/* ============================================================
   小说推文工具站 · 前台设计系统（A 版：现代清爽）
   配色：白底 + 靛蓝主色 + 圆角卡片 + 轻阴影 + 大留白
   ============================================================ */

:root{
  --bg:#ffffff;
  --surface:#f7f8fc;
  --surface-2:#eef1f7;
  --ink:#0f172a;
  --muted:#64748b;
  --faint:#94a3b8;
  --line:#e6e9f2;
  --primary:#4f46e5;
  --primary-700:#4338ca;
  --primary-soft:#eef0ff;
  --accent:#7c3aed;
  --danger:#b91c1c;
  --ok:#15803d;
  --radius:16px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 18px 40px -20px rgba(15,23,42,.28);
  --maxw:1120px;
}

*{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.15}
p{margin:0}
ul,ol{margin:0}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:10px;font-weight:600;font-size:14px;
  border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;
  font-family:inherit;line-height:1.2;
  transition:transform .16s ease, box-shadow .16s ease, background .16s, border-color .16s;
}
.btn:hover{border-color:#c4c9dd}
.btn-primary{
  background:var(--primary);color:#fff;border-color:transparent;
  box-shadow:0 10px 22px -12px rgba(79,70,229,.9);
}
.btn-primary:hover{background:var(--primary-700);transform:translateY(-1px)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:#c4c9dd}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{background:var(--surface);color:var(--ink)}
.btn-lg{padding:14px 24px;font-size:15px;border-radius:12px}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ---------------- 顶部导航 ---------------- */
.site-header{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;letter-spacing:-.01em}
.brand-mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--primary),var(--accent));
  color:#fff;font-size:15px;font-weight:700;flex:0 0 auto;
}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{padding:8px 12px;border-radius:8px;font-size:14px;color:var(--muted);font-weight:500}
.nav a:hover{color:var(--ink);background:var(--surface)}
.nav a.active{color:var(--primary);background:var(--primary-soft)}
.header-actions{margin-left:auto;display:flex;gap:8px;align-items:center}
@media(max-width:860px){.nav{display:none}}

/* ---------------- 首页 hero ---------------- */
.hero{
  position:relative;overflow:hidden;padding:76px 0 54px;
  background:radial-gradient(58% 70% at 50% -10%,#eef0ff 0%,rgba(255,255,255,0) 68%);
}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-soft);padding:6px 14px;border-radius:999px;
}
.hero h1{font-size:clamp(34px,5vw,56px);font-weight:800;margin:20px 0 18px;max-width:820px}
.hero .lead{font-size:18px;color:var(--muted);max-width:640px}
.hero .cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero .micro{font-size:13px;color:var(--faint);margin-top:16px}

/* ---------------- 通用区块标题 ---------------- */
.section-head{text-align:center;margin:0 auto 40px;max-width:660px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:800}
.section-head p{color:var(--muted);margin-top:12px;font-size:15px}

/* ---------------- 工具卡片 ---------------- */
.tools{padding:64px 24px}
.tools-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:960px){.tools-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.tools-grid{grid-template-columns:1fr}}
.tool-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s;
}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#dcdfef}
.tool-card .idx{font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--primary);margin-bottom:16px}
.tool-card .tool-name{font-size:18px;font-weight:700;margin-bottom:10px}
.tool-card .tool-name a:hover{color:var(--primary)}
.tool-card .tagline{color:var(--muted);font-size:14px;margin-bottom:8px}
.tool-card .desc{color:var(--muted);font-size:14px;margin-bottom:20px}
.tool-card .tool-enter{margin-top:auto;font-size:14px;font-weight:600;color:var(--primary)}
.tool-card .empty{color:var(--muted)}

/* ---------------- 底部 CTA 带 ---------------- */
.band-wrap{padding:12px 24px 72px}
.band{
  background:linear-gradient(135deg,#4f46e5,#7c3aed);border-radius:26px;color:#fff;
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
  box-shadow:0 30px 60px -30px rgba(79,70,229,.8);
}
.band h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;max-width:520px}
.band p{margin-top:10px;color:rgba(255,255,255,.82);font-size:15px}
.band .btn{background:#fff;color:var(--primary);border-color:transparent;box-shadow:none}
.band .btn:hover{background:#eef0ff}

