/* ============================================================
   小新智赋 · 设计系统
   风格：Academic Calm（学术宁静）— 淡蓝水洗 + 玻璃拟态悬浮导航
   ============================================================ */

:root{
  --blue-50:#eff6ff; --blue-100:#dbeafe; --blue-200:#bfdbfe; --blue-300:#93c5fd;
  --blue-400:#60a5fa; --blue-500:#3b82f6; --blue-600:#2563eb; --blue-700:#1d4ed8;
  --indigo-500:#6366f1; --indigo-600:#4f46e5;
  --amber-50:#fffbeb; --amber-100:#fef3c7; --amber-400:#fbbf24; --amber-500:#f59e0b; --amber-600:#d97706;
  --green-50:#f0fdf4; --green-500:#22c55e; --green-600:#16a34a;
  --red-50:#fef2f2; --red-500:#ef4444; --red-600:#dc2626;
  --gray-50:#f9fafb; --gray-100:#f3f4f6; --gray-200:#e5e7eb; --gray-300:#d1d5db;
  --gray-400:#9ca3af; --gray-500:#6b7280; --gray-600:#4b5563; --gray-700:#374151;
  --gray-800:#1f2937; --gray-900:#111827;

  --font-serif:'Noto Serif SC','Songti SC',Georgia,serif;
  --font-sans:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;

  --wash:#f2f7ff;
  --ink:#17203a;
  --ink-soft:#46506a;
  --muted:#7b8599;
  --line:#e4eaf4;
  --card:#ffffff;
  --glass:rgba(255,255,255,.58);
  --glass-strong:rgba(255,255,255,.78);
  --glass-line:rgba(214,226,246,.85);

  --shadow-xs:0 1px 2px rgba(16,32,64,.05);
  --shadow-sm:0 2px 8px rgba(24,48,96,.06);
  --shadow-md:0 8px 22px rgba(24,48,96,.08);
  --shadow-lg:0 18px 44px rgba(24,48,96,.12);
  --shadow-xl:0 28px 70px rgba(24,48,96,.16);

  --radius-sm:8px; --radius:12px; --radius-lg:16px; --radius-xl:22px;
  --header-h:64px; --header-top:14px; --page-w:1480px;
  --ease:.25s cubic-bezier(.4,0,.2,1);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--gray-800);
  line-height:1.65;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(191,219,254,.75) 0%, rgba(191,219,254,0) 62%),
    radial-gradient(900px 520px at 8% 4%, rgba(224,231,255,.7) 0%, rgba(224,231,255,0) 58%),
    radial-gradient(760px 460px at 92% 42%, rgba(224,242,254,.65) 0%, rgba(224,242,254,0) 60%),
    var(--wash);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:14px;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
::selection{background:var(--blue-200)}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#cbd7ea;border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#aebfd8}

/* ---------- 通用 ---------- */
.page-wrap{max-width:var(--page-w);margin:0 auto;padding:0 32px}
.hidden{display:none !important}
.center{text-align:center}
.serif{font-family:var(--font-serif)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:12px;font-size:14px;font-weight:600;
  background:#fff;border:1px solid var(--line);color:var(--ink);
  transition:all var(--ease);white-space:nowrap;
}
.btn:hover{border-color:var(--blue-300);color:var(--blue-600);box-shadow:var(--shadow-sm);transform:translateY(-1px)}
.btn-primary{
  background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));
  color:#fff;border-color:transparent;box-shadow:0 10px 24px rgba(59,130,246,.28);
}
.btn-primary:hover{color:#fff;box-shadow:0 14px 30px rgba(59,130,246,.36)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--ink-soft)}
.btn-ghost:hover{background:var(--blue-50);color:var(--blue-600);box-shadow:none}
.btn-sm{height:34px;padding:0 14px;font-size:13px;border-radius:10px}
.btn-lg{height:50px;padding:0 30px;font-size:15px;border-radius:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none !important;box-shadow:none !important}

.badge{
  display:inline-flex;align-items:center;gap:4px;height:22px;padding:0 9px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--blue-50);color:var(--blue-600);
}
.badge-amber{background:var(--amber-50);color:var(--amber-600)}
.badge-green{background:var(--green-50);color:var(--green-600)}
.badge-gray{background:var(--gray-100);color:var(--gray-600)}
.badge-red{background:var(--red-50);color:var(--red-600)}

