/* ============== 设计系统：CSS Variables ============== */
:root{
  color-scheme: light;
  --layout-width: 1140px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;

  /* 背景 */
  --body-bg: radial-gradient(circle at top right, #ffddcc52, transparent 24%),
             radial-gradient(circle at 12% 88%, #d8e6ff3d, transparent 28%),
             linear-gradient(180deg, #fbfaf7 0%, #f6f3ee 100%);
  --color-paper: #faf8f3;
  --color-surface: #ffffffcc;
  --color-surface-strong: #ffffffeb;
  --color-surface-soft: #f3eee6cc;

  /* 文字 */
  --color-ink-strong: #121a22;
  --color-ink-mid: #384654;
  --color-ink-soft: #78828d;
  --color-ink-faint: #a8b0ba;

  /* 边框 */
  --color-line: #121a221a;
  --color-card-border: #121a2214;
  --color-line-strong: #121a2230;

  /* 阴影 */
  --color-card-shadow: 0 18px 36px #121a220f, 0 2px 6px #121a2210;
  --color-float-shadow: 0 22px 60px #121a2226, 0 6px 14px #121a2218;

  /* 强调色 */
  --color-accent-strong: #0f5d8f;
  --color-accent-warm: #e0702f;
  --color-accent-cool: #2f8fe0;

  /* 分类色（tone-*） */
  --tone-ai-1: #ffb27a;
  --tone-ai-2: #6aa6ff;
  --tone-tools-1: #6aa6ff;
  --tone-tools-2: #5fd1a8;
  --tone-business-1: #b292ff;
  --tone-business-2: #c4b6a8;
  --tone-materials-1: #f5c869;
  --tone-materials-2: #8fd49d;

  /* 标签色 */
  --chip-orange-bg: #ffd9b8;  --chip-orange-ink: #b8541a;
  --chip-blue-bg:   #cfe3ff;  --chip-blue-ink:   #1a5bb8;
  --chip-mint-bg:   #c6f0dd;  --chip-mint-ink:   #1a8a5a;
  --chip-gold-bg:   #fbe6a8;  --chip-gold-ink:   #8a6b1a;
  --chip-violet-bg: #e1d2ff;  --chip-violet-ink: #6b3db8;

  /* 抽屉 */
  --drawer-bg: #ffffffeb;
  --mask-bg: #121a2240;

  /* 滚动条 */
  --scrollbar-thumb: #121a2222;

  /* 动效 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

:root[data-theme="dark"]{
  color-scheme: dark;
  --body-bg: radial-gradient(circle at top center, #6d95ff2e, transparent 28%),
             radial-gradient(circle at 90% 90%, #e0702f1f, transparent 32%),
             linear-gradient(180deg, #0a1017 0%, #0d141d 100%);
  --color-paper: #11161e;
  --color-surface: #161d27cc;
  --color-surface-strong: #1a2230e0;
  --color-surface-soft: #1c2531cc;

  --color-ink-strong: #eef2f8;
  --color-ink-mid: #b8c2d0;
  --color-ink-soft: #7e8a99;
  --color-ink-faint: #4f5765;

  --color-line: #ffffff14;
  --color-card-border: #ffffff1a;
  --color-line-strong: #ffffff30;

  --color-card-shadow: 0 18px 36px #00000040, 0 2px 6px #00000030;
  --color-float-shadow: 0 22px 60px #00000060, 0 6px 14px #00000040;

  --color-accent-strong: #6ab8ff;
  --color-accent-warm: #ff9054;

  --tone-ai-1: #ff9a5a;
  --tone-ai-2: #4d8eff;
  --tone-tools-1: #4d8eff;
  --tone-tools-2: #4dc99a;
  --tone-business-1: #9a7fff;
  --tone-business-2: #b8a898;
  --tone-materials-1: #e8b94d;
  --tone-materials-2: #6dc48a;

  --chip-orange-bg: #5a3a2040;  --chip-orange-ink: #ffb888;
  --chip-blue-bg:   #1a3a6e40;  --chip-blue-ink:   #8abaff;
  --chip-mint-bg:   #1a4a3640;  --chip-mint-ink:   #6fe0b0;
  --chip-gold-bg:   #4a3a1840;  --chip-gold-ink:   #f0d080;
  --chip-violet-bg: #3a286040;  --chip-violet-ink:   #c4a8ff;

  --drawer-bg: #11161eeb;
  --mask-bg: #00000080;
  --scrollbar-thumb: #ffffff22;
}

/* ============== Reset ============== */
*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body{
  font-family: "SF Pro Text", "SF Pro Display", -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--body-bg);
  background-attachment: fixed;
  color: var(--color-ink-strong);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
  transition: background-color .4s var(--ease-out);
}
img{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;}
input{font:inherit;color:inherit;}

