/* ============================================================
   橙建AI标书 · 官网全局样式
   依据《橙建AI标书-Claude建站指导文档》V1.0 第二章 VI规范
   ============================================================ */

:root {
  --brand: #C8501E;            /* 品牌主色（橙） */
  --brand-hover: #E8703C;      /* 主色浅橙 hover */
  --brand-bg: #FDF3EE;         /* 橙色系浅底 */
  --bg-white: #FFFFFF;
  --bg-gray: #F7F8FA;
  --blue-bg: #EAF3FB;          /* 辅助浅蓝底 */
  --blue: #3B82C4;             /* 浅蓝点缀 */
  --text-main: #1F2329;
  --text-sub: #646A73;
  --border: #E5E6EB;
  --success: #2BA471;
  --warning: #E6A23C;
  --danger: #D54941;
  --radius: 12px;
  --shadow-card: 0 2px 8px rgba(31, 35, 41, .06);
  --shadow-hover: 0 8px 24px rgba(31, 35, 41, .10);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-weight: 400;
  font-style: normal;
  color: var(--text-main);
  background: var(--bg-white);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
em, i { font-style: normal; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 14px; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航栏（维护提示 + 64px 白底 吸顶） ---------- */
.navbar {
  position: sticky; top: 0; z-index: 900;
  height: 96px; background: var(--bg-white);
  border-bottom: 1px solid var(--border);
}
.maintenance-notice {
  background: #EAF4FB; color: var(--danger); font-size: 14px;
  line-height: 1; text-align: center; padding: 9px 24px;
}
.navbar .container {
  height: 64px; display: flex; align-items: center; gap: 40px;
}
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo img { height: 40px; width: auto; }   /* 64px栏高，logo取40px，上下12px呼吸 */
.nav-links { display: flex; gap: 32px; flex: 1; }
.nav-links a {
  font-size: 15px; color: var(--text-main); padding: 4px 2px;
  border-bottom: 2px solid transparent; transition: color .2s;
}
.nav-links a:hover { color: var(--brand); }
.nav-links a.active { color: var(--brand); border-bottom-color: var(--brand); }
.nav-actions { display: flex; gap: 12px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 8px; font-size: 15px; padding: 9px 22px;
  border: 1px solid transparent; transition: all .25s; white-space: nowrap;
}
.btn-primary { background: var(--brand); color: #fff; font-weight: 700; }
.btn-primary:hover { background: var(--brand-hover); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-outline { background: transparent; color: var(--brand); border-color: var(--brand); }
.btn-outline:hover { background: var(--brand-bg); }
.btn-lg { padding: 14px 34px; font-size: 17px; border-radius: 10px; }
.btn-block { width: 100%; }

/* 已登录态导航 */
.nav-user { display: none; align-items: center; gap: 12px; }
.nav-user.show { display: flex; }
.nav-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand-bg); color: var(--brand);
  display: flex; align-items: center; justify-content: center; font-size: 15px;
}
.nav-quota { font-size: 13px; color: var(--text-sub); }

/* 汉堡菜单（移动端） */
.nav-burger { display: none; background: none; border: 0; padding: 8px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--text-main); margin: 5px 0; transition: .3s; }

/* ---------- 通用分屏 ---------- */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-gray); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: 32px; font-weight: 700; line-height: 1.4; }
.section-head p { color: var(--text-sub); margin-top: 14px; font-size: 16px; }

/* ---------- Hero 首屏 ---------- */
.hero {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--brand-bg) 100%);
  position: relative; overflow: hidden;
}
.hero::after {                       /* 右侧淡网格纹理 */
  content: ""; position: absolute; right: 0; top: 0; width: 50%; height: 100%;
  background-image: linear-gradient(rgba(200, 80, 30, .05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(200, 80, 30, .05) 1px, transparent 1px);
  background-size: 36px 36px; pointer-events: none;
}
.hero .container {
  display: flex; align-items: center; gap: 48px;
  padding-top: 88px; padding-bottom: 88px; position: relative; z-index: 1;
}
.hero-left { flex: 0 0 55%; }
.hero-left h1 { font-size: 48px; line-height: 1.3; font-weight: 700; }
.hero-left h1 .em { color: var(--brand); }
.hero-sub { font-size: 18px; color: var(--text-sub); margin-top: 18px; }
.hero-tags { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.hero-tags span {
  background: #fff; border: 1px solid var(--border); color: var(--text-sub);
  font-size: 13px; padding: 4px 14px; border-radius: 999px;
}
.hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-right { flex: 1; min-width: 0; }