/* ---------------- 页脚 ---------------- */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:44px 24px 34px}
.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.site-footer .brand{font-size:15px}
.site-footer .foot-note{display:block;color:var(--muted);margin-top:10px;font-size:13px;line-height:1.9}
.footer-cols{display:flex;gap:56px;flex-wrap:wrap}
.footer-col h4{font-size:13px;font-weight:700;margin-bottom:12px}
.footer-col a{display:block;color:var(--muted);font-size:13.5px;padding:3px 0}
.footer-col a:hover{color:var(--ink)}

/* ---------------- 工具页 ---------------- */
.page-head{padding:44px 0 8px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.breadcrumb a:hover{color:var(--ink)}
.page-title{font-size:clamp(28px,3.4vw,40px);font-weight:800}
.page-intro{color:var(--muted);max-width:680px;margin-top:14px;font-size:16px}

.tool-layout{
  display:grid;grid-template-columns:1.05fr .95fr;gap:24px;
  padding:36px 0 8px;align-items:start;
}
@media(max-width:920px){.tool-layout{grid-template-columns:1fr}}

.panel{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:26px;box-shadow:var(--shadow-sm);
}

/* 表单 */
.field{margin-bottom:18px}
.field:last-child{margin-bottom:0}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:8px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
input[type=text],input[type=password],input[type=email],textarea,select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font:inherit;font-size:14px;background:#fbfcfe;color:var(--ink);transition:.16s;
}
textarea{min-height:116px;resize:vertical}
input:focus,textarea:focus,select:focus{
  outline:none;border-color:var(--primary);background:#fff;
  box-shadow:0 0 0 4px rgba(79,70,229,.13);
}

/* 结果区 */
.result-card{
  background:#0f172a;color:#e2e8f0;border-radius:18px;padding:26px;
  box-shadow:var(--shadow);
}
.result-top{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.1);
}
.result-top b{font-size:14px;color:#fff;letter-spacing:.02em}
.result{color:#e2e8f0}
.result .result-text{
  margin:0;white-space:pre-wrap;word-break:break-word;
  font-family:inherit;font-size:14.5px;line-height:1.95;color:#e2e8f0;
}
.result .result-images{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.result .result-images img{border-radius:10px;border:1px solid rgba(255,255,255,.1)}
.hint{color:var(--muted);font-size:13.5px;margin:0}
.result .hint{color:#94a3b8}

/* SEO 内容区 */
.seo-block{padding:26px 0 72px}
.seo-block h2{font-size:20px;font-weight:700;margin:38px 0 12px}
.seo-block p{color:var(--muted);font-size:15px;max-width:760px}
.seo-block ol{color:var(--muted);font-size:15px;max-width:760px;padding-left:22px;line-height:2.1}
.seo-block ol li strong{color:var(--ink)}
.faq{border-top:1px solid var(--line);margin-top:26px}
.faq dt{font-weight:600;font-size:15px;padding:18px 0 6px}
.faq dd{margin:0;color:var(--muted);font-size:14.5px;padding-bottom:18px;border-bottom:1px solid var(--line)}

/* 工具页信息小卡（可选） */
.tips{
  margin-top:18px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:14px 16px;font-size:13.5px;color:var(--muted);
}
.tips strong{color:var(--ink)}

/* ---------------- 轻量提示条 ---------------- */
.nt-toast{
  position:fixed;left:50%;bottom:34px;z-index:99;
  transform:translate(-50%,12px);
  background:#0f172a;color:#fff;font-size:14px;font-weight:500;
  padding:11px 20px;border-radius:10px;
  box-shadow:0 14px 34px -14px rgba(15,23,42,.7);
  opacity:0;pointer-events:none;transition:opacity .25s ease, transform .25s ease;
}
.nt-toast.show{opacity:1;transform:translate(-50%,0)}