::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:6px;border:2px solid transparent;background-clip:padding-box;}
::-webkit-scrollbar-thumb:hover{background:var(--color-line-strong);background-clip:padding-box;}

::view-transition-old(root){animation:none;}
::view-transition-new(root){animation:none;}

/* ============== 通用容器 ============== */
.shell{max-width:var(--layout-width);margin:0 auto;padding:0 22px;}

/* ============== HEADER ============== */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: var(--color-surface);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--color-line);
  transition: background .4s var(--ease-out), border-color .4s var(--ease-out);
}
.desktop-shell{display:flex;align-items:center;gap:22px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-logo{
  width:36px;height:36px;border-radius:10px;
  background: linear-gradient(135deg, var(--color-accent-warm), var(--color-accent-strong));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:16px;
  box-shadow: 0 6px 14px #e0702f44;
}
.brand-name{display:flex;flex-direction:column;line-height:1.1;}
.brand-name b{font-size:16px;letter-spacing:.4px;}
.brand-name small{font-size:11px;color:var(--color-ink-soft);font-weight:400;}

.header-tabs{display:flex;align-items:center;gap:4px;flex:1;margin-left:6px;}
.tab-btn{
  padding:8px 14px;border-radius:10px;font-size:14px;
  color:var(--color-ink-mid);font-weight:500;
  transition: all .28s var(--ease-out);
  position:relative;
}
.tab-btn:hover{color:var(--color-ink-strong);background:var(--color-surface-soft);}
.tab-btn.active{
  color:#fff;
  background: linear-gradient(135deg, var(--color-accent-strong), var(--color-accent-cool));
  box-shadow: 0 6px 14px #0f5d8f33;
}

.platform-links{display:flex;align-items:center;gap:4px;flex-shrink:0;}
.platform-links a{
  width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  color:var(--color-ink-soft);
  transition: all .28s var(--ease-out);
}
.platform-links a:hover{color:var(--color-accent-strong);background:var(--color-surface-soft);transform:translateY(-1px);}
.platform-links svg{width:18px;height:18px;}

.icon-btn{
  width:36px;height:36px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  color:var(--color-ink-mid);
  background:var(--color-surface-soft);
  border:1px solid var(--color-line);
  transition: all .28s var(--ease-out);
  flex-shrink:0;
}
.icon-btn:hover{color:var(--color-ink-strong);border-color:var(--color-line-strong);transform:translateY(-1px);}
.icon-btn svg{width:18px;height:18px;}

.search-trigger{display:flex;align-items:center;gap:8px;padding:0 14px;height:36px;border-radius:10px;background:var(--color-surface-soft);border:1px solid var(--color-line);color:var(--color-ink-soft);font-size:13px;min-width:180px;transition:all .28s var(--ease-out);}
.search-trigger:hover{border-color:var(--color-line-strong);color:var(--color-ink-mid);}
.search-trigger svg{width:16px;height:16px;}
.search-trigger kbd{margin-left:auto;font-size:11px;padding:1px 6px;border-radius:4px;background:var(--color-paper);border:1px solid var(--color-line);color:var(--color-ink-soft);font-family:inherit;}

/* 搜索面板展开 */
.search-panel{
  position:absolute;left:0;right:0;top:100%;
  background:var(--color-surface-strong);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--color-line);
  padding:22px 0 26px;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:all .36s var(--ease-out);
  box-shadow:var(--color-card-shadow);
}
.search-panel.open{transform:translateY(0);opacity:1;pointer-events:auto;}
.search-box{display:flex;align-items:center;gap:10px;background:var(--color-paper);border:1px solid var(--color-line);border-radius:12px;padding:10px 16px;}
.search-box:focus-within{border-color:var(--color-accent-strong);box-shadow:0 0 0 3px #0f5d8f1a;}
.search-box svg{width:18px;height:18px;color:var(--color-ink-soft);flex-shrink:0;}
.search-box input{flex:1;background:none;border:none;outline:none;font-size:15px;}
.search-hot{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.search-hot span{font-size:12px;color:var(--color-ink-soft);margin-right:4px;align-self:center;}
.hot-chip{padding:5px 12px;border-radius:14px;background:var(--color-surface-soft);border:1px solid var(--color-line);font-size:12px;color:var(--color-ink-mid);transition:all .24s var(--ease-out);}
.hot-chip:hover{color:var(--color-accent-strong);border-color:var(--color-accent-strong);}

