:800;
  letter-spacing:.3em; text-transform:uppercase;
  color:var(--coral); margin-bottom:14px;
}
.section-label::before{ content:'— '; letter-spacing:0; }

.section-title{
  font-size:clamp(1.75rem, 3.6vw, 2.6rem);
  font-weight:900;
  letter-spacing:-.035em;
  line-height:1.15;
  margin-bottom:16px;
  text-wrap:balance;
}

.section-desc{
  max-width:600px; color:var(--ink-70);
  margin-bottom:48px; font-size:1.02rem;
}

h2{ font-size:clamp(1.6rem,3vw,2.2rem); font-weight:900; letter-spacing:-.03em; line-height:1.2; }
h3{ font-weight:800; letter-spacing:-.02em; }

/* ---------------- 卡片网格 ---------------- */
.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:26px;
}

.category-card{
  position:relative;
  background:var(--white);
  border:2px solid var(--ink);
  border-radius:var(--r-md);
  padding:30px 28px;
  box-shadow:5px 5px 0 rgba(36,28,59,.9);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease);
  overflow:hidden;
}
.category-card::after{
  content:'';
  position:absolute; right:-40px; top:-40px;
  width:100px; height:100px; border-radius:50%;
  background:var(--lime); opacity:.35;
  transition:transform .4s var(--ease);
}
.category-card:hover{
  transform:translate(-4px,-4px);
  box-shadow:9px 9px 0 var(--coral);
}
.category-card:hover::after{ transform:scale(1.9); }

.card-icon{
  position:relative; z-index:1;
  width:48px; height:48px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.3rem;
  background:var(--mint); color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}

.category-card h3{ position:relative; z-index:1; font-size:1.12rem; margin-bottom:8px; }
.category-card p{ position:relative; z-index:1; font-size:.92rem; color:var(--ink-70); margin-bottom:16px; }

.card-link{
  position:relative; z-index:1;
  font-weight:800; font-size:.85rem; text-decoration:none;
  color:var(--ink);
  border-bottom:2px solid var(--coral);
  padding-bottom:2px;
  transition:color .2s, border-color .2s;
}
.card-link:hover{ color:var(--coral); border-color:var(--ink); }

/* ---------------- 特性块 ---------------- */
.feature-block{
  display:grid; grid-template-columns:1fr 1fr;
  gap:56px; align-items:center;
}

.feature-image{
  border-radius:var(--r-md); overflow:hidden;
  border:2px solid var(--ink);
  box-shadow:8px 8px 0 var(--lilac);
  background:var(--white);
}
.feature-image img{ width:100%; height:auto; }

.feature-text h2{ margin-bottom:16px; }
.feature-text p{ color:var(--ink-70); margin-bottom:22px; }

.feature-list{ list-style:none; }
.feature-list li{
  padding:8px 0; display:flex; align-items:center; gap:12px;
  font-weight:600; font-size:.96rem;
}
.feature-list li::before{
  content:'✓';
  flex:0 0 22px; width:22px; height:22px;
  display:flex; align-items:center; justify-content:center;
  font-weight:900; font-size:.7rem;
  background:var(--lime); color:var(--ink);
  border:1.5px solid var(--ink); border-radius:50%;
}

/* ---------------- 数据条 ---------------- */
.stats-bar{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:24px; text-align:center;
}

.stat-item{
  padding:30px 18px;
  border-radius:var(--r-md);
  border:2px solid var(--ink);
  background:var(--white);
  box-shadow:5px 5px 0 rgba(185,167,255,.85);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.stat-item:nth-child(2){ box-shadow:5px 5px 0 rgba(216,255,62,.9); }
.stat-item:nth-child(3){ box-shadow:5px 5px 0 rgba(143,227,200,.9); }
.stat-item:nth-child(4){ box-shadow:5px 5px 0 rgba(255,107,87,.75); }
.stat-item:hover{ transform:translateY(-6px); }

.stat-number{
  font-size:clamp(2rem,4vw,2.7rem);
  font-weight:900; line-height:1;
  letter-spacing:-.05em;
  font-variant-numeric:tabular-nums;
}
.stat-label{ font-size:.85rem; color:var(--ink-70); margin-top:10px; letter-spacing:.06em; }

/* ---------------- 内容墙 ---------------- */
.content-wall{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px,1fr));
  gap:26px;
}

.content-wall-item{
  border-radius:var(--r-md); overflow:hidden;
  background:var(--white);
  border:2px solid var(--ink);
  box-shadow:5px 5px 0 var(--ink);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease);
  display:flex; flex-direction:column;
}
.content-wall-item:hover{
  transform:translate(-4px,-4px);
  box-shadow:9px 9px 0 var(--lilac);
}
.content-wall-item img{
  width:100%; height:200px; object-fit:cover;
  border-bottom:2px solid var(--ink);
  filter:saturate(1.05) contrast(1.02);
}
.content-wall-body{ padding:22px; flex:1; }
.content-wall-body h3{ font-size:1.05rem; margin-bottom:8px; }
.content-wall-body p{ font-size:.9rem; color:var(--ink-70); }

/* ---------------- FAQ ---------------- */
.faq-list{ max-width:800px; margin:0 auto; }

.faq-item{
  border:2px solid var(--ink);
  border-radius:16px;
  background:var(--white);
  margin-bottom:12px;
  overflow:hidden;
  cursor:pointer;
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), background .22s;
  box-shadow:4px 4px 0 rgba(36,28,59,.85);
}
.faq-item:hover{ transform:translate(-2px,-2px); box-shadow:6px 6px 0 var(--lime); }

