/* ============================================================
   灵词AI · 全局样式（Design Tokens 严格按规格书）
   ============================================================ */
:root {
  --primary: #6D5DF0;
  --primary-deep: #5A48E8;
  --violet: #8A7BF5;
  --gold: #C9A24B; --gold-2: #A9843A; --gold-dim: rgba(201,162,75,.45); --gold-bg: rgba(201,162,75,.10);
  --grad: linear-gradient(135deg, #8A7BF5 0%, #5A48E8 100%);
  --success: #52C41A;
  --danger: #FF4D4F;
  --bg: #F5F6FA;
  --card: #FFFFFF;
  --text: #23263A;
  --text-2: #5F6478;
  --text-3: #9AA0B4;
  --border: rgba(30,35,60,.10);
  --radius-card: 16px;
  --radius-lg: 20px;
  --radius-btn: 10px;
  --shadow: 0 4px 24px rgba(31, 35, 41, .06);
  --shadow-main: 0 10px 30px rgba(109, 93, 240, .18);
  --font: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", "SimSun", Georgia, serif;
  --mono: "SF Mono", Consolas, "Courier New", monospace;
}
.logo, .hero-title, .section-title, .panel-title { letter-spacing: 1px; }
body { letter-spacing: .2px; }

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-title { font-size: 30px; font-weight: 800; letter-spacing: -.5px; }
.section-sub { margin-top: 10px; color: var(--text-2); font-size: 15px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; min-height: 44px; padding: 0 22px;
  border-radius: var(--radius-btn); font-size: 15px; font-weight: 600;
  transition: transform .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad); color: #fff;
  box-shadow: var(--shadow-main);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(109, 93, 240, .26); }
.btn-ghost {
  background: #fff; color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-ghost:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-lg { min-height: 52px; padding: 0 30px; font-size: 16px; border-radius: 14px; }

/* ---------- 顶栏 ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid rgba(232, 236, 243, .8);
  transition: box-shadow .25s ease;
}
.navbar.scrolled { box-shadow: 0 6px 20px rgba(31, 35, 41, .07); }
.navbar-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 20px;
  height: 62px; display: flex; align-items: center; gap: 24px;
}
.logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 800; flex-shrink: 0; }
.logo-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--grad); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800;
  box-shadow: 0 4px 12px rgba(109, 93, 240, .3);
}
.logo-ai {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 26px; margin-left: 8px; flex: 1; }
.nav-links a { font-size: 14.5px; color: var(--text-2); transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.nav-login { font-size: 14.5px; color: var(--text-2); min-height: 44px; display: inline-flex; align-items: center; }
.nav-login:hover { color: var(--primary); }
.nav-register { min-height: 40px; padding: 0 18px; font-size: 14px; }

/* ---------- Hero ---------- */
.hero {
  padding: 150px 0 30px;
  text-align: center;
  background:
    radial-gradient(600px 320px at 50% -80px, rgba(109, 93, 240, .1), transparent 70%),
    radial-gradient(500px 300px at 85% 40px, rgba(138, 123, 245, .08), transparent 70%),
    var(--bg);
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 100px;
  background: #fff; border: 1px solid var(--border);
  font-size: 13px; color: var(--text-2);
  box-shadow: var(--shadow);
}
.hero-badge i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--grad); flex-shrink: 0;
}
.hero-title {
  margin: 26px auto 0; max-width: 760px;
  font-size: 44px; font-weight: 800; line-height: 1.25;
  letter-spacing: -1px;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  margin: 18px auto 0; max-width: 640px;
  color: var(--text-2); font-size: 16px; line-height: 1.8;
}
.hero-actions {
  margin-top: 30px;
  display: flex; justify-content: center; gap: 14px; flex-wrap: wrap;
}
.hero-note {
  margin: 18px auto 0; max-width: 600px;
  font-size: 13px; color: var(--text-3);
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 100px;
  background: rgba(109, 93, 240, .05);
  border: 1px dashed rgba(109, 93, 240, .25);
}