/* 移动版 */
.mobile-shell{display:none;align-items:center;justify-content:space-between;height:58px;gap:10px;}
.mobile-shell .brand .brand-name small{display:none;}
.hamburger{width:38px;height:38px;border-radius:10px;background:var(--color-surface-soft);border:1px solid var(--color-line);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:4px;}
.hamburger span{display:block;width:18px;height:1.5px;background:var(--color-ink-mid);border-radius:2px;transition:all .3s var(--ease-out);}
.hamburger.open span:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}

/* 抽屉 */
.drawer-mask{position:fixed;inset:0;background:var(--mask-bg);opacity:0;pointer-events:none;transition:opacity .36s var(--ease-out);z-index:60;}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer-panel{
  position:fixed;left:0;top:0;bottom:0;
  width:min(84vw,336px);
  background:var(--drawer-bg);
  backdrop-filter:blur(20px);
  border-right:1px solid var(--color-line);
  transform:translateX(-100%);
  transition:transform .36s var(--ease-out);
  z-index:61;
  display:flex;flex-direction:column;
  padding:18px 16px;
  overflow-y:auto;
}
.drawer-panel.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;gap:10px;padding:8px 6px 18px;border-bottom:1px solid var(--color-line);margin-bottom:14px;}
.drawer-head .brand-logo{width:32px;height:32px;}
.drawer-tabs{display:flex;flex-direction:column;gap:4px;}
.drawer-tab{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-radius:10px;color:var(--color-ink-mid);font-weight:500;transition:all .24s var(--ease-out);}
.drawer-tab:hover{background:var(--color-surface-soft);color:var(--color-ink-strong);}
.drawer-tab.active{background:linear-gradient(135deg,var(--color-accent-strong),var(--color-accent-cool));color:#fff;}
.drawer-tab svg{width:16px;height:16px;opacity:.6;}
.drawer-section{margin-top:18px;padding-top:18px;border-top:1px solid var(--color-line);}
.drawer-section h4{font-size:12px;color:var(--color-ink-soft);font-weight:500;margin-bottom:10px;padding:0 6px;}
.drawer-platforms{display:flex;gap:6px;flex-wrap:wrap;}
.drawer-platforms a{flex:1;min-width:78px;display:flex;align-items:center;gap:6px;padding:10px;border-radius:10px;background:var(--color-surface-soft);border:1px solid var(--color-line);font-size:13px;color:var(--color-ink-mid);transition:all .24s var(--ease-out);}
.drawer-platforms a:hover{color:var(--color-accent-strong);border-color:var(--color-accent-strong);}
.drawer-platforms svg{width:16px;height:16px;}

/* ============== MAIN ============== */
main{padding:28px 0 60px;}

/* ① Banner 轮播 */
.carousel-shell{margin-bottom:26px;}
.banner-zone{position:relative;overflow:hidden;border-radius:var(--radius-lg);box-shadow:var(--color-card-shadow);border:1px solid var(--color-card-border);background:var(--color-paper);user-select:none;}
.banner-track{display:flex;transition:transform .5s var(--ease-out);}
.banner-slide{flex:0 0 100%;position:relative;height:clamp(280px,40vw,460px);overflow:hidden;}
.banner-slide::before{content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,0.07);z-index:1;pointer-events:none;}
.banner-slide::after{content:"";position:absolute;right:8%;bottom:-60px;width:180px;height:180px;border-radius:50%;background:rgba(255,255,255,0.05);z-index:1;pointer-events:none;}
.banner-visual{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.08);transition:transform 8s var(--ease-out);}
.banner-slide.active .banner-visual{transform:scale(1.18);}
.banner-shade{position:absolute;inset:0;background:linear-gradient(105deg,#000000b3 0%,#00000080 38%,#00000033 72%,#00000055 100%);}
.banner-content{position:relative;height:100%;display:flex;flex-direction:column;justify-content:center;padding:0 7%;color:#fff;z-index:2;}
.banner-tag{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:16px;background:#ffffff26;border:1px solid #ffffff44;font-size:13px;font-weight:500;backdrop-filter:blur(8px);width:fit-content;margin-bottom:16px;}
.banner-title{font-size:clamp(26px,4.2vw,46px);font-weight:800;letter-spacing:.5px;line-height:1.15;margin-bottom:12px;text-shadow:0 2px 18px #00000080;}
.banner-desc{font-size:clamp(14px,1.5vw,17px);opacity:.94;max-width:560px;line-height:1.65;}
.banner-cta{margin-top:18px;display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:24px;background:#fff;color:#121a22;font-weight:600;font-size:13px;width:fit-content;transition:all .28s var(--ease-out);}
.banner-cta:hover{transform:translateY(-2px);box-shadow:0 8px 20px #00000044;}
.banner-cta svg{width:14px;height:14px;}