.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-soft);margin-bottom:7px}
.field .hint{font-size:12px;color:var(--muted);margin-top:6px}
.input,.select,.textarea{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:12px;
  background:#fff;outline:none;transition:all var(--ease);
}
.textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.input:focus,.select:focus,.textarea:focus{border-color:var(--blue-400);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.select{appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path fill='%237b8599' d='M6 8.5L1.5 4h9z'/></svg>");background-repeat:no-repeat;background-position:right 14px center;padding-right:34px}

.section-head{text-align:center;margin-bottom:38px}
.section-head .eyebrow{font-size:12px;letter-spacing:2.4px;text-transform:uppercase;color:var(--blue-500);font-weight:700}
.section-head h2{font-family:var(--font-serif);font-size:34px;letter-spacing:2px;color:var(--ink);margin-top:8px}
.section-head p{color:var(--muted);margin-top:10px;font-size:15px}

/* ---------- 顶部悬浮导航 ---------- */
.site-header{
  position:fixed;top:var(--header-top);left:50%;transform:translateX(-50%);
  z-index:900;height:var(--header-h);width:min(var(--page-w),calc(100% - 64px));
  background:var(--glass);backdrop-filter:blur(26px) saturate(180%);
  -webkit-backdrop-filter:blur(26px) saturate(180%);
  border:1px solid rgba(255,255,255,.7);border-radius:var(--radius-xl);
  box-shadow:0 6px 26px rgba(40,114,240,.10), inset 0 1px 0 rgba(255,255,255,.8);
  transition:background var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.site-header.scrolled{
  background:var(--glass-strong);border-color:var(--glass-line);
  box-shadow:0 14px 34px rgba(26,34,56,.13), inset 0 1px 0 rgba(255,255,255,.85);
}
.header-inner{height:100%;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:20px;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;justify-self:start;min-width:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex:none;
  background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));
  color:#fff;font-weight:700;font-size:13px;letter-spacing:.5px;
  box-shadow:0 6px 16px rgba(59,130,246,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-text b{font-family:var(--font-serif);font-size:18px;letter-spacing:2px;color:var(--ink);white-space:nowrap}
.brand-text span{font-size:10px;color:var(--muted);letter-spacing:1.4px;white-space:nowrap}

.nav{display:flex;align-items:center;gap:4px;justify-self:center}
.nav a{
  display:inline-flex;align-items:center;gap:7px;height:38px;padding:0 16px;border-radius:11px;
  font-size:14px;color:var(--ink-soft);font-weight:500;transition:all var(--ease);white-space:nowrap;
}
.nav a:hover{background:rgba(255,255,255,.75);color:var(--blue-600)}
.nav a.active{background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));color:#fff;box-shadow:0 8px 20px rgba(59,130,246,.28)}
.nav a .ico{font-size:15px}

.header-actions{display:flex;align-items:center;gap:10px;justify-self:end}
.user-chip{display:flex;align-items:center;gap:8px;height:38px;padding:0 12px 0 6px;border-radius:999px;background:rgba(255,255,255,.7);border:1px solid var(--line);transition:all var(--ease)}
.user-chip:hover{border-color:var(--blue-300);box-shadow:var(--shadow-sm)}
.avatar{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));flex:none}
.avatar-lg{width:52px;height:52px;font-size:20px}
.avatar-sm{width:24px;height:24px;font-size:11px}
.points-badge{display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 12px;border-radius:999px;background:linear-gradient(135deg,var(--amber-100),#fde68a);color:#92400e;font-size:13px;font-weight:700;border:1px solid rgba(251,191,36,.5);transition:all var(--ease)}
.points-badge:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(245,158,11,.22)}
.header-toggle{display:none;width:38px;height:38px;border-radius:11px;background:rgba(255,255,255,.7);border:1px solid var(--line);font-size:16px}