/* ---------- 四步演示卡（全站最精致组件） ---------- */
.demo-section { padding: 36px 0 64px; }
.demo-card {
  position: relative;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(109, 93, 240, .14), 0 4px 16px rgba(31, 35, 41, .05);
  padding: 36px 34px 30px;
  border: 1px solid rgba(232, 236, 243, .9);
  overflow: hidden;
}
.demo-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: var(--grad);
}
.demo-steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin-bottom: 30px;
}
.demo-step {
  position: relative;
  background: #FAFBFE;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 14px 16px;
  text-align: center;
  transition: transform .2s ease, box-shadow .2s ease;
}
.demo-step:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.step-num {
  width: 34px; height: 34px; margin: 0 auto 10px;
  border-radius: 50%; background: var(--grad); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 800;
  box-shadow: 0 6px 14px rgba(109, 93, 240, .3);
}
.step-title { font-size: 14.5px; font-weight: 700; }
.step-desc { font-size: 12.5px; color: var(--text-3); margin-top: 3px; }
.step-arrow {
  position: absolute; top: 50%; right: -13px; transform: translateY(-50%);
  color: var(--primary); font-size: 14px; z-index: 2;
  background: #fff; border-radius: 50%;
  width: 22px; height: 22px; line-height: 22px;
  box-shadow: var(--shadow);
}
.demo-result {
  background: #F5F7FE;
  border: 1px solid #E4E9FB;
  border-radius: var(--radius-card);
  overflow: hidden;
}
.demo-result-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 13px 18px;
  background: #fff; border-bottom: 1px solid #E4E9FB;
}
.demo-result-title { font-size: 13.5px; font-weight: 700; color: var(--text-2); display: flex; align-items: center; gap: 7px; }
.demo-result-title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); }
.copy-btn {
  display: inline-flex; align-items: center; gap: 5px;
  min-height: 36px; padding: 0 14px;
  border-radius: 9px; font-size: 13px; font-weight: 600;
  background: var(--grad); color: #fff;
  box-shadow: 0 6px 16px rgba(109, 93, 240, .22);
  transition: transform .2s ease, background .25s ease;
}
.copy-btn:hover { transform: translateY(-2px); }
.copy-btn.copied { background: var(--success); box-shadow: 0 6px 16px rgba(82, 196, 26, .3); }
.demo-prompt {
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 13.5px; line-height: 1.9; color: #343B4C;
}
.demo-meta { padding: 0 20px 18px; display: grid; gap: 10px; }
.meta-row { display: flex; gap: 8px; align-items: flex-start; flex-wrap: wrap; }
.meta-label {
  flex-shrink: 0; font-size: 12px; font-weight: 700; color: var(--primary);
  background: rgba(109, 93, 240, .08); border-radius: 6px;
  padding: 3px 8px; margin-top: 1px;
}
.meta-tags { display: flex; gap: 7px; flex-wrap: wrap; }
.meta-tag {
  font-size: 12px; color: var(--text-2);
  background: #fff; border: 1px solid var(--border);
  border-radius: 100px; padding: 4px 11px;
}

/* ---------- 信任条 ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.trust-card {
  background: var(--card); border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 26px 20px; text-align: center;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}
.trust-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(31, 35, 41, .1); }
.trust-icon { font-size: 30px; margin-bottom: 12px; }
.trust-title { font-size: 16px; font-weight: 800; }
.trust-desc { margin-top: 6px; font-size: 13px; color: var(--text-2); line-height: 1.7; }

/* ---------- 热门场景 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 26px; }
.scene-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px 14px 20px; text-align: center;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.scene-card:hover {
  transform: translateY(-4px);
  border-color: rgba(109, 93, 240, .4);
  box-shadow: 0 12px 32px rgba(109, 93, 240, .12);
}
.scene-icon {
  width: 52px; height: 52px; margin: 0 auto 12px;
  border-radius: 14px; font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(109, 93, 240, .1), rgba(138, 123, 245, .1));
}
.scene-name { font-size: 15px; font-weight: 800; }
.scene-tags { margin-top: 5px; font-size: 12px; color: var(--text-3); }
.scene-input-demo {
  display: flex; align-items: center; gap: 10px;
  border: 1.5px dashed rgba(109, 93, 240, .45);
  background: rgba(109, 93, 240, .04);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  font-size: 14px; color: var(--text-2);
}
.scene-input-demo .kbd {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 3px 10px; font-size: 13px; color: var(--primary); font-weight: 600;
  box-shadow: var(--shadow); white-space: nowrap;
}