.banner-sheen{position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,#ffffff22 50%,transparent 70%);transform:translateX(-100%);pointer-events:none;}
.banner-slide.active .banner-sheen{animation:sheen 4s var(--ease-out) infinite;}
@keyframes sheen{0%{transform:translateX(-100%);}60%,100%{transform:translateX(100%);}}

.banner-dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:3;}
.banner-dots button{width:8px;height:8px;border-radius:50%;background:#ffffff55;transition:all .3s var(--ease-out);}
.banner-dots button.active{width:24px;border-radius:4px;background:#fff;}

.banner-arrow{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;border-radius:50%;background:#ffffff33;backdrop-filter:blur(8px);border:1px solid #ffffff55;color:#fff;display:flex;align-items:center;justify-content:center;z-index:3;opacity:0;transition:all .3s var(--ease-out);}
.banner-zone:hover .banner-arrow{opacity:1;}
.banner-arrow:hover{background:#ffffff55;}
.banner-arrow.prev{left:16px;}
.banner-arrow.next{right:16px;}
.banner-arrow svg{width:18px;height:18px;}

/* ② 公告 */
.notice-summary{
  display:flex;align-items:center;gap:14px;
  background:var(--color-surface);border:1px solid var(--color-card-border);
  border-radius:var(--radius-md);padding:12px 18px;margin-bottom:24px;
  box-shadow:var(--color-card-shadow);
}
.notice-icon{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--color-accent-warm);font-weight:600;flex-shrink:0;padding-right:14px;border-right:1px solid var(--color-line);}
.notice-icon svg{width:16px;height:16px;animation:wiggle 2s ease-in-out infinite;}
@keyframes wiggle{0%,100%{transform:rotate(0);}25%{transform:rotate(-8deg);}75%{transform:rotate(8deg);}}
.notice-viewport{flex:1;height:22px;overflow:hidden;position:relative;}
.notice-track{position:absolute;left:0;right:0;top:0;transition:transform .5s var(--ease-out);}
.notice-item{height:22px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--color-ink-mid);}
.notice-item .n-date{color:var(--color-ink-soft);font-size:12px;}
.notice-item .n-tag{padding:1px 8px;border-radius:10px;font-size:11px;background:var(--color-surface-soft);color:var(--color-accent-strong);font-weight:500;}

/* ③ 分类导航 */
.category-quick-switch{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px;}
.cat-card{
  display:flex;align-items:center;gap:14px;
  padding:18px 20px;border-radius:var(--radius-md);
  background:var(--color-surface);border:1px solid var(--color-card-border);
  box-shadow:var(--color-card-shadow);
  transition:all .36s var(--ease-out);
  cursor:pointer;position:relative;overflow:hidden;
}
.cat-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--cat-color);opacity:.85;transition:width .36s var(--ease-out);z-index:1;}
.cat-card::after{content:"";position:absolute;inset:0;background:var(--cat-grad);opacity:0;transition:opacity .36s var(--ease-out);z-index:0;pointer-events:none;}
.cat-card:hover::after{opacity:.09;}
.cat-card:hover::before{width:6px;}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--color-float-shadow);}
.cat-icon{width:48px;height:48px;border-radius:14px;background:var(--cat-grad);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0;box-shadow:0 6px 16px #00000026;position:relative;z-index:1;}
.cat-icon svg{width:24px;height:24px;}
.cat-info{display:flex;flex-direction:column;line-height:1.3;position:relative;z-index:1;}
.cat-info b{font-size:16px;font-weight:700;}
.cat-info small{font-size:12px;color:var(--color-ink-soft);}
.cat-arrow{margin-left:auto;color:var(--color-ink-faint);transition:transform .3s var(--ease-out);position:relative;z-index:1;}
.cat-card:hover .cat-arrow{transform:translateX(4px);color:var(--color-ink-mid);}
.cat-arrow svg{width:16px;height:16px;}

/* ④ Feed 资源列表 */
.feed-shell{}
.feed-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;flex-wrap:wrap;gap:12px;}
.feed-title{display:flex;align-items:center;gap:10px;}
.feed-title h2{font-size:20px;font-weight:700;letter-spacing:.3px;}
.feed-title .accent-line{width:4px;height:20px;border-radius:2px;background:linear-gradient(180deg,var(--color-accent-warm),var(--color-accent-strong));}
.feed-title small{font-size:13px;color:var(--color-ink-soft);}
.feed-tools{display:flex;align-items:center;gap:8px;}
.feed-sort{display:flex;background:var(--color-surface);border:1px solid var(--color-card-border);border-radius:10px;padding:3px;}
.feed-sort button{padding:6px 12px;border-radius:7px;font-size:12px;color:var(--color-ink-soft);transition:all .24s var(--ease-out);}
.feed-sort button.active{background:var(--color-surface-strong);color:var(--color-ink-strong);box-shadow:0 2px 6px #121a221a;}