/* ---------- 首页 Hero ---------- */
.hero{padding:calc(var(--header-h) + var(--header-top) + 54px) 0 20px}
.hero-title{text-align:center}
.hero-title .kicker{font-size:13px;letter-spacing:3px;color:var(--blue-500);font-weight:700}
.hero-title h1{font-family:var(--font-serif);font-size:46px;line-height:1.28;letter-spacing:3px;color:var(--ink);margin-top:14px}
.hero-title h1 em{font-style:normal;background:linear-gradient(135deg,var(--blue-600),var(--indigo-500));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-title .lead{font-size:15px;color:var(--muted);margin-top:14px;letter-spacing:1px}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:26px;flex-wrap:wrap}

/* ---------- 小新助手 ---------- */
.assistant{
  margin:34px auto 0;max-width:1180px;background:var(--glass-strong);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.8);border-radius:24px;overflow:hidden;
  box-shadow:var(--shadow-lg);display:grid;grid-template-columns:400px minmax(0,1fr);min-height:430px;
}
.assistant-chat{display:flex;flex-direction:column;border-right:1px solid var(--line);background:rgba(255,255,255,.72)}
.assistant-head{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line)}
.assistant-head .spark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-size:18px;background:linear-gradient(135deg,var(--blue-100),#e0e7ff);flex:none}
.assistant-head b{font-size:15px;color:var(--ink);display:block;line-height:1.2}
.assistant-head small{font-size:11.5px;color:var(--muted)}
.assistant-head .tools{margin-left:auto;display:flex;gap:6px}
.icon-btn{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;font-size:14px;color:var(--ink-soft);border:1px solid transparent;transition:all var(--ease)}
.icon-btn:hover{background:#fff;border-color:var(--line);color:var(--blue-600)}
.assistant-body{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:14px;max-height:400px}
.msg{max-width:88%;font-size:13.5px;line-height:1.78;padding:11px 14px;border-radius:14px;white-space:pre-wrap;word-break:break-word}
.msg-bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;color:var(--ink-soft)}
.msg-me{align-self:flex-end;background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));color:#fff;border-bottom-right-radius:4px}
.assistant-tags{display:flex;gap:8px;padding:0 18px 12px;flex-wrap:wrap}
.tag-chip{height:28px;padding:0 12px;border-radius:999px;font-size:12.5px;background:#fff;border:1px solid var(--line);color:var(--ink-soft);transition:all var(--ease)}
.tag-chip:hover{border-color:var(--blue-300);color:var(--blue-600)}
.assistant-input{display:flex;gap:10px;padding:14px 16px;border-top:1px solid var(--line);background:rgba(255,255,255,.8)}
.assistant-input textarea{flex:1;min-height:44px;max-height:110px;padding:11px 14px;border:1px solid var(--line);border-radius:12px;resize:none;outline:none;font-size:13.5px;line-height:1.6}
.assistant-input textarea:focus{border-color:var(--blue-400);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.send-btn{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));color:#fff;font-size:17px;flex:none;box-shadow:0 8px 20px rgba(59,130,246,.3)}
.assistant-preview{background:#fbfdff;display:flex;flex-direction:column;min-height:360px}
.preview-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);font-size:12.5px;color:var(--muted)}
.dot{width:9px;height:9px;border-radius:50%}
.dot-r{background:#ff5f57} .dot-y{background:#febc2e} .dot-g{background:#28c840}
.preview-bar .title{margin-left:6px;font-weight:600;color:var(--ink-soft)}
.preview-bar .spacer{margin-left:auto;display:flex;gap:8px}
.preview-stage{flex:1;display:grid;place-items:center;padding:20px;position:relative;overflow:hidden}
.preview-stage iframe{width:100%;height:100%;border:0;border-radius:12px;background:#fff;min-height:320px}
.preview-empty{text-align:center;color:var(--muted);padding:40px 24px}
.preview-empty .orb{
  width:96px;height:96px;margin:0 auto 18px;border-radius:50%;
  background:radial-gradient(circle at 34% 30%, #ffffff 0%, #dbeafe 42%, #93c5fd 100%);
  box-shadow:0 20px 50px rgba(59,130,246,.28), inset 0 -10px 24px rgba(37,99,235,.18);
  animation:float 5.5s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.preview-empty b{display:block;font-size:15px;color:var(--ink-soft);margin-bottom:6px}
.preview-empty p{font-size:13px;line-height:1.9}