/* Hero 右侧：解析→生成→校验 流程动效卡片 */
.demo-card {
  background: #fff; border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow-hover); padding: 22px; position: relative;
}
.demo-card .dc-bar { display: flex; gap: 6px; margin-bottom: 16px; }
.demo-card .dc-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.demo-card .dc-bar i:first-child { background: var(--brand-hover); }
.demo-flow { display: flex; flex-direction: column; gap: 12px; }
.demo-step {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-gray); border-radius: 10px; padding: 12px 16px;
  border: 1px solid transparent; opacity: .45;
  transition: opacity .4s, border-color .4s, background .4s, transform .4s;
}
.demo-step.act {
  opacity: 1; background: #fff; border-color: var(--brand);
  transform: translateX(4px); box-shadow: var(--shadow-card);
}
.demo-step.lit { opacity: 1; }
.demo-step .ds-ico {
  width: 34px; height: 34px; border-radius: 8px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 17px;
  background: var(--brand-bg); color: var(--brand);
}
.demo-step.blue .ds-ico { background: var(--blue-bg); color: var(--blue); }
.demo-step .ds-t { font-size: 14px; }
.demo-step .ds-d { font-size: 12px; color: var(--text-sub); }
.demo-step .ds-ok { margin-left: auto; color: var(--success); font-size: 15px; opacity: 0; transition: opacity .3s; }
.demo-step.lit .ds-ok { opacity: 1; }
.demo-step.act .ds-ok { color: var(--brand); animation: dsPulse 1s ease infinite; }
@keyframes dsPulse { 0%, 100% { opacity: .25; } 50% { opacity: 1; } }
.demo-bar-track { height: 6px; background: var(--border); border-radius: 3px; margin-top: 16px; overflow: hidden; }
.demo-bar-fill { height: 100%; width: 4%; background: linear-gradient(90deg, var(--brand), var(--brand-hover)); border-radius: 3px; transition: width .9s ease; }
.demo-caption { text-align: center; font-size: 12px; color: var(--text-sub); margin-top: 10px; min-height: 18px; }

/* ---------- 第2屏 痛点对比 ---------- */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.compare-card {
  border-radius: var(--radius); padding: 34px 32px; border: 1px solid var(--border); background: #fff;
}
.compare-card.bad { background: var(--bg-gray); }
.compare-card.good { border-color: rgba(200, 80, 30, .35); box-shadow: var(--shadow-card); }
.compare-card h3 { font-size: 20px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.compare-card .cc-time { font-size: 14px; padding: 3px 12px; border-radius: 999px; }
.compare-card.bad .cc-time { background: #ECEDF0; color: var(--text-sub); }
.compare-card.good .cc-time { background: var(--brand-bg); color: var(--brand); }
.compare-card ul { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.compare-card li { display: flex; gap: 10px; font-size: 15px; color: var(--text-sub); }
.compare-card li .mark { flex-shrink: 0; }
.compare-card.bad li .mark { color: var(--danger); }
.compare-card.good li .mark { color: var(--success); }
.stats-row { display: flex; justify-content: center; gap: 90px; margin-top: 64px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-item .num { font-size: 48px; font-weight: 700; color: var(--brand); line-height: 1.2; }
.stat-item .num small { font-size: 22px; }
.stat-item .label { color: var(--text-sub); font-size: 15px; margin-top: 6px; }

/* ---------- 第3屏 六大功能卡片 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 28px; transition: all .3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(200, 80, 30, .3); }
.feature-card .fc-ico {
  width: 40px; height: 40px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
}
.feature-card .fc-ico svg { width: 40px; height: 40px; stroke: var(--brand); fill: none; stroke-width: 1.6; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-sub); }
.feature-card .fc-more { display: inline-block; margin-top: 14px; font-size: 14px; color: var(--brand); }