.feed-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px;}
.feed-card{
  background:var(--color-surface);border:1px solid var(--color-card-border);
  border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--color-card-shadow);
  transition:all .4s var(--ease-out);
  cursor:pointer;display:flex;flex-direction:column;
  animation:cardIn .5s var(--ease-out) both;
}
@keyframes cardIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}
.feed-card:hover{transform:translateY(-4px);box-shadow:var(--color-float-shadow);border-color:var(--color-line-strong);}

.card-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--color-paper);}
.card-thumb.with-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,#00000022);}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease-out);}
.feed-card:hover .card-thumb img{transform:scale(1.06);}
.card-thumb-tone{position:absolute;inset:0;opacity:.18;mix-blend-mode:multiply;}
.tone-ai .card-thumb-tone{background:linear-gradient(135deg,var(--tone-ai-1),var(--tone-ai-2));}
.tone-tools .card-thumb-tone{background:linear-gradient(135deg,var(--tone-tools-1),var(--tone-tools-2));}
.tone-business .card-thumb-tone{background:linear-gradient(135deg,var(--tone-business-1),var(--tone-business-2));}
.tone-materials .card-thumb-tone{background:linear-gradient(135deg,var(--tone-materials-1),var(--tone-materials-2));}

.card-type-badge{position:absolute;top:10px;left:10px;padding:4px 10px;border-radius:12px;background:#ffffffdd;backdrop-filter:blur(8px);font-size:11px;font-weight:600;color:var(--color-ink-strong);z-index:2;}
.card-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1;}
.title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;}
.title-row h3{font-size:15px;font-weight:600;line-height:1.4;flex:1;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.date-text{font-size:11px;color:var(--color-ink-soft);flex-shrink:0;padding-top:2px;}
.summary{font-size:13px;color:var(--color-ink-mid);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1;}
.tag-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px;}
.tag-chip{padding:3px 10px;border-radius:10px;font-size:11px;font-weight:500;line-height:1.4;}
.tag-chip--orange{background:var(--chip-orange-bg);color:var(--chip-orange-ink);}
.tag-chip--blue{background:var(--chip-blue-bg);color:var(--chip-blue-ink);}
.tag-chip--mint{background:var(--chip-mint-bg);color:var(--chip-mint-ink);}
.tag-chip--gold{background:var(--chip-gold-bg);color:var(--chip-gold-ink);}
.tag-chip--violet{background:var(--chip-violet-bg);color:var(--chip-violet-ink);}

/* 分页 */
.feed-pagination{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:32px;flex-wrap:wrap;}
.page-btn{min-width:38px;height:38px;padding:0 12px;border-radius:10px;background:var(--color-surface);border:1px solid var(--color-card-border);color:var(--color-ink-mid);font-size:13px;font-weight:500;transition:all .24s var(--ease-out);display:flex;align-items:center;justify-content:center;}
.page-btn:hover:not(:disabled){border-color:var(--color-accent-strong);color:var(--color-accent-strong);transform:translateY(-1px);}
.page-btn.active{background:linear-gradient(135deg,var(--color-accent-strong),var(--color-accent-cool));color:#fff;border-color:transparent;box-shadow:0 6px 14px #0f5d8f33;}
.page-btn:disabled{opacity:.4;cursor:not-allowed;}
.page-btn svg{width:14px;height:14px;}
.page-ellipsis{padding:0 6px;color:var(--color-ink-soft);}
.page-jump{display:flex;align-items:center;gap:6px;margin-left:8px;font-size:12px;color:var(--color-ink-soft);}
.page-jump-input{width:54px;height:34px;padding:0 8px;border-radius:8px;background:var(--color-surface);border:1px solid var(--color-card-border);outline:none;text-align:center;font-size:13px;}
.page-jump-input:focus{border-color:var(--color-accent-strong);}
.page-mobile{display:none;font-size:14px;color:var(--color-ink-mid);font-weight:500;}

/* ⑤ 品牌信息 */
.about-brand{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:48px;}
.about-card{padding:22px 18px;border-radius:var(--radius-md);background:var(--color-surface);border:1px solid var(--color-card-border);box-shadow:var(--color-card-shadow);text-align:center;transition:all .36s var(--ease-out);cursor:pointer;}
.about-card:hover{transform:translateY(-3px);box-shadow:var(--color-float-shadow);}
.about-icon{width:46px;height:46px;border-radius:14px;background:var(--color-surface-soft);border:1px solid var(--color-line);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;color:var(--color-accent-strong);transition:all .3s var(--ease-out);}
.about-card:hover .about-icon{background:linear-gradient(135deg,var(--color-accent-warm),var(--color-accent-strong));color:#fff;transform:rotate(-6deg) scale(1.05);}
.about-icon svg{width:22px;height:22px;}
.about-card h4{font-size:14px;font-weight:600;margin-bottom:4px;}
.about-card p{font-size:12px;color:var(--color-ink-soft);}