/* ---------- 统计条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:44px auto 0;max-width:1180px}
.stat{background:var(--glass-strong);border:1px solid rgba(255,255,255,.8);border-radius:18px;padding:22px 18px;text-align:center;box-shadow:var(--shadow-sm);transition:all var(--ease)}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.stat b{display:block;font-family:var(--font-serif);font-size:30px;letter-spacing:1px;background:linear-gradient(135deg,var(--blue-600),var(--indigo-500));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13px;color:var(--muted);margin-top:4px;display:block}

/* ---------- 公告 ---------- */
.notice{display:flex;gap:12px;align-items:flex-start;max-width:1180px;margin:26px auto 0;padding:15px 20px;border-radius:16px;background:linear-gradient(135deg,rgba(255,251,235,.95),rgba(254,243,199,.75));border:1px solid rgba(251,191,36,.4);box-shadow:var(--shadow-xs)}
.notice .ico{font-size:17px;flex:none}
.notice b{font-size:13.5px;color:#92400e;display:block;margin-bottom:3px}
.notice p{font-size:13px;color:#a16207;line-height:1.8}
.notice .close{margin-left:auto;color:#b45309;font-size:16px;flex:none;opacity:.7}
.notice .close:hover{opacity:1}

/* ---------- 学科浏览 ---------- */
.subject-grid{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:1120px;margin:0 auto}
.subject-chip{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;
  background:rgba(255,255,255,.85);border:1px solid var(--line);font-size:14px;color:var(--ink-soft);
  transition:all var(--ease);box-shadow:var(--shadow-xs);
}
.subject-chip:hover{border-color:var(--blue-300);color:var(--blue-600);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.subject-chip.active{background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));color:#fff;border-color:transparent;box-shadow:0 10px 24px rgba(59,130,246,.28)}
.subject-chip .ico{font-size:16px}
.subject-chip .cnt{font-size:11.5px;opacity:.6}

/* ---------- 程序卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(292px,1fr));gap:24px}
.pcard{
  position:relative;
  background:var(--card);border:1px solid var(--line);border-radius:18px;overflow:hidden;
  display:flex;flex-direction:column;transition:all var(--ease);box-shadow:var(--shadow-xs);cursor:pointer;
}
.pcard:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--blue-200)}
.pcard-cover{position:relative;aspect-ratio:16/10;overflow:hidden;display:grid;place-items:center;background:linear-gradient(135deg,var(--c1,#3b82f6),var(--c2,#1e40af))}
.pcard-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.pcard:hover .pcard-cover img{transform:scale(1.06)}
.pcard-cover .ph{position:absolute;inset:0;display:grid;place-items:center;font-size:52px;opacity:.35;pointer-events:none}
.pcard-badges{position:absolute;top:12px;left:12px;display:flex;gap:6px;z-index:2}
.pcard-badges .badge{background:rgba(255,255,255,.92);backdrop-filter:blur(6px);color:var(--ink-soft)}
.pcard-badges .badge.sub{color:#fff;background:rgba(15,23,42,.55)}
.pcard-play{position:absolute;bottom:12px;left:12px;z-index:2;display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;background:rgba(15,23,42,.62);color:#fff;font-size:12px;backdrop-filter:blur(6px)}
.pcard-price{position:absolute;top:12px;right:12px;z-index:2;height:26px;padding:0 11px;border-radius:999px;display:inline-flex;align-items:center;font-size:12px;font-weight:700;background:rgba(255,255,255,.94);color:var(--blue-600)}
.pcard-price.paid{background:linear-gradient(135deg,var(--amber-400),var(--amber-500));color:#7c2d12}
.pcard-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.pcard-body h3{font-size:16px;line-height:1.45;color:var(--ink);font-weight:600;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.pcard-body p{font-size:13px;color:var(--muted);line-height:1.75;margin-top:8px;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pcard-foot{display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:13px;border-top:1px dashed var(--line)}
.pcard-foot .who{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--ink-soft);min-width:0}
.pcard-foot .who span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pcard-foot .meta{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);flex:none}
.stars{color:var(--amber-400);letter-spacing:-1px;font-size:12.5px}
.score{color:var(--amber-600);font-weight:700}