/* ---------- 第4屏 6步流程 ---------- */
.steps-band { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; position: relative; }
.step-node { text-align: center; position: relative; padding: 0 4px; }
.step-node .sn-num {
  width: 44px; height: 44px; margin: 0 auto; border-radius: 50%;
  background: #fff; border: 2px solid var(--brand); color: var(--brand);
  display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700;
  position: relative; z-index: 1;
}
.step-node::before {
  content: ""; position: absolute; top: 22px; left: -50%; width: 100%;
  border-top: 2px dashed rgba(200, 80, 30, .35);
}
.step-node:first-child::before { display: none; }
.step-node h4 { font-size: 15px; margin-top: 14px; font-weight: 400; }
.step-node p { font-size: 12px; color: var(--text-sub); margin-top: 4px; }
.step-thumb {
  margin-top: 14px; background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 8px; font-size: 11px; color: var(--text-sub); line-height: 1.6; text-align: left;
  min-height: 84px;
}
.step-thumb .tline { height: 5px; border-radius: 3px; background: var(--bg-gray); margin: 5px 0; }
.step-thumb .tline.hl { background: var(--brand-bg); }
.steps-note { text-align: center; color: var(--text-sub); font-size: 15px; margin-top: 40px; }
.steps-note .em { color: var(--brand); }

/* ---------- 第5屏 差异化卖点 ---------- */
.usp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.usp-card {
  border-radius: var(--radius); padding: 36px 30px; background: #fff;
  border: 1px solid var(--border); border-top: 3px solid var(--brand); transition: all .3s;
}
.usp-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.usp-card .uc-tag {
  display: inline-block; background: var(--brand-bg); color: var(--brand);
  font-size: 12px; padding: 3px 12px; border-radius: 999px; margin-bottom: 16px;
}
.usp-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.usp-card p { font-size: 14px; color: var(--text-sub); }

/* ---------- 第6屏 信任与背书 ---------- */
.trust-box {
  background: var(--blue-bg); border-radius: 16px; padding: 56px 64px; text-align: center;
}
.trust-box .quote { font-size: 18px; line-height: 2; max-width: 860px; margin: 0 auto; }
.trust-box .quote .em { color: var(--blue); }
.trust-tags { display: flex; justify-content: center; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.trust-tags span {
  background: #fff; border-radius: 999px; padding: 6px 20px; font-size: 14px; color: var(--text-sub);
}
.trust-tags .tt-check { color: var(--success); font-weight: 700; margin-right: 7px; }

/* 关于我们 · 公司介绍长文排版（中文版式：首行缩进2字符，文字距边框2字符） */
.about-rich { text-align: left; padding: 44px 30px; }
.about-rich p { font-size: 15px; line-height: 2.1; color: var(--text-main); font-weight: 400; text-indent: 2em; margin: 0 0 16px; }
.about-rich p:last-of-type { margin-bottom: 0; }
.about-rich .trust-tags { margin-top: 30px; justify-content: space-between; padding: 0 2em; gap: 12px; }
.about-rich .trust-tags span { color: var(--text-main); }

/* ---------- 定价（次数卡体系） ---------- */
/* 新人专享 · 体验卡横幅 */
.trial-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
  background: linear-gradient(120deg, var(--brand-bg), #fff 60%);
  border: 1px solid #F3D9CB; border-radius: 16px;
  padding: 26px 34px; margin-bottom: 40px;
}
.trial-banner .tb-left { display: flex; align-items: center; gap: 20px; min-width: 0; }
.trial-banner .tb-tag {
  flex-shrink: 0; background: var(--brand); color: #fff; font-size: 13px;
  padding: 6px 14px; border-radius: 999px;
}
.trial-banner .tb-info h3 { font-size: 18px; font-weight: 700; }
.trial-banner .tb-info p { font-size: 13px; color: var(--text-sub); margin-top: 6px; }
.trial-banner .tb-right { display: flex; align-items: center; gap: 22px; flex-shrink: 0; }
.trial-banner .tb-price .cur { font-size: 18px; color: var(--brand); }
.trial-banner .tb-price .num { font-size: 38px; font-weight: 700; color: var(--brand); }
.trial-banner .tb-price .unit { font-size: 13px; color: var(--text-sub); }