/* ---------- 对比表 ---------- */
.compare-wrap {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  overflow: hidden;
}
.compare-row {
  display: grid; grid-template-columns: 1.1fr 1.4fr 1.4fr;
  border-bottom: 1px solid var(--border);
}
.compare-row:last-child { border-bottom: none; }
.compare-row.head { background: #FAFBFE; font-weight: 800; font-size: 15px; }
.compare-row.head .c-us { color: var(--primary); }
.compare-cell { padding: 17px 20px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.c-label { color: var(--text-2); font-weight: 600; }
.c-old { color: var(--text-3); background: #FBFCFE; }
.c-old .mark { color: var(--danger); font-weight: 800; flex-shrink: 0; }
.c-us { color: var(--primary); font-weight: 600; background: linear-gradient(135deg, rgba(109, 93, 240, .06), rgba(138, 123, 245, .05)); }
.c-us .mark { color: var(--success); font-weight: 800; flex-shrink: 0; }

/* ---------- 定价 ---------- */
.price-grid {
  display: grid; grid-template-columns: 1fr 1.12fr 1fr; gap: 18px;
  align-items: stretch;
}
.price-card {
  position: relative;
  background: var(--card); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 26px 26px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
  display: flex; flex-direction: column;
}
.price-card:hover { transform: translateY(-4px); box-shadow: 0 14px 40px rgba(31, 35, 41, .1); }
.price-card.hot {
  border: 2px solid transparent;
  background:
    linear-gradient(#fff, #fff) padding-box,
    var(--grad) border-box;
  box-shadow: 0 20px 50px rgba(109, 93, 240, .2);
  transform: scale(1.045);
  z-index: 2;
}
.price-card.hot:hover { transform: scale(1.045) translateY(-4px); }
.hot-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #D8B25C, #B8863B); color: #fff;
  font-size: 12.5px; font-weight: 700;
  padding: 5px 16px; border-radius: 100px;
  box-shadow: 0 8px 18px rgba(184, 134, 59, .35);
  white-space: nowrap;
}
.price-name { font-size: 16px; font-weight: 800; color: var(--text-2); }
.price-card.hot .price-name { color: var(--primary); }
.price-num {
  margin: 14px 0 2px;
  font-size: 42px; font-weight: 800; letter-spacing: -1px;
}
.price-num .yuan { font-size: 20px; font-weight: 700; margin-right: 2px; }
.price-card.hot .price-num {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.price-times { font-size: 14px; color: var(--text-2); }
.price-times b { color: var(--text); font-size: 16px; }
.price-note {
  display: inline-block; margin: 12px auto 0;
  font-size: 12px; color: var(--text-3);
  background: #F5F7FB; border-radius: 100px; padding: 4px 12px;
}
.price-card.hot .price-note { color: var(--primary); background: rgba(109, 93, 240, .08); }
.price-feats { list-style: none; margin: 18px 0 22px; text-align: left; display: grid; gap: 9px; flex: 1; }
.price-feats li { font-size: 13.5px; color: var(--text-2); display: flex; gap: 7px; align-items: flex-start; }
.price-feats li::before { content: "✓"; color: var(--success); font-weight: 800; flex-shrink: 0; }
.price-btn { width: 100%; }
.price-foot-note { text-align: center; margin-top: 22px; font-size: 13.5px; color: var(--text-2); }
.price-foot-note b { color: var(--primary); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color .2s ease;
}
.faq-item.open { border-color: rgba(109, 93, 240, .4); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  gap: 14px; padding: 18px 22px; min-height: 44px;
  font-size: 15px; font-weight: 700; text-align: left; color: var(--text);
}
.faq-q .arrow {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
  background: rgba(109, 93, 240, .08); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; transition: transform .25s ease;
}
.faq-item.open .arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a-inner {
  padding: 0 22px 20px;
  font-size: 14px; color: var(--text-2); line-height: 1.8;
}