.faq-item .faq-question{
  padding:18px 22px; font-weight:800; font-size:1rem;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
}
.faq-item .faq-question::after{
  content:'+';
  flex:0 0 26px; width:26px; height:26px;
  display:flex; align-items:center; justify-content:center;
  font-size:1.1rem; font-weight:900; line-height:1;
  background:var(--lime); color:var(--ink);
  border:1.5px solid var(--ink); border-radius:8px;
  transition:transform .3s var(--ease), background .3s;
}
.faq-item.open .faq-question::after{
  content:'–'; background:var(--coral); color:var(--white);
  transform:rotate(180deg);
}

.faq-item .faq-answer{
  padding:0 22px 20px; display:none;
  color:var(--ink-70); font-size:.94rem;
  border-top:1px dashed var(--line);
  margin:0 22px; padding-left:0; padding-right:0; padding-top:14px;
}
.faq-item.open{ background:#FFFDF7; box-shadow:6px 6px 0 var(--lilac); }
.faq-item.open .faq-answer{ display:block; animation:rise .35s var(--ease) both; }

/* ---------------- CTA 横幅 ---------------- */
.cta-banner{
  position:relative;
  padding:72px 40px; text-align:center;
  border-radius:var(--r-lg);
  color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:10px 10px 0 var(--ink);
  overflow:hidden;
  background:linear-gradient(120deg, var(--lime) 0%, var(--mint) 48%, var(--lilac) 100%);
  background-size:200% 200%;
  animation:flow 14s ease-in-out infinite alternate;
}
@keyframes flow{
  from{ background-position:0% 50%; }
  to{ background-position:100% 50%; }
}
.cta-banner::before{
  content:'';
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(36,28,59,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36,28,59,.07) 1px, transparent 1px);
  background-size:32px 32px;
  pointer-events:none;
}
.cta-banner > *{ position:relative; z-index:1; }
.cta-banner h2{
  color:var(--ink); margin-bottom:14px;
  font-size:clamp(1.6rem,3.4vw,2.4rem);
  letter-spacing:-.035em;
}
.cta-banner p{ color:var(--ink-70); max-width:560px; margin:0 auto 30px; }
.cta-banner .btn-primary{
  background:var(--ink); color:var(--paper);
  border-color:var(--ink);
  box-shadow:5px 5px 0 rgba(255,255,255,.9);
}
.cta-banner .btn-primary:hover{
  background:var(--coral); color:var(--white);
  transform:translate(3px,3px); box-shadow:2px 2px 0 rgba(255,255,255,.9);
}

/* ---------------- 页脚 ---------------- */
.site-footer{
  padding:64px 0 28px;
  background:var(--paper-3);
  border-top:2px solid var(--ink);
  color:var(--ink);
}

.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
}

.footer-brand p{ color:var(--ink-70); font-size:.92rem; max-width:320px; margin-top:14px; }
.footer-brand .logo{ margin-bottom:4px; }

.footer-col h4{
  font-size:.78rem; font-weight:800;
  letter-spacing:.22em; text-transform:uppercase;
  color:var(--ink); margin-bottom:16px;
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:10px; }
.footer-col a{
  text-decoration:none; font-size:.92rem; color:var(--ink-70);
  transition:color .2s var(--ease), padding-left .2s var(--ease);
  display:inline-block;
}
.footer-col a:hover{ color:var(--coral); padding-left:6px; }

.footer-bottom{
  border-top:1px solid var(--line);
  margin-top:48px; padding-top:22px;
  text-align:center; font-size:.85rem; color:var(--ink-45);
}

/* ---------------- 工具类 ---------------- */
.text-accent{ color:var(--coral); }
.text-center{ text-align:center; }
.text-center .section-desc{ margin-left:auto; margin-right:auto; }
.seo-description{ max-width:600px; margin:0 auto 48px; color:var(--ink-70); }
.mt-0{ margin-top:0; }
.mb-0{ margin-bottom:0; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px){
  .footer-grid{ grid-template-columns:1.6fr 1fr 1fr; }
}

@media (max-width: 768px){
  .feature-block{ grid-template-columns:1fr; gap:36px; }
  .stats-bar{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
  .main-nav{ display:none; }
  .menu-toggle{ display:flex; }
  .main-nav.open{
    display:flex; flex-direction:column;
    position:absolute; top:68px; left:0; width:100%;
    background:var(--paper);
    border-bottom:2px solid var(--ink);
    padding:24px; gap:18px;
    align-items:flex-start;
    box-shadow:0 12px 0 rgba(36,28,59,.08);
  }
  .main-nav.open a{ font-size:1rem; }
  .nav-cta{ margin-top:6px; }
  .section{ padding:72px 0; }
  .hero{ padding:120px 0 72px; }
  .cta-banner{ padding:52px 24px; box-shadow:6px 6px 0 var(--ink); border-radius:24px; }
  .site-footer{ padding:52px 0 24px; }
}

@media (max-width: 480px){
  .cards-grid, .content-wall, .stats-bar{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .hero-buttons{ flex-direction:column; align-items:stretch; }
  .btn{ justify-content:center; }
  .category-card{ padding:24px 22px; }
  .stat-item{ padding:24px 16px; }
  .faq-item .faq-question{ font-size:.94rem; padding:16px 18px; }
}

/* 无障碍：减少动效 */
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
}