.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.price-card {
  background: #fff; border: 1px solid var(--border); border-radius: 16px;
  padding: 36px 30px; display: flex; flex-direction: column; position: relative; transition: all .3s;
}
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.price-card.popular {
  transform: scale(1.05); border-color: var(--brand); box-shadow: var(--shadow-hover); z-index: 1;
}
.price-card.popular:hover { transform: scale(1.05) translateY(-4px); }
.pc-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--brand); color: #fff; font-size: 13px; padding: 3px 18px; border-radius: 999px;
  white-space: nowrap;
}
.pc-badge.lite { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.pc-name { font-size: 18px; font-weight: 700; }
.pc-desc { font-size: 13px; color: var(--text-sub); margin-top: 6px; min-height: 40px; }
.pc-price { margin: 20px 0 4px; }
.pc-price .cur { font-size: 20px; color: var(--brand); }
.pc-price .num { font-size: 44px; font-weight: 700; color: var(--brand); }
.pc-price .unit { font-size: 14px; color: var(--text-sub); }
.pc-origin { font-size: 13px; color: var(--text-sub); min-height: 20px; }
.pc-list { margin: 22px 0; display: flex; flex-direction: column; gap: 11px; flex: 1; }
.pc-list li { display: flex; gap: 9px; font-size: 14px; color: var(--text-sub); }
.pc-list li .ok { color: var(--success); flex-shrink: 0; }
.price-note { text-align: center; color: var(--text-sub); font-size: 13px; margin-top: 34px; line-height: 2; }

/* 加油包 */
.booster-wrap {
  margin-top: 40px; background: var(--bg-gray); border-radius: 16px; padding: 30px 34px;
}
.booster-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.booster-head h3 { font-size: 18px; font-weight: 700; }
.booster-head p { font-size: 13px; color: var(--text-sub); }
.booster-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.booster-card {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 24px; display: flex; align-items: center; gap: 18px; transition: all .25s;
}
.booster-card:hover { border-color: var(--brand); box-shadow: var(--shadow-card); }
.booster-card .bc-name { font-size: 15px; flex-shrink: 0; }
.booster-card .bc-price { flex-shrink: 0; }
.booster-card .bc-price .cur { font-size: 14px; color: var(--brand); }
.booster-card .bc-price .num { font-size: 26px; font-weight: 700; color: var(--brand); }
.booster-card .bc-price .unit { font-size: 12px; color: var(--text-sub); }
.booster-card .bc-sub { font-size: 12px; color: var(--text-sub); flex: 1; }
.booster-card .btn { margin-left: auto; flex-shrink: 0; }

/* 权益对比表 */
.cmp-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card); }
.cmp-table th, .cmp-table td { padding: 14px 18px; border-bottom: 1px solid var(--border); font-size: 14px; text-align: center; }
.cmp-table th { background: var(--bg-gray); font-weight: 700; }
.cmp-table td:first-child, .cmp-table th:first-child { text-align: left; }
.cmp-table .yes { color: var(--success); }
.cmp-table .no { color: var(--border); }
.cmp-table .hl-col { background: var(--brand-bg); }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: var(--brand-bg); }
.cta-band .container { text-align: center; padding-top: 72px; padding-bottom: 72px; }
.cta-band h2 { font-size: 32px; font-weight: 700; }
.cta-band p { color: var(--text-sub); margin: 12px 0 30px; }