/* ---------- 底部行动条 ---------- */
.cta-banner {
  border-radius: var(--radius-lg);
  background: var(--grad);
  box-shadow: 0 20px 50px rgba(109, 93, 240, .28);
  padding: 48px 30px;
  text-align: center; color: #fff;
  position: relative; overflow: hidden;
}
.cta-banner::before, .cta-banner::after {
  content: ""; position: absolute; border-radius: 50%;
  background: rgba(255, 255, 255, .12);
}
.cta-banner::before { width: 220px; height: 220px; top: -110px; right: -60px; }
.cta-banner::after { width: 160px; height: 160px; bottom: -90px; left: -40px; }
.cta-title { font-size: 30px; font-weight: 800; position: relative; }
.cta-sub { margin-top: 10px; font-size: 15px; opacity: .92; position: relative; }
.cta-btn {
  position: relative; margin-top: 26px;
  background: #fff; color: var(--primary);
  min-height: 52px; padding: 0 34px; font-size: 16px; font-weight: 700;
  border-radius: 14px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .16);
  display: inline-flex; align-items: center;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 14px 32px rgba(0, 0, 0, .2); }

/* ---------- 页脚 ---------- */
.footer { background: #fff; border-top: 1px solid var(--border); padding: 44px 0 30px; }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.footer-brand { max-width: 300px; }
.footer-slogan {
  margin-top: 12px; font-size: 14px; font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-desc { margin-top: 8px; font-size: 13px; color: var(--text-3); }
.footer-links { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h4 { font-size: 14px; font-weight: 800; margin-bottom: 12px; }
.footer-col a { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 9px; min-height: 24px; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  margin-top: 34px; padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center; font-size: 12.5px; color: var(--text-3);
}

/* ============================================================
   应用内页面（生成工具 / 登录 / 兑换 / 记录等）
   ============================================================ */
.app-body { padding-top: 62px; min-height: 100vh; display: flex; flex-direction: column; }
.app-container { max-width: 1120px; margin: 0 auto; padding: 24px 20px 60px; width: 100%; flex: 1; }

/* 应用顶栏用户区 */
.user-chip { display: flex; align-items: center; gap: 10px; }
.user-avatar {
  width: 32px; height: 32px; border-radius: 50%; background: var(--grad);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; flex-shrink: 0;
}
.balance-pill {
  background: rgba(109, 93, 240, .08); color: var(--primary); font-weight: 700;
  border-radius: 100px; padding: 6px 14px; font-size: 13.5px; white-space: nowrap;
}

/* 模式切换标签页 */
.mode-tabs {
  display: flex; gap: 8px; background: #fff; border: 1px solid var(--border);
  border-radius: 14px; padding: 5px; margin-bottom: 8px; box-shadow: var(--shadow);
}
.mode-tab {
  flex: 1; min-height: 46px; border-radius: 10px; font-size: 15px; font-weight: 700;
  color: var(--text-2); transition: all .2s ease; display: flex; align-items: center; justify-content: center;
}
.mode-tab:hover { color: var(--primary); }
.mode-tab.active { background: var(--grad); color: #fff; box-shadow: 0 6px 14px rgba(109, 93, 240, .25); }
.mode-hint { text-align: center; font-size: 12.5px; color: var(--text-3); margin-bottom: 18px; }