/* ---------- 精品课卡片 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px}
.ccard{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:all var(--ease);box-shadow:var(--shadow-xs);display:flex;flex-direction:column}
.ccard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.ccard-cover{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,var(--c1,#3b82f6),var(--c2,#1e40af));display:grid;place-items:center;overflow:hidden}
.ccard-cover .ph{font-size:48px;opacity:.32}
.ccard-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ccard-cover .lock{position:absolute;inset:0;background:rgba(15,23,42,.42);display:grid;place-items:center;color:#fff;font-size:13px;gap:6px;flex-direction:column;backdrop-filter:blur(2px)}
.ccard-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.ccard-body h3{font-size:16px;color:var(--ink);font-weight:600}
.ccard-body p{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.75;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ccard-foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px;padding-top:13px;border-top:1px dashed var(--line)}
.price{font-family:var(--font-serif);font-size:22px;color:var(--blue-600);font-weight:700}
.price small{font-size:12px;color:var(--muted);font-weight:400;font-family:var(--font-sans)}

/* ---------- 会员套餐 ---------- */
.plan-group{margin-top:34px}
.plan-group > h3{font-size:18px;color:var(--ink);font-weight:600;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.plan-group > h3::before{content:'';width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,var(--blue-500),var(--indigo-500))}
.plan-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.plan-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;display:flex;flex-direction:column;transition:all var(--ease);box-shadow:var(--shadow-xs)}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--blue-200)}
.plan-card.featured{border-color:var(--blue-400);box-shadow:0 16px 40px rgba(59,130,246,.16)}
.plan-card.featured::after{content:'推荐';position:absolute;top:16px;right:16px;font-size:11px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));padding:3px 10px;border-radius:999px}
.plan-card h4{font-size:15.5px;color:var(--ink);font-weight:600}
.plan-card .amount{margin:14px 0 6px;display:flex;align-items:baseline;gap:6px}
.plan-card .amount b{font-family:var(--font-serif);font-size:34px;color:var(--blue-600);letter-spacing:0}
.plan-card .amount small{color:var(--muted);font-size:13px}
.plan-card .desc{font-size:12.5px;color:var(--muted);line-height:1.8;flex:1;margin-bottom:16px}
.plan-card ul{margin:0 0 18px;display:flex;flex-direction:column;gap:7px}
.plan-card ul li{font-size:12.5px;color:var(--ink-soft);display:flex;gap:7px;align-items:flex-start}
.plan-card ul li::before{content:'✓';color:var(--green-500);font-weight:700;flex:none}

/* ---------- 详情弹窗 ---------- */
.modal-mask{position:fixed;inset:0;z-index:1000;background:rgba(15,23,42,.42);backdrop-filter:blur(6px);display:grid;place-items:center;padding:28px;animation:fade .22s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{background:#fff;border-radius:22px;width:min(920px,100%);max-height:calc(100vh - 56px);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-xl);animation:pop .26s cubic-bezier(.2,.9,.3,1.1)}
@keyframes pop{from{opacity:0;transform:translateY(18px) scale(.97)}to{opacity:1;transform:none}}
.modal-sm{width:min(460px,100%)}
.modal-lg{width:min(1080px,100%)}
.modal-head{display:flex;align-items:center;gap:12px;padding:18px 22px;border-bottom:1px solid var(--line);flex:none}
.modal-head h3{font-size:17px;color:var(--ink);font-weight:600}
.modal-head .close{margin-left:auto;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-size:17px;color:var(--muted);transition:all var(--ease)}
.modal-head .close:hover{background:var(--gray-100);color:var(--ink)}
.modal-body{padding:22px;overflow-y:auto;flex:1}
.modal-foot{padding:16px 22px;border-top:1px solid var(--line);display:flex;gap:12px;justify-content:flex-end;flex:none;background:#fbfdff}