/* ============== Footer ============== */
.site-footer{padding:30px 0 40px;border-top:1px solid var(--color-line);text-align:center;color:var(--color-ink-soft);font-size:12px;line-height:1.8;}
.site-footer .brand{justify-content:center;margin-bottom:10px;}
.site-footer a{color:var(--color-accent-strong);}

/* ============== Modal ============== */
.modal-mask{position:fixed;inset:0;background:#00000066;backdrop-filter:blur(14px);display:flex;align-items:center;justify-content:center;z-index:80;opacity:0;pointer-events:none;transition:opacity .3s var(--ease-out);padding:20px;}
.modal-mask.open{opacity:1;pointer-events:auto;}
.modal-card{background:var(--color-surface-strong);backdrop-filter:blur(20px);border:1px solid var(--color-card-border);border-radius:var(--radius-lg);box-shadow:var(--color-float-shadow);max-width:520px;width:100%;max-height:88vh;overflow-y:auto;transform:scale(.92) translateY(20px);opacity:0;transition:all .4s var(--ease-out);}
.modal-mask.open .modal-card{transform:scale(1) translateY(0);opacity:1;}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--color-line);position:sticky;top:0;background:var(--color-surface-strong);backdrop-filter:blur(20px);z-index:2;}
.modal-head h3{font-size:17px;font-weight:700;}
.modal-close{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--color-ink-soft);transition:all .24s var(--ease-out);}
.modal-close:hover{background:var(--color-surface-soft);color:var(--color-ink-strong);transform:rotate(90deg);}
.modal-close svg{width:16px;height:16px;}
.modal-body{padding:24px;}
.modal-body .detail-cover{width:100%;aspect-ratio:16/9;border-radius:12px;object-fit:cover;margin-bottom:18px;background:var(--color-paper);}
.modal-body .detail-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.modal-body .detail-desc{color:var(--color-ink-mid);line-height:1.8;font-size:14px;margin-bottom:18px;}
.modal-body .detail-link{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:24px;background:linear-gradient(135deg,var(--color-accent-strong),var(--color-accent-cool));color:#fff;font-weight:600;font-size:13px;transition:all .28s var(--ease-out);}
.modal-body .detail-link:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0f5d8f44;}
.modal-body .detail-link svg{width:14px;height:14px;}

/* ============== Toast ============== */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--color-ink-strong);color:var(--color-paper);padding:10px 20px;border-radius:24px;font-size:13px;z-index:90;opacity:0;pointer-events:none;transition:all .3s var(--ease-out);box-shadow:var(--color-float-shadow);}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ============== 响应式 ============== */
@media (max-width: 980px){
  .category-quick-switch{grid-template-columns:repeat(2,1fr);}
  .about-brand{grid-template-columns:repeat(2,1fr);}
}
@media (max-width: 820px){
  .desktop-shell{display:none;}
  .mobile-shell{display:flex;}
  .search-trigger{display:none;}
  .banner-arrow{display:none;}
  .feed-head{flex-direction:column;align-items:flex-start;}
  .page-jump{display:none;}
}
@media (max-width: 560px){
  .shell{padding:0 14px;}
  .category-quick-switch{grid-template-columns:1fr;}
  .about-brand{grid-template-columns:repeat(2,1fr);}
  .feed-grid{grid-template-columns:1fr;}
  .feed-pagination .page-desktop{display:none;}
  .page-mobile{display:block;}
  .banner-slide{height:240px;}
  .banner-content{padding:0 6%;}
  .banner-desc{display:none;}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;}
}


/* ===================================================================
   以下为博客专属补充样式（文章详情页 / 列表·分类·标签·归档页）
   设计语言完全沿用 bu31 原版变量与质感
   =================================================================== */

/* feed-card 在博客里是 <a> 跳转卡片，去掉下划线/继承文字色 */
a.feed-card{ text-decoration:none; color:inherit; display:block; }

