/* ==========================================================================
   Tronrents.cc — 全站样式
   说明：
   1) 视觉与 trxenergy.cc 保持一致（配色 / 圆角 / 布局 / 组件）
   2) 纯 CSS，无外链字体、无 CDN 资源，保证国内（百度蜘蛛）秒开
   3) 关键内容全部由 HTML 渲染，不依赖 JS，利于百度收录
   ========================================================================== */

:root {
  --bg:#0b0d10;--bg-soft:#111418;--card:#151a21;--muted:#9aa4b2;--text:#e8eef7;
  --primary:#48a6ff;--primary-600:#2a8de6;--accent:#85f7cf;--border:#1f2630;
  --success:#22c55e;--danger:#ef4444;--shadow:0 6px 30px rgba(0,0,0,.3);
  --notice-h:40px;
}
html[data-theme="light"]{
  --bg:#fff;--bg-soft:#f6f8fb;--card:#fff;--muted:#5b6776;--text:#0f1720;
  --primary:#2563eb;--primary-600:#1e4fc7;--accent:#0ea5e9;--border:#e6eaf0;
  --shadow:0 8px 24px rgba(16,24,40,.08);
}
*{box-sizing:border-box}
html,body{height:100%}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:linear-gradient(180deg,var(--bg) 0%,var(--bg-soft) 100%);-webkit-font-smoothing:antialiased}
a{color:var(--primary)}
img,svg{max-width:100%}

/* 基础排版 -------------------------------------------------------------- */
.h1{font-size:44px;line-height:1.15;margin:0 0 10px}
.h2{font-size:30px;line-height:1.25;margin:0 0 12px}
.lead{color:var(--muted);font-size:18px;margin:0 0 18px}
.s{font-size:13px}
.mono-line{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--card);word-break:break-all}
.muted{color:var(--muted)}
.center{text-align:center}

.container{width:min(1120px,92%);margin:0 auto}
.container-narrow{width:min(880px,92%);margin:0 auto}
.section{padding:64px 0}
.section-alt{background:color-mix(in oklab,var(--bg-soft),transparent 30%)}
.section-title{font-size:30px;margin:0 0 8px}
.section-sub{color:var(--muted);margin:0 0 22px}

.stack-24>*+*{margin-top:24px}
.stack-20>*+*{margin-top:20px}
.stack-16>*+*{margin-top:16px}
.stack-12>*+*{margin-top:12px}
.align-end{display:flex;align-items:end}
.gap-8{gap:8px}

/* 按钮 / 输入 ----------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;border-radius:10px;border:1px solid transparent;font-weight:600;cursor:pointer;transition:.2s;text-decoration:none;font-size:15px;font-family:inherit}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-outline{background:transparent;border-color:var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost{background:transparent;color:var(--text)}
.w-full{width:100%}
.input,.select{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--card);color:var(--text);outline:none;font-size:15px;font-family:inherit}
.input:focus,.select:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in oklab,var(--primary),transparent 80%)}
.metric{font-weight:800;font-size:18px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:600}

/* 开关 */
.switch{position:relative;display:inline-block;width:44px;height:24px;margin:0}
.switch input{position:absolute;opacity:0;width:44px;height:24px;cursor:pointer;z-index:2;margin:0}
.slider{position:absolute;cursor:pointer;inset:0;background:var(--border);border-radius:999px;transition:.2s}
.slider:before{content:"";position:absolute;height:18px;width:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+.slider{background:var(--primary)}
.switch input:checked+.slider:before{transform:translateX(20px)}

/* 顶部通知 -------------------------------------------------------------- */
.notice-bar{background:linear-gradient(90deg,var(--primary) 0%,var(--accent) 100%);color:#081018;position:sticky;top:0;z-index:20}
.notice-content{display:flex;align-items:center;gap:14px;padding:8px 0}
.badge{font-weight:700;background:rgba(255,255,255,.85);padding:4px 8px;border-radius:999px;white-space:nowrap;font-size:13px}
.ticker{overflow:hidden;flex:1;white-space:nowrap}
.ticker span{display:inline-block;padding-right:32px;animation:ticker 18s linear infinite;font-size:14px}
.notice-close{background:transparent;border:none;font-size:20px;cursor:pointer;color:#081018;line-height:1}
@keyframes ticker{0%{transform:translate3d(0,0,0)}100%{transform:translate3d(-100%,0,0)}}

/* 头部 ------------------------------------------------------------------ */
.header{position:sticky;top:var(--notice-h);z-index:10;backdrop-filter:saturate(140%) blur(8px);background:color-mix(in oklab,var(--bg-soft),transparent 30%);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;letter-spacing:.2px}
.logo-mark{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:6px;background:var(--primary);color:#fff;font-weight:900}
.nav{display:none;gap:20px}
.nav a{color:var(--muted);text-decoration:none;font-weight:600}
.nav a:hover,.nav a[aria-current="page"]{color:var(--text)}
.actions{display:flex;align-items:center;gap:10px}
.hamburger{display:inline-flex;flex-direction:column;gap:4px;background:transparent;border:none;padding:6px;cursor:pointer}
.hamburger span{width:20px;height:2px;background:var(--text);border-radius:999px}