/* ---------- 页脚 ---------- */
.footer {
  background: #FAFBFC; color: var(--text-sub); font-size: 13px;
  border-top: 1px solid rgba(45, 54, 66, .06);
}
.footer .footer-main {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr; gap: 32px;
  padding: 56px 0 40px;
}
.footer h4 { color: var(--text-main); font-size: 15px; font-weight: 400; margin-bottom: 18px; }
.footer .f-links { display: flex; flex-direction: column; gap: 10px; }
.footer a:hover { color: var(--brand); }
.footer .f-brand img { height: 34px; width: auto; }
.footer .f-brand p { margin-top: 14px; max-width: 300px; }
.footer .f-qr-group { display: flex; gap: 12px; align-items: flex-start; }
.footer .f-qr { flex: 1; min-width: 0; margin: 0; text-align: center; }
.footer .f-qr img {
  width: 100%; aspect-ratio: 1; object-fit: contain; background: #fff;
  border: 1px solid rgba(45, 54, 66, .14); border-radius: 10px; padding: 4px;
}
.footer .f-qr figcaption { margin-top: 8px; color: var(--text-main); font-size: 11px; line-height: 1.4; }
.footer .footer-bottom {
  width: 100vw; margin-left: calc(50% - 50vw); padding: 18px max(24px, calc((100vw - 1200px) / 2));
  background: linear-gradient(180deg, rgba(255, 255, 255, .6), rgba(255, 255, 255, 0) 55%),
              linear-gradient(110deg, #F3F6F9 0%, #EEF2F6 50%, #F1F4F8 100%);
  border-top: 1px solid rgba(45, 54, 66, .08); color: #2B2B2B; text-align: center;
}
.footer .footer-bottom a { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 首页维护提示 ---------- */
.maintenance-toast {
  position: fixed; right: 24px; bottom: 24px; z-index: 1200;
  max-width: calc(100vw - 48px); background: #EAF4FB; color: var(--danger);
  border: 1px solid #C7DDED; border-radius: 10px; box-shadow: var(--shadow-hover);
  padding: 18px 56px 18px 20px; font-size: 16px; line-height: 1.5;
}
.maintenance-toast.show { animation: maintenanceToastIn .25s ease-out; }
.maintenance-toast-close {
  position: absolute; right: 18px; top: 50%; color: var(--text-sub);
  font-size: 32px; font-weight: 300; line-height: 1; transform: translateY(-50%);
}
@keyframes maintenanceToastIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 登录弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .4); z-index: 1000;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-mask.open { display: flex; animation: maskIn .25s; }
@keyframes maskIn { from { opacity: 0; } to { opacity: 1; } }
.login-modal {
  width: 400px; max-width: 100%; background: #fff; border-radius: 16px;
  padding: 32px 34px 26px; position: relative; animation: modalIn .3s;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
.login-modal .lm-close {
  position: absolute; right: 16px; top: 14px; border: 0; background: none;
  font-size: 22px; color: var(--text-sub); line-height: 1;
}
.login-modal .lm-logo { display: flex; justify-content: center; margin-bottom: 22px; }
.login-modal .lm-logo img { height: 32px; width: auto; }
.lm-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.lm-tabs button {
  flex: 1; border: 0; background: none; padding: 10px 0; font-size: 15px; color: var(--text-sub);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.lm-tabs button.on { color: var(--brand); border-bottom-color: var(--brand); }
.lm-pane { display: none; }
.lm-pane.on { display: block; }
.lm-field { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 14px; }
.lm-field:focus-within { border-color: var(--brand); }
.lm-field .prefix {
  padding: 0 12px; display: flex; align-items: center; color: var(--text-sub);
  border-right: 1px solid var(--border); font-size: 14px; background: var(--bg-gray);
}
.lm-field input { flex: 1; border: 0; outline: 0; padding: 12px 14px; min-width: 0; }
.lm-field .code-btn {
  border: 0; background: none; color: var(--brand); font-size: 13px; padding: 0 14px; white-space: nowrap;
}
.lm-field .code-btn:disabled { color: var(--text-sub); cursor: not-allowed; }
.lm-error { color: var(--danger); font-size: 13px; min-height: 20px; margin: -6px 0 6px; }
.lm-qr {
  width: 200px; height: 200px; margin: 0 auto 14px; border: 1px solid var(--border); border-radius: 8px;
  position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.lm-qr svg { width: 176px; height: 176px; }
.lm-qr .qr-expired {
  position: absolute; inset: 0; background: rgba(255, 255, 255, .94); display: none;
  flex-direction: column; align-items: center; justify-content: center; gap: 10px; font-size: 14px;
}
.lm-qr.expired .qr-expired { display: flex; }
.lm-qr-tip { text-align: center; font-size: 14px; color: var(--text-sub); }
.lm-agree { display: flex; gap: 8px; font-size: 13px; color: var(--text-sub); margin-top: 18px; align-items: flex-start; }
.lm-agree input { margin-top: 4px; }
.lm-agree a { color: var(--brand); }
.lm-agree.shake { animation: shake .4s; color: var(--danger); }
@keyframes shake {
  0%, 100% { transform: translateX(0); } 25% { transform: translateX(-5px); }
  50% { transform: translateX(5px); } 75% { transform: translateX(-4px); }
}
.lm-hint {
  margin-top: 14px; background: var(--blue-bg); border-radius: 8px; padding: 8px 12px;
  font-size: 12px; color: var(--blue);
}