/* ============== 文章详情页 ============== */
.bu31-article{
  max-width: 780px;
  margin: 26px auto 0;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--color-card-shadow);
  overflow: hidden;
}
.post-cover{
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  display: block;
  background: var(--color-surface-soft);
}
.post-head{ padding: 30px 34px 4px; }
.post-title{
  font-size: 30px; line-height: 1.3; margin: 0 0 14px;
  color: var(--color-ink-strong); font-weight: 800; letter-spacing: -.01em;
}
.post-meta{
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  color: var(--color-ink-soft); font-size: 14px;
}
.post-meta a{ color: var(--color-accent-strong); text-decoration: none; }
.post-meta a:hover{ text-decoration: underline; }
.meta-sep{ color: var(--color-ink-faint); }
.post-tags{ margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.post-content{
  padding: 18px 34px 8px;
  color: var(--color-ink-mid); line-height: 1.95; font-size: 16px;
}
.post-content > :first-child{ margin-top: 8px; }
.post-content img{ max-width: 100%; height: auto; border-radius: var(--radius-md); margin: 16px 0; display:block; }
.post-content h2{ font-size: 22px; color: var(--color-ink-strong); margin: 30px 0 12px; font-weight: 800; }
.post-content h3{ font-size: 18px; color: var(--color-ink-strong); margin: 24px 0 10px; font-weight: 800; }
.post-content a{ color: var(--color-accent-strong); text-decoration: underline; text-underline-offset: 3px; }
.post-content ul,.post-content ol{ padding-left: 1.4em; margin: 12px 0; }
.post-content li{ margin: 6px 0; }
.post-content blockquote{
  border-left: 3px solid var(--color-accent-warm);
  background: var(--color-surface-soft);
  padding: 10px 16px; margin: 16px 0;
  color: var(--color-ink-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.post-content pre{
  background: #0f172a; color: #e2e8f0; padding: 16px 18px;
  border-radius: var(--radius-md); overflow: auto; font-size: 14px; line-height: 1.6;
}
.post-content code{ background: var(--color-surface-soft); padding: 2px 6px; border-radius: 6px; font-size: 14px; }
.post-content pre code{ background: none; padding: 0; }
.post-content table{ width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px; }
.post-content th,.post-content td{ border: 1px solid var(--color-card-border); padding: 9px 12px; text-align: left; }
.post-content th{ background: var(--color-surface-soft); color: var(--color-ink-strong); }
.post-nav{
  display: flex; gap: 16px; padding: 22px 34px 34px;
  border-top: 1px solid var(--color-card-border); margin-top: 26px;
}
.post-nav a{
  flex: 1; text-decoration: none; color: var(--color-ink-mid);
  background: var(--color-surface-soft); border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md); padding: 14px 16px; transition: .2s;
}
.post-nav a:hover{ border-color: var(--color-accent-strong); transform: translateY(-2px); color: var(--color-ink-strong); }
.nav-label{ font-size: 13px; color: var(--color-ink-soft); }
.nav-title{ font-weight: 700; color: var(--color-ink-strong); margin-top: 4px; }

/* 代码块外壳（JS 包裹：语言标签 + 复制按钮，duwu 风格） */
.bu31-code{ margin:16px 0; border-radius:var(--radius-md); overflow:hidden; border:1px solid #1f2733; background:#0d1117; }
.bu31-code-bar{ display:flex; align-items:center; justify-content:space-between; padding:7px 12px; background:#161b22; border-bottom:1px solid #21262d; }
.bu31-code-lang{ font-size:12px; color:#8b949e; font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; letter-spacing:.02em; }
.bu31-code-copy{ font-size:12px; color:#8b949e; background:transparent; border:1px solid #30363d; border-radius:6px; padding:3px 10px; cursor:pointer; transition:.15s; }
.bu31-code-copy:hover{ color:#e6edf3; border-color:#8b949e; }
.bu31-code-copy.ok{ color:#3fb950; border-color:#3fb950; }
.bu31-code pre{ margin:0; border:none; border-radius:0; background:transparent; max-height:520px; overflow:auto; }
.bu31-code pre code{ display:block; padding:14px 16px; }

/* 文章页双栏布局 + 侧边栏 */
.bu31-single-layout{ display:flex; gap:28px; align-items:flex-start; max-width:var(--layout-width); margin:0 auto; padding:0 18px; }
.bu31-single-layout .bu31-article{ flex:1; min-width:0; max-width:none; margin:26px 0 0; }
.bu31-sidebar{
  flex:0 0 312px; width:312px; margin-top:26px; align-self:flex-start;
  position:sticky; top:88px; max-height:calc(100vh - 104px); overflow-y:auto;
  display:flex; flex-direction:column; gap:18px; scrollbar-width:thin;
}
.bu31-sidebar::-webkit-scrollbar{ width:6px; }
.bu31-sidebar::-webkit-scrollbar-thumb{ background:var(--color-line-strong); border-radius:3px; }