/* 工具页双栏 */
.tool-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: 20px; align-items: start; }
.panel {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 26px 24px;
}
.panel-title { font-size: 17px; font-weight: 800; }
.panel-sub { font-size: 13px; color: var(--text-3); margin: 5px 0 18px; }
.gen-textarea {
  width: 100%; min-height: 108px; border: 1.5px solid var(--border);
  border-radius: 14px; padding: 14px 16px; font-family: var(--font);
  font-size: 15px; color: var(--text); outline: none; resize: vertical;
  transition: border-color .2s ease; background: #fff;
}
.gen-textarea:focus { border-color: var(--primary); }
.gen-textarea::placeholder { color: var(--text-3); }
.chip-label { display: block; font-size: 12.5px; font-weight: 700; color: var(--text-3); margin: 16px 0 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: #F5F7FB; border: 1px solid var(--border); border-radius: 100px;
  padding: 8px 16px; min-height: 36px; font-size: 13.5px; color: var(--text-2);
  transition: all .18s ease; display: inline-flex; align-items: center;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 6px 14px rgba(109, 93, 240, .25); }
.gen-btn { width: 100%; margin-top: 20px; }
.gen-hint { margin-top: 12px; font-size: 12.5px; color: var(--text-3); text-align: center; }

/* 结果面板 */
.result-empty { text-align: center; padding: 64px 20px; color: var(--text-3); }
.result-empty .ic { font-size: 46px; margin-bottom: 14px; }
.result-empty .t { font-size: 15px; font-weight: 700; color: var(--text-2); margin-bottom: 6px; }
.result-empty .s { font-size: 13px; }
.refine-row { display: flex; gap: 10px; margin-top: 18px; }
.refine-input {
  flex: 1; min-height: 46px; border: 1.5px solid var(--border); border-radius: 12px;
  padding: 0 14px; font-size: 14px; font-family: var(--font); color: var(--text); outline: none; background: #fff;
}
.refine-input:focus { border-color: var(--primary); }
.refine-btn { min-height: 46px; padding: 0 18px; }
.refine-btn:disabled { opacity: .5; cursor: not-allowed; }
.rounds-left { margin-top: 10px; font-size: 12.5px; color: var(--text-3); text-align: right; }
.satisfy-row { margin-top: 18px; display: flex; gap: 10px; align-items: center; }
.satisfy-row .sl { font-size: 13px; color: var(--text-3); margin-right: 4px; }
.satisfy-btn {
  border: 1px solid var(--border); border-radius: 100px; padding: 8px 16px;
  min-height: 38px; font-size: 13.5px; color: var(--text-2); transition: all .18s ease;
}
.satisfy-btn:hover { border-color: var(--primary); color: var(--primary); }
.satisfy-btn.picked { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 6px 14px rgba(109, 93, 240, .22); }

/* 弹窗（次数用尽等） */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15, 20, 35, .5);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  z-index: 200; display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-mask.show { display: flex; }
.modal-card {
  background: #fff; border-radius: 20px; max-width: 400px; width: 100%;
  padding: 30px 26px 26px; text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .22);
  animation: modalUp .25s ease;
}
@keyframes modalUp { from { transform: translateY(16px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal-icon { font-size: 42px; margin-bottom: 12px; }
.modal-title { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.modal-desc { font-size: 14px; color: var(--text-2); line-height: 1.7; margin-bottom: 22px; }
.modal-actions { display: flex; flex-direction: column; gap: 10px; }
.modal-note { margin-top: 14px; font-size: 12.5px; color: var(--text-3); }

/* 新手引导浮层 */
.guide-mask {
  position: fixed; inset: 0; background: rgba(15, 20, 35, .62); z-index: 300;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.guide-mask.show { display: flex; }
.guide-card {
  background: #fff; border-radius: 20px; max-width: 430px; width: 100%;
  padding: 32px 28px 26px; text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .25);
}
.guide-title { font-size: 20px; font-weight: 800; }
.guide-sub { font-size: 13.5px; color: var(--text-3); margin-top: 6px; }
.guide-steps { display: grid; gap: 14px; margin: 22px 0 26px; text-align: left; }
.guide-step { display: flex; gap: 12px; align-items: flex-start; }
.guide-num {
  width: 28px; height: 28px; border-radius: 50%; background: var(--grad); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800; flex-shrink: 0; margin-top: 1px;
}
.guide-step .gt { font-size: 14px; font-weight: 700; }
.guide-step .gs { font-size: 12.5px; color: var(--text-3); margin-top: 2px; line-height: 1.6; }