.detail{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px}
.detail-cover{border-radius:16px;overflow:hidden;aspect-ratio:16/10;background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));position:relative;display:grid;place-items:center}
.detail-cover img{width:100%;height:100%;object-fit:cover}
.detail-cover .ph{position:absolute;font-size:64px;opacity:.3}
.detail h2{font-family:var(--font-serif);font-size:26px;color:var(--ink);letter-spacing:1px;margin-bottom:10px}
.detail-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.detail-desc{font-size:14px;color:var(--ink-soft);line-height:2;white-space:pre-wrap;word-break:break-word}
.detail-side{background:#fbfdff;border:1px solid var(--line);border-radius:16px;padding:18px;height:fit-content;position:sticky;top:0}
.detail-side .row{display:flex;justify-content:space-between;font-size:13px;padding:9px 0;border-bottom:1px dashed var(--line);color:var(--muted)}
.detail-side .row:last-of-type{border-bottom:0}
.detail-side .row b{color:var(--ink);font-weight:600}
.detail-side .author{display:flex;gap:10px;align-items:center;margin-bottom:14px}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:22px}
.gallery img{border-radius:12px;border:1px solid var(--line);aspect-ratio:16/10;object-fit:cover;background:var(--gray-100);cursor:zoom-in}

/* ---------- 探索程序页 ---------- */
.browse-layout{display:grid;grid-template-columns:236px minmax(0,1fr);gap:26px;align-items:start}
.filters{position:sticky;top:calc(var(--header-h) + var(--header-top) + 20px);background:var(--glass-strong);border:1px solid rgba(255,255,255,.8);border-radius:18px;padding:18px;box-shadow:var(--shadow-sm);backdrop-filter:blur(18px);max-height:calc(100vh - 130px);overflow-y:auto}
.filter-group + .filter-group{margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}
.filter-group h4{font-size:12px;font-weight:700;letter-spacing:1.6px;color:var(--muted);text-transform:uppercase;margin-bottom:10px}
.filter-item{display:flex;align-items:center;justify-content:space-between;width:100%;height:34px;padding:0 11px;border-radius:9px;font-size:13.5px;color:var(--ink-soft);transition:all var(--ease);text-align:left}
.filter-item:hover{background:rgba(255,255,255,.9);color:var(--blue-600)}
.filter-item.active{background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));color:#fff;font-weight:600}
.filter-item .n{font-size:11.5px;opacity:.65}
.filter-reset{width:100%;margin-top:16px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:13px;color:var(--ink-soft)}
.filter-reset:hover{border-color:var(--blue-300);color:var(--blue-600)}

.browse-toolbar{display:flex;gap:12px;align-items:center;margin-bottom:20px;flex-wrap:wrap}
.search-box{position:relative;flex:1;min-width:240px}
.search-box input{width:100%;height:46px;padding:0 16px 0 44px;border-radius:14px;border:1px solid var(--line);background:#fff;outline:none;transition:all var(--ease)}
.search-box input:focus{border-color:var(--blue-400);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.search-box .ico{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:15px}
.browse-toolbar .select{width:150px;height:46px;border-radius:14px}
.result-count{font-size:13px;color:var(--muted);margin-bottom:16px}
.result-count b{color:var(--blue-600);font-size:15px;font-family:var(--font-serif)}

.pager{display:flex;gap:8px;justify-content:center;margin-top:38px;flex-wrap:wrap}
.pager button{min-width:38px;height:38px;padding:0 12px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:13.5px;color:var(--ink-soft);transition:all var(--ease)}
.pager button:hover{border-color:var(--blue-300);color:var(--blue-600)}
.pager button.active{background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));color:#fff;border-color:transparent}
.pager button[disabled]{opacity:.45;cursor:not-allowed}

.empty{padding:70px 20px;text-align:center;color:var(--muted)}
.empty .ico{font-size:44px;margin-bottom:14px;opacity:.6}
.empty b{display:block;color:var(--ink-soft);margin-bottom:6px;font-size:15px}