.bu31-widget{ background:var(--color-surface); border:1px solid var(--color-card-border); border-radius:var(--radius-lg); box-shadow:var(--color-card-shadow); padding:14px 16px 16px; }
.bu31-widget-title{ display:flex; align-items:center; gap:8px; font-size:15px; font-weight:800; color:var(--color-ink-strong); margin:0 0 10px; }
.bu31-widget-bar{ width:4px; height:15px; border-radius:3px; background:var(--color-accent-strong); }

/* 文章目录 TOC（滚动高亮） */
.bu31-toc{ display:flex; flex-direction:column; gap:1px; }
.bu31-toc-link{ font-size:13.5px; line-height:1.5; color:var(--color-ink-soft); text-decoration:none; padding:5px 10px; border-radius:7px; border-left:2px solid transparent; transition:.15s; }
.bu31-toc-link.lvl-3{ padding-left:22px; font-size:13px; }
.bu31-toc-link:hover{ color:var(--color-ink-strong); background:var(--color-surface-soft); }
.bu31-toc-link.active{ color:var(--color-accent-strong); border-left-color:var(--color-accent-strong); background:var(--color-surface-soft); font-weight:700; }
.bu31-toc-empty{ font-size:13px; color:var(--color-ink-faint); padding:4px 10px; }

/* 最新文章 */
.bu31-recent{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; }
.bu31-recent li{ display:flex; align-items:baseline; gap:8px; padding:7px 4px; border-bottom:1px dashed var(--color-card-border); }
.bu31-recent li:last-child{ border-bottom:none; }
.bu31-recent a{ flex:1; min-width:0; color:var(--color-ink-mid); text-decoration:none; font-size:14px; line-height:1.45; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.bu31-recent a:hover{ color:var(--color-accent-strong); }
.bu31-recent span{ color:var(--color-ink-faint); font-size:12px; flex:0 0 auto; }

/* 分类目录 */
.bu31-cat-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; }
.bu31-cat-list li{ display:flex; align-items:center; justify-content:space-between; padding:6px 4px; border-bottom:1px dashed var(--color-card-border); }
.bu31-cat-list li:last-child{ border-bottom:none; }
.bu31-cat-list a{ color:var(--color-ink-mid); text-decoration:none; font-size:14px; }
.bu31-cat-list a:hover{ color:var(--color-accent-strong); }
.bu31-count{ background:var(--color-surface-soft); color:var(--color-ink-soft); border-radius:999px; padding:1px 9px; font-size:12px; }

/* 标签云 */
.bu31-tag-cloud{ display:flex; flex-wrap:wrap; gap:8px; }
.bu31-tag-cloud a{ text-decoration:none; color:var(--color-ink-mid); background:var(--color-surface-soft); border:1px solid var(--color-card-border); border-radius:999px; padding:5px 12px; font-size:13px; transition:.15s; }
.bu31-tag-cloud a:hover{ color:var(--color-accent-strong); border-color:var(--color-accent-strong); }
.bu31-tag-cloud b{ color:var(--color-accent-warm); margin-left:4px; font-size:11px; }

/* 标题锚点滚动偏移（避免被 sticky 头部遮挡） */
.post-content h2, .post-content h3{ scroll-margin-top:92px; }

@media (max-width: 980px){
  .bu31-single-layout{ flex-direction:column; gap:0; }
  .bu31-single-layout .bu31-article{ margin-top:22px; }
  .bu31-sidebar{ width:100%; flex-basis:auto; position:static; max-height:none; overflow:visible; margin-top:22px; }
}

/* ============== 列表 / 分类 / 标签 / 归档 页 ============== */
.bu31-list-head{ margin: 28px 0 16px; }
.bu31-list-head h1{
  font-size: 26px; color: var(--color-ink-strong); font-weight: 800;
  display: flex; align-items: center; gap: 10px; margin: 0;
}
.bu31-list-head p{ color: var(--color-ink-soft); margin: 8px 0 0; padding-left: 18px; font-size: 14px; }
.terms-cloud{ display: flex; flex-wrap: wrap; gap: 10px; margin: 4px 0 24px; padding-left: 18px; }
.terms-cloud a{
  text-decoration: none; color: var(--color-ink-mid);
  background: var(--color-surface); border: 1px solid var(--color-card-border);
  border-radius: 999px; padding: 8px 16px; font-size: 14px; transition: .2s;
}
.terms-cloud a:hover{ border-color: var(--color-accent-strong); color: var(--color-accent-strong); }
.terms-cloud b{ color: var(--color-accent-warm); margin-left: 5px; }

/* ============== 暗色模式补充 ============== */
[data-theme="dark"] .bu31-article{ background: var(--color-surface); }
[data-theme="dark"] .post-nav a,
[data-theme="dark"] .terms-cloud a{ background: var(--color-surface); }
[data-theme="dark"] .post-content th{ background: var(--color-surface-soft); }