/* 登录 / 注册 */
.auth-wrap {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 40px 20px;
  background:
    radial-gradient(600px 320px at 50% -60px, rgba(109, 93, 240, .12), transparent 70%),
    radial-gradient(500px 300px at 85% 20px, rgba(138, 123, 245, .08), transparent 70%),
    var(--bg);
}
.auth-card {
  background: #fff; border-radius: 20px; width: 100%; max-width: 400px;
  padding: 38px 32px 30px; border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(109, 93, 240, .12);
}
.auth-logo { display: flex; justify-content: center; margin-bottom: 10px; }
.auth-title { text-align: center; font-size: 20px; font-weight: 800; }
.auth-sub { text-align: center; font-size: 13px; color: var(--text-3); margin: 6px 0 26px; }
.form-label { display: block; font-size: 13px; font-weight: 700; color: var(--text-2); margin-bottom: 7px; }
.form-field { margin-bottom: 16px; }
.form-input {
  width: 100%; min-height: 48px; border: 1.5px solid var(--border); border-radius: 12px;
  padding: 0 16px; font-size: 15px; font-family: var(--font); color: var(--text);
  outline: none; background: #fff; transition: border-color .2s ease;
}
.form-input:focus { border-color: var(--primary); }
.form-input::placeholder { color: var(--text-3); }
.form-input.err { border-color: var(--danger); }
.code-row { display: flex; gap: 10px; }
.code-row .form-input { flex: 1; }
.code-btn {
  min-width: 118px; min-height: 48px; border: 1.5px solid var(--primary); color: var(--primary);
  border-radius: 12px; font-size: 13.5px; font-weight: 600; background: #fff; transition: all .18s;
}
.code-btn:disabled { border-color: var(--border); color: var(--text-3); cursor: not-allowed; }
.auth-agree { display: flex; gap: 8px; align-items: flex-start; font-size: 12.5px; color: var(--text-3); margin: 6px 0 22px; }
.auth-agree input { margin-top: 3px; accent-color: var(--primary); }
.auth-agree a { color: var(--primary); }
.auth-submit { width: 100%; }
.auth-foot { text-align: center; margin-top: 18px; font-size: 13px; color: var(--text-3); }
.auth-foot a { color: var(--primary); }

/* 响应式补充 */
@media (max-width: 900px) {
  .tool-layout { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .app-container { padding: 16px 14px 44px; }
  .panel { padding: 20px 16px; }
  .code-btn { min-width: 104px; font-size: 12.5px; }
}
@media (max-width: 1024px) {
  .demo-steps { grid-template-columns: repeat(2, 1fr); }
  .step-arrow { display: none; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .section { padding: 40px 0; }
  .section-title { font-size: 24px; }
  .section-sub { font-size: 14px; }
  .nav-links { display: none; }
  .navbar-inner { height: 56px; }
  .hero { padding: 108px 0 20px; }
  .hero-title { font-size: 29px; letter-spacing: -.5px; }
  .hero-sub { font-size: 14.5px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-note { font-size: 12px; line-height: 1.6; }
  .demo-card { padding: 24px 16px 20px; }
  .demo-steps { gap: 10px; }
  .demo-step { padding: 14px 8px 12px; }
  .step-title { font-size: 13px; }
  .step-desc { font-size: 11.5px; }
  .demo-prompt { font-size: 12.5px; padding: 14px 14px; }
  .demo-meta { padding: 0 14px 14px; }
  .scene-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .scene-card { padding: 18px 10px 14px; }
  .compare-row { grid-template-columns: 1fr 1.3fr 1.3fr; }
  .compare-cell { padding: 13px 10px; font-size: 12.5px; }
  .price-grid { grid-template-columns: 1fr; gap: 20px; }
  .price-card.hot { transform: none; order: -1; }
  .price-card.hot:hover { transform: translateY(-4px); }
  .cta-banner { padding: 38px 20px; }
  .cta-title { font-size: 23px; }
  .footer-inner { flex-direction: column; gap: 22px; }
  .footer-links { gap: 34px; }
}