/* ---------- 帮助中心 FAQ ---------- */
.page-hero { background: linear-gradient(135deg, #fff, var(--brand-bg)); padding: 64px 0; text-align: center; }
.page-hero h1 { font-size: 40px; font-weight: 700; }
.page-hero p { color: var(--text-sub); margin-top: 12px; font-size: 17px; }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.faq-item summary {
  padding: 18px 24px; cursor: pointer; font-size: 16px; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .fi-arrow { color: var(--text-sub); transition: transform .25s; flex-shrink: 0; }
.faq-item[open] summary .fi-arrow { transform: rotate(180deg); }
.faq-item[open] summary { color: var(--brand); }
.faq-item .fi-body { padding: 0 24px 20px; color: var(--text-sub); font-size: 14px; }
.faq-cat { max-width: 860px; margin: 0 auto 12px; font-size: 18px; font-weight: 700; padding-top: 26px; }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.about-grid h2 { font-size: 28px; font-weight: 700; margin-bottom: 18px; }
.about-grid p { color: var(--text-sub); margin-bottom: 14px; font-size: 15px; }
.about-vals { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.about-val { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 26px; text-align: center; }
.about-val .av-num { font-size: 30px; margin-bottom: 12px; }
.about-val h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.about-val p { font-size: 13px; color: var(--text-sub); }
.contact-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-card { background: var(--bg-gray); border-radius: var(--radius); padding: 28px; text-align: center; }
.contact-card .cc-ico { font-size: 26px; margin-bottom: 10px; }
.contact-card h4 { font-size: 15px; font-weight: 400; margin-bottom: 6px; }
.contact-card p { font-size: 14px; color: var(--text-sub); }

/* ---------- 协议/隐私 法律页 ---------- */
.legal-wrap { max-width: 860px; margin: 0 auto; padding: 56px 24px 80px; }
.legal-wrap h1 { font-size: 30px; font-weight: 700; margin-bottom: 8px; }
.legal-wrap .l-meta { color: var(--text-sub); font-size: 13px; margin-bottom: 36px; }
.legal-wrap h2 { font-size: 19px; font-weight: 700; margin: 32px 0 12px; }
.legal-wrap p, .legal-wrap li { font-size: 15px; color: #3a3f47; margin-bottom: 10px; }
.legal-wrap ol { list-style: none; padding-left: 0; }
.legal-notice { background: var(--brand-bg); border-radius: 8px; padding: 14px 18px; font-size: 14px; color: var(--brand); margin-bottom: 24px; }

/* ---------- 流程演示弹层 ---------- */
.btn-plain { background: #fff; color: var(--text-main); border-color: var(--border); }
.btn-plain:hover { border-color: var(--brand); color: var(--brand); }
.btn-sm { padding: 5px 14px; font-size: 13px; border-radius: 6px; }
.demo-modal-mask {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .4); z-index: 1000;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.demo-modal-mask.open { display: flex; }
.demo-modal {
  background: #fff; border-radius: 16px; width: 720px; max-width: 100%;
  padding: 30px 34px; position: relative; animation: modalIn .3s;
}
.demo-modal .dm-close {
  position: absolute; top: 14px; right: 16px; border: 0; background: transparent;
  font-size: 26px; color: var(--text-sub); line-height: 1;
}
.demo-modal .dm-close:hover { color: var(--text-main); }
.dm-title { font-size: 19px; font-weight: 700; text-align: center; margin-bottom: 18px; }
.dm-steps { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 18px; }
.dm-steps span {
  font-size: 12px; color: var(--text-sub); padding: 4px 10px; border-radius: 999px;
  background: var(--bg-gray); cursor: pointer; transition: all .25s;
}
.dm-steps span.on { background: var(--brand); color: #fff; }
.dm-stage { min-height: 240px; position: relative; }
.dm-pane { display: none; }
.dm-pane.on { display: block; animation: modalIn .35s; }
.dm-upload {
  border: 2px dashed var(--border); border-radius: 12px; padding: 44px 20px;
  text-align: center; font-size: 15px; line-height: 2; color: var(--text-sub);
  background: var(--bg-gray);
}
.dm-upload small { font-size: 12px; }
.dm-rows { display: flex; flex-direction: column; gap: 10px; }
.dm-row {
  background: var(--bg-gray); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; font-size: 14px; display: flex; align-items: center; gap: 10px;
}
.dm-st { margin-left: auto; font-size: 12px; padding: 2px 10px; border-radius: 999px; background: #ECEDF0; color: var(--text-sub); flex-shrink: 0; }
.dm-st.ok { background: rgba(43,164,113,.12); color: var(--success); }
.dm-st.warn { background: rgba(230,162,60,.14); color: var(--warning); }
.dm-st.bad { background: rgba(213,73,65,.12); color: var(--danger); }
.dm-editor {
  background: var(--bg-gray); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px 22px; font-size: 14px; line-height: 2; min-height: 150px; color: var(--text-main);
}
.dm-caret { display: inline-block; width: 2px; height: 16px; background: var(--brand); vertical-align: -2px; animation: dsPulse .8s infinite; }
.dm-note { text-align: center; font-size: 12px; color: var(--text-sub); margin-top: 14px; }
.dm-foot { display: flex; gap: 10px; align-items: center; margin-top: 20px; }