/* 面包屑（SEO 友好：真实可见路径） */
.breadcrumb{font-size:13px;color:var(--muted);padding:14px 0 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--border)}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb [aria-current="page"]{color:var(--text);font-weight:600}

/* 移动抽屉 */
.mobile-drawer{position:fixed;inset:64px 0 0 auto;width:78%;max-width:360px;background:var(--card);border-left:1px solid var(--border);transform:translateX(100%);transition:transform .25s ease;box-shadow:var(--shadow)}
.mobile-drawer.open{transform:translateX(0)}
.mobile-nav{display:grid;gap:14px;padding:18px}
.mobile-nav a{color:var(--text);text-decoration:none;font-weight:600}

/* Hero ------------------------------------------------------------------ */
.hero{padding:48px 0 24px}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.hero-bullets{margin:12px 0 0;padding-left:18px;color:var(--muted)}
.hero-bullets li{margin:6px 0}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap}
.hero-visual{display:grid;place-items:center}
.glassy-card{width:100%;max-width:480px;padding:18px;border-radius:16px;background:color-mix(in oklab,var(--card),transparent 10%);border:1px solid var(--border);box-shadow:var(--shadow)}
.stat{display:flex;align-items:baseline;justify-content:space-between}
.stat-label{color:var(--muted);font-size:13px}
.stat-value{font-size:18px;font-weight:700}
.chart-spark{height:84px;margin:10px 0;border-radius:8px;background:linear-gradient(180deg,color-mix(in oklab,var(--primary),transparent 70%),transparent);position:relative;overflow:hidden}
.chart-spark::after{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 10px,color-mix(in oklab,var(--primary),transparent 80%) 10px 11px);opacity:.25}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stat-grid div{background:var(--bg-soft);border:1px solid var(--border);border-radius:12px;padding:10px}
.stat-grid span{color:var(--muted);font-size:12px;display:block}

/* 布局网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

/* 卡片 / 强调 */
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.callout{border-left:4px solid var(--primary);background:color-mix(in oklab,var(--primary),transparent 92%)}
.callout p{margin:0 0 8px}
.callout p:last-child{margin-bottom:0}
.feature .icon{font-size:22px;width:40px;height:40px;display:grid;place-items:center;border-radius:10px;background:color-mix(in oklab,var(--primary),transparent 80%);margin-bottom:10px}
.nice-cards .card{padding:20px}

/* Steps */
.steps{counter-reset:step;list-style:none;margin:0;padding:0}
.steps li{display:grid;grid-template-columns:28px 1fr;gap:12px;padding:12px 0;border-bottom:1px dashed var(--border)}
.steps li:last-child{border-bottom:none}
.step-dot{width:12px;height:12px;border-radius:50%;background:var(--primary);margin-top:6px}
.step-body h3{margin:0 0 6px;font-size:16px}
.steps p{margin:0}

/* FAQ */
.accordion details{border:1px solid var(--border);border-radius:12px;background:var(--card);padding:12px 14px;margin-bottom:10px}
.accordion summary{cursor:pointer;font-weight:700;list-style:none}
.accordion summary::-webkit-details-marker{display:none}
.details-body{margin-top:8px;color:var(--muted)}
.better-faq details summary{font-size:16px}
details[open] summary{color:var(--primary)}

/* 表格（利于百度抓取结构化数据） */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px;background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
th{background:var(--bg-soft);font-weight:700}
tbody tr:last-child td{border-bottom:none}

/* 正文 */
.prose{max-width:820px}
.prose h2{font-size:24px;margin:28px 0 10px}
.prose h3{font-size:19px;margin:22px 0 8px}
.prose p,.prose li{line-height:1.8;color:var(--muted)}
.prose strong{color:var(--text)}
.prose ul{padding-left:20px}

/* 页脚 */
.footer{margin-top:36px;padding:28px 0 44px;border-top:1px solid var(--border);background:color-mix(in oklab,var(--bg-soft),transparent 10%);position:relative}
.footer-inner{display:flex;align-items:flex-start;justify-content:space-between;gap:28px;flex-wrap:wrap}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.footer-links h4{margin:0 0 8px;font-size:14px}
.footer a{display:inline-block;margin:6px 0;color:var(--muted);text-decoration:none}
.footer a:hover{color:var(--text)}
.footer .logo{margin:0}
.back-to-top{position:absolute;right:16px;bottom:16px;border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:10px;padding:8px 10px;cursor:pointer}

/* 提示气泡 */
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--text);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:99}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* 跳转到主内容（无障碍 / 体验） */
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:8px;top:8px;z-index:100;padding:8px 12px;background:var(--card);border-radius:8px}

/* 响应式 */
@media (min-width:900px){.nav{display:inline-flex}.hamburger{display:none}}
@media (max-width:899px){
  .hero-inner{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .h1{font-size:32px}
  .lead{font-size:16px}
  .section{padding:48px 0}
  .section-title{font-size:24px}
  .footer-links{grid-template-columns:1fr 1fr}
}

/* 桌面端隐藏 mobile-drawer，手机端才显示 */
.mobile-drawer{display:none}
@media (max-width:899px){
  .mobile-drawer{display:block;transform:translateX(100%);visibility:hidden;pointer-events:none;transition:transform .25s ease}
  .mobile-drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}
}

@media print{.notice-bar,.header,.back-to-top,.hero-visual{display:none}}