/* ---------- 上传作品 ---------- */
.upload-wrap{max-width:1000px;margin:0 auto}
.form-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px 30px;margin-bottom:22px;box-shadow:var(--shadow-xs)}
.form-card > h3{font-size:16px;color:var(--ink);margin-bottom:18px;font-weight:600;display:flex;align-items:center;gap:9px}
.form-card > h3 .num{width:24px;height:24px;border-radius:8px;display:grid;place-items:center;font-size:12.5px;background:var(--blue-50);color:var(--blue-600);font-weight:700}
.type-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.type-item{display:flex;flex-direction:column;align-items:center;gap:8px;padding:18px 10px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:all var(--ease)}
.type-item:hover{border-color:var(--blue-300);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.type-item.active{border-color:var(--blue-500);background:var(--blue-50);box-shadow:0 10px 24px rgba(59,130,246,.14)}
.type-item .ico{font-size:26px}
.type-item b{font-size:13.5px;color:var(--ink);font-weight:600}
.type-item small{font-size:11.5px;color:var(--muted)}

.dropzone{border:2px dashed var(--line);border-radius:16px;padding:28px 20px;text-align:center;background:#fbfdff;transition:all var(--ease);cursor:pointer}
.dropzone:hover{border-color:var(--blue-400);background:var(--blue-50)}
.dropzone.dragover{border-color:var(--blue-500);background:var(--blue-50);transform:scale(1.01)}
.dropzone .plus{font-size:30px;color:var(--blue-400);line-height:1}
.dropzone .main{font-size:14px;color:var(--ink-soft);font-weight:600;margin-top:10px}
.dropzone .sub{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.7}
.dropzone .thumb{width:100%;max-height:200px;object-fit:cover;border-radius:12px;margin-bottom:12px}
.dropzone.filled{border-style:solid;border-color:var(--blue-200);background:#fff}
.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.editor-toolbar{display:flex;gap:6px;flex-wrap:wrap;padding:10px;border:1px solid var(--line);border-bottom:0;border-radius:12px 12px 0 0;background:#fbfdff}
.editor-toolbar button{width:32px;height:32px;border-radius:8px;font-size:13px;font-weight:600;color:var(--ink-soft);border:1px solid transparent}
.editor-toolbar button:hover{background:#fff;border-color:var(--line);color:var(--blue-600)}
.editor{border:1px solid var(--line);border-radius:0 0 12px 12px;min-height:170px;padding:14px;font-size:14px;line-height:1.9;outline:none;background:#fff}
.editor:focus{border-color:var(--blue-400);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.price-switch{display:flex;gap:12px;margin-bottom:16px}
.price-option{flex:1;padding:16px;border:1px solid var(--line);border-radius:14px;text-align:center;transition:all var(--ease);background:#fff}
.price-option:hover{border-color:var(--blue-300)}
.price-option.active{border-color:var(--blue-500);background:var(--blue-50);box-shadow:0 10px 24px rgba(59,130,246,.14)}
.price-option b{font-size:14px;color:var(--ink)}
.price-option small{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.tips{display:flex;gap:12px;align-items:flex-start;background:var(--amber-50);border:1px solid rgba(251,191,36,.4);border-radius:14px;padding:14px 16px;font-size:12.5px;color:#92400e;line-height:1.9}
.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--ink-soft);line-height:1.8}
.checkbox input{margin-top:3px;width:16px;height:16px;accent-color:var(--blue-500);flex:none}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:88px;background:linear-gradient(135deg,#131c33,#1e2a49);color:#c7d2e4;padding:52px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:36px}
.footer-brand .brand-text b{color:#fff}
.footer-brand .brand-text span{color:#8fa1c0}
.footer-brand p{font-size:13px;line-height:2;color:#98a8c4;margin-top:16px}
.footer-col h5{font-size:13px;color:#fff;font-weight:600;margin-bottom:16px;letter-spacing:.5px}
.footer-col a{display:block;font-size:13px;color:#98a8c4;margin-bottom:11px;transition:color var(--ease)}
.footer-col a:hover{color:#fff}
.footer-partner{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:#9db3d8;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:9px 14px;margin-top:18px}
.footer-bottom{margin-top:36px;padding-top:22px;border-top:1px solid rgba(255,255,255,.09);display:flex;justify-content:space-between;font-size:12.5px;color:#7d8db0;flex-wrap:wrap;gap:10px}
.footer-bottom a:hover{color:#fff}