/* ---------- 免注册体验流 try.html ---------- */
.try-wrap { max-width: 1080px; margin: 0 auto; padding: 40px 24px 80px; min-height: calc(100vh - 260px); }
.try-steps { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 40px; flex-wrap: wrap; }
.try-steps span[data-i] {
  display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-sub);
}
.try-steps span[data-i] i {
  width: 24px; height: 24px; border-radius: 50%; background: var(--bg-gray); border: 1px solid var(--border);
  display: inline-flex; align-items: center; justify-content: center; font-size: 12px; font-style: normal;
}
.try-steps span.on { color: var(--brand); }
.try-steps span.on i { background: var(--brand); border-color: var(--brand); color: #fff; }
.try-steps span.done { color: var(--success); }
.try-steps span.done i { background: rgba(43,164,113,.12); border-color: var(--success); color: var(--success); }
.try-steps .sep { color: var(--border); }
.try-pane { display: none; }
.try-pane.on { display: block; animation: modalIn .35s; }
.try-head { text-align: center; margin-bottom: 34px; }
.try-head h1 { font-size: 30px; font-weight: 700; }
.try-head p { color: var(--text-sub); margin-top: 10px; font-size: 15px; }
.try-upload {
  max-width: 640px; margin: 0 auto; border: 2px dashed var(--border); border-radius: 16px;
  background: #fff; padding: 56px 30px; text-align: center; cursor: pointer; transition: all .25s;
}
.try-upload:hover, .try-upload.over { border-color: var(--brand); background: var(--brand-bg); }
.try-upload .tu-ico { font-size: 42px; margin-bottom: 12px; }
.try-upload h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.try-upload p { font-size: 13px; color: var(--text-sub); margin-bottom: 12px; line-height: 1.9; }
.try-alt { text-align: center; margin-top: 22px; font-size: 14px; color: var(--text-sub); }
.try-alt a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.try-parsing { max-width: 560px; margin: 30px auto 0; text-align: center; }
.try-parsing .tp-file { font-size: 15px; margin: 14px 0 20px; }
.tp-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.tp-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--brand), var(--brand-hover)); border-radius: 4px; transition: width .8s ease; }
.tp-stage { font-size: 14px; color: var(--brand); margin-top: 14px; min-height: 22px; }
.tp-list { margin: 26px auto 0; max-width: 380px; text-align: left; display: flex; flex-direction: column; gap: 10px; }
.tp-list li { font-size: 13px; color: var(--text-sub); padding-left: 26px; position: relative; opacity: .5; transition: opacity .4s; }
.tp-list li::before { content: "○"; position: absolute; left: 4px; color: var(--border); }
.tp-list li.done { opacity: 1; }
.tp-list li.done::before { content: "✓"; color: var(--success); }
.try-result { display: grid; grid-template-columns: 300px 1fr; gap: 26px; align-items: start; }
.tr-side {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 22px; position: sticky; top: 84px;
}
.tr-side h4 { font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.tr-kv { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; padding: 6px 0; border-bottom: 1px dashed var(--border); }
.tr-kv span { color: var(--text-sub); flex-shrink: 0; }
.tr-kv b { font-weight: 400; text-align: right; }
.tr-sec { margin-top: 16px; }
.tr-sec h5 { font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.tr-sec p { font-size: 12px; color: var(--text-sub); margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.tr-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.tr-dot.r { background: var(--danger); }
.tr-dot.y { background: var(--warning); }
.tr-lock { color: var(--brand) !important; margin-top: 8px; }
.tr-toc { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; }
.tr-toc h4 { font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.tr-toc ol { display: flex; flex-direction: column; gap: 10px; }
.tr-toc li { font-size: 14px; display: flex; justify-content: space-between; gap: 14px; padding: 9px 14px; background: var(--bg-gray); border-radius: 8px; }
.tr-toc li small { color: var(--text-sub); flex-shrink: 0; }
.tr-toc-note { font-size: 12px; color: var(--success); margin-top: 12px; }
.tr-pages { display: flex; flex-direction: column; gap: 16px; position: relative; }
.tr-page {
  background: #fff; border: 1px solid var(--border); border-radius: 4px;
  padding: 30px 36px; box-shadow: var(--shadow-card); font-size: 14px; line-height: 2;
}
.tr-page h5 { font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.tr-page p { margin-bottom: 10px; color: #3a3f47; }
.tr-page .tr-pageno { text-align: center; font-size: 11px; color: var(--text-sub); margin-top: 14px; }
.tr-page.fade { position: relative; max-height: 240px; overflow: hidden; }
.tr-page.fade::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 150px;
  background: linear-gradient(transparent, #fff 82%);
}
.score-chip {
  display: inline-block; background: rgba(43,164,113,.1); color: var(--success);
  font-size: 11px; padding: 1px 8px; border-radius: 4px; margin-left: 6px; line-height: 1.6; vertical-align: 1px;
}
.tr-unlock {
  margin-top: 26px; text-align: center; background: linear-gradient(135deg, var(--brand-bg), #fff);
  border: 1px solid #F3D9CB; border-radius: 16px; padding: 36px 26px;
}
.tr-unlock .tru-ico { font-size: 34px; margin-bottom: 8px; }
.tr-unlock h3 { font-size: 21px; font-weight: 700; margin-bottom: 8px; }
.tr-unlock p { font-size: 14px; color: var(--text-sub); }
.tr-unlock .tru-btns { display: flex; gap: 14px; justify-content: center; margin-top: 22px; flex-wrap: wrap; }
.tr-unlock .tru-tip { font-size: 13px; color: var(--brand); margin-top: 16px; }
.try-disclaim { text-align: center; font-size: 12px; color: var(--text-sub); margin-top: 30px; }