.to-top{position:fixed;right:26px;bottom:30px;z-index:800;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-size:18px;color:#fff;background:linear-gradient(135deg,var(--blue-500),var(--indigo-500));box-shadow:0 12px 30px rgba(59,130,246,.36);opacity:0;visibility:hidden;transform:translateY(14px);transition:all var(--ease)}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-3px)}

/* ---------- Toast ---------- */
.toast-root{position:fixed;top:22px;left:50%;transform:translateX(-50%);z-index:2000;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.toast{pointer-events:auto;min-width:200px;max-width:min(520px,92vw);padding:12px 18px;border-radius:14px;background:rgba(23,32,58,.94);color:#fff;font-size:13.5px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:10px;animation:toastIn .26s cubic-bezier(.2,.9,.3,1.15)}
.toast.ok{background:rgba(16,110,72,.95)}
.toast.err{background:rgba(178,40,40,.95)}
.toast.warn{background:rgba(180,110,10,.95)}
@keyframes toastIn{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:none}}

/* ---------- 骨架屏 / 加载 ---------- */
.skeleton{background:linear-gradient(90deg,#eef2f8 25%,#e2e9f4 37%,#eef2f8 63%);background-size:400% 100%;animation:shimmer 1.4s infinite;border-radius:12px}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:-100% 0}}
.loading{display:flex;align-items:center;justify-content:center;gap:10px;padding:60px 0;color:var(--muted);font-size:14px}
.spinner{width:18px;height:18px;border-radius:50%;border:2px solid var(--blue-200);border-top-color:var(--blue-500);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 登录弹窗 ---------- */
.auth-tabs{display:flex;gap:6px;background:var(--gray-100);border-radius:12px;padding:4px;margin-bottom:20px}
.auth-tabs button{flex:1;height:36px;border-radius:9px;font-size:13.5px;color:var(--ink-soft);font-weight:600;transition:all var(--ease)}
.auth-tabs button.active{background:#fff;color:var(--blue-600);box-shadow:var(--shadow-xs)}

/* ---------- 积分明细 ---------- */
.points-list{display:flex;flex-direction:column}
.points-row{display:flex;align-items:center;gap:14px;padding:14px 2px;border-bottom:1px dashed var(--line)}
.points-row:last-child{border-bottom:0}
.points-row .reason{flex:1;font-size:13.5px;color:var(--ink-soft)}
.points-row .time{font-size:12px;color:var(--muted)}
.points-row .delta{font-size:14px;font-weight:700;min-width:64px;text-align:right}
.points-row .delta.plus{color:var(--green-600)}
.points-row .delta.minus{color:var(--red-500)}
.points-summary{display:flex;align-items:center;gap:14px;padding:18px;border-radius:16px;background:linear-gradient(135deg,var(--amber-50),#fef9c3);border:1px solid rgba(251,191,36,.45);margin-bottom:18px}
.points-summary b{font-family:var(--font-serif);font-size:30px;color:#92400e}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .assistant{grid-template-columns:1fr}
  .assistant-chat{border-right:0;border-bottom:1px solid var(--line)}
  .detail{grid-template-columns:1fr}
  .detail-side{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .page-wrap{padding:0 18px}
  .site-header{width:calc(100% - 24px)}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:calc(var(--header-h) + 10px);left:0;right:0;flex-direction:column;background:var(--glass-strong);backdrop-filter:blur(22px);border-radius:18px;padding:12px;box-shadow:var(--shadow-lg);align-items:stretch}
  .nav.open a{height:44px}
  .header-toggle{display:grid;place-items:center}
  .header-inner{grid-template-columns:minmax(0,1fr) auto}
  .stats{grid-template-columns:repeat(2,1fr)}
  .browse-layout{grid-template-columns:1fr}
  .filters{position:static;max-height:none}
  .hero-title h1{font-size:30px}
  .section-head h2{font-size:25px}
  .card-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
}
@media (max-width:640px){
  .brand-text span{display:none}
  .points-badge{display:none}
  .footer-grid{grid-template-columns:1fr}
  .modal-mask{padding:12px}
  .modal-body{padding:16px}
}