/* ---------- 滚动浮现动效 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .5s, transform .5s; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1279px) {
  .feature-grid, .usp-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-band { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .step-node:nth-child(4)::before { display: none; }
  .hero .container { flex-direction: column; }
  .hero-left { flex: none; text-align: center; }
  .hero-tags, .hero-cta { justify-content: center; }
  .footer .footer-main { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .section { padding: 56px 0; }
  .hero-left h1 { font-size: 32px; }
  .section-head h2, .cta-band h2 { font-size: 24px; }
  .nav-links, .nav-actions .btn-outline { display: none; }
  .nav-burger { display: block; }
  .nav-links.mobile-open {
    display: flex; position: fixed; top: 96px; left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0; padding: 8px 0;
    border-bottom: 1px solid var(--border); z-index: 899;
  }
  .nav-links.mobile-open a { padding: 14px 28px; border-bottom: 0; }
  .feature-grid, .usp-grid, .compare-grid, .price-grid, .about-vals,
  .contact-strip, .about-grid, .booster-grid { grid-template-columns: 1fr; }
  .price-card.popular { transform: none; }
  .trial-banner { flex-direction: column; align-items: flex-start; padding: 22px 22px; }
  .trial-banner .tb-left { flex-direction: column; align-items: flex-start; gap: 12px; }
  .trial-banner .tb-right { width: 100%; justify-content: space-between; }
  .booster-card { flex-wrap: wrap; }
  .try-result { grid-template-columns: 1fr; }
  .tr-side { position: static; }
  .tr-page { padding: 22px 20px; }
  .demo-modal { padding: 24px 18px; }
  .dm-foot { flex-wrap: wrap; }
  .dm-foot .btn-primary { margin-left: 0 !important; width: 100%; }
  .steps-band { grid-template-columns: repeat(2, 1fr); }
  .step-node:nth-child(odd)::before { display: none; }
  .stats-row { gap: 40px; }
  .trust-box { padding: 36px 24px; }
  .footer .footer-main { grid-template-columns: 1fr; }
  .modal-mask { padding: 0; align-items: stretch; }
  .login-modal { width: 100%; border-radius: 0; display: flex; flex-direction: column; justify-content: center; }
}