/* ============================================================
   艾咔AICUT 官网 - 设计系统（深色科技风）
   品牌色可在此处统一修改（--primary / --primary-2）
   ============================================================ */
:root {
  --primary: #6366f1;
  --primary-2: #8b5cf6;
  --primary-soft: rgba(99,102,241,.12);
  --accent: #22d3ee;
  --accent-2: #06b6d4;
  --ink: #f1f5f9;
  --ink-2: #cbd5e1;
  --ink-3: #94a3b8;
  --line: rgba(148,163,184,.15);
  --line-light: rgba(148,163,184,.08);
  --bg: #0a0f1e;
  --bg-soft: #111827;
  --bg-card: rgba(17,24,39,.7);
  --bg-card-hover: rgba(30,41,59,.8);
  --danger: #ef4444;
  --success: #10b981;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,.4);
  --shadow-lg: 0 16px 48px rgba(99,102,241,.2);
  --glow: 0 0 40px rgba(99,102,241,.15);
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  --container: 1140px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,15,30,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav {
  position: relative;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; letter-spacing: .5px; }
.brand .mark { width: 32px; height: 32px; }
.brand em { font-style: normal; color: var(--accent); }

.nav-links { display: flex; align-items: center; gap: 4px; }
@media (min-width: 721px) {
  .nav-links {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}
.nav-links a {
  padding: 7px 16px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--ink-2); transition: all .2s;
}
.nav-links a:hover { color: var(--accent); background: var(--primary-soft); }
.nav-links a.active {
  background: var(--gradient);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(99,102,241,.35);
}
.nav-links a.active:hover { background: var(--gradient); color: #fff; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 26px; border-radius: var(--radius-sm); border: none; cursor: pointer;
  font-size: 15px; font-weight: 600; font-family: var(--font);
  transition: all .2s; white-space: nowrap;
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 4px 16px rgba(99,102,241,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(99,102,241,.45); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary-soft); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border: 1.5px solid rgba(255,255,255,.2); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }
.btn-accent { background: var(--gradient-accent); color: #0a0f1e; font-weight: 700; }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(34,211,238,.3); }
.btn-lg { padding: 15px 36px; font-size: 17px; border-radius: 14px; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle svg { width: 24px; height: 24px; stroke: var(--ink-2); }

/* ---------- 页面区块 ---------- */
.section { padding: 80px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { max-width: 640px; margin: 0 auto 56px; text-align: center; }
.section-head .eyebrow {
  display: inline-block; padding: 4px 16px; border-radius: 999px;
  background: var(--primary-soft); color: var(--accent);
  font-size: 13px; font-weight: 600; margin-bottom: 14px;
  border: 1px solid rgba(99,102,241,.2);
}
.section-head h2 { font-size: 32px; line-height: 1.35; margin-bottom: 14px; color: #fff; }
.section-head h2 em { font-style: normal; color: var(--accent); }
.section-head p { color: var(--ink-3); font-size: 16px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(99,102,241,.18), transparent 60%),
    radial-gradient(700px 400px at 10% 100%, rgba(34,211,238,.10), transparent 60%),
    var(--bg);
  padding: 90px 0 80px;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  font-size: 13px; font-weight: 600; color: var(--accent); margin-bottom: 20px;
}
.hero .badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: .4; } }
.hero h1 { font-size: 46px; line-height: 1.2; letter-spacing: -1px; margin-bottom: 18px; color: #fff; }
.hero h1 span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero h1 em { font-style: normal; background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: 17px; color: var(--ink-3); margin-bottom: 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { position: relative; }

/* 数据条 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 18px; text-align: center; backdrop-filter: blur(8px);
}
.stat .num { font-size: 30px; font-weight: 800; background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .label { font-size: 13px; color: var(--ink-3); margin-top: 4px; }

/* ---------- 卡片 ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; backdrop-filter: blur(8px);
  transition: all .25s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(99,102,241,.35); box-shadow: var(--glow); }
.card .icon {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 16px;
  background: var(--primary-soft); display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(99,102,241,.2);
}
.card .icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 18px; margin-bottom: 10px; color: #fff; }
.card p { font-size: 14px; color: var(--ink-3); }
.card .more { display: inline-block; margin-top: 14px; color: var(--accent); font-size: 14px; font-weight: 600; }
.card .more:hover { text-decoration: underline; }

/* 痛点卡片特殊样式 */
.pain-card {
  background: var(--bg-card); border: 1px solid rgba(239,68,68,.15); border-radius: var(--radius);
  padding: 28px 24px; backdrop-filter: blur(8px);
  transition: all .25s;
}
.pain-card:hover { border-color: rgba(239,68,68,.35); box-shadow: 0 0 30px rgba(239,68,68,.1); }
.pain-card .pain-num {
  width: 36px; height: 36px; border-radius: 10px; margin-bottom: 16px;
  background: rgba(239,68,68,.12); display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: #ef4444;
}
.pain-card h3 { font-size: 18px; margin-bottom: 10px; color: #fca5a5; }
.pain-card p { font-size: 14px; color: var(--ink-3); }
.pain-card .pain-data { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.pain-card .pain-data dt { font-size: 12px; color: var(--ink-3); }
.pain-card .pain-data dd { font-size: 16px; font-weight: 700; color: #fca5a5; }

/* 流程步骤 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 20px; text-align: center; backdrop-filter: blur(8px);
  position: relative;
}
.step .step-num {
  width: 40px; height: 40px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--gradient); display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: #fff;
}
.step h3 { font-size: 16px; margin-bottom: 8px; color: #fff; }
.step p { font-size: 13px; color: var(--ink-3); }
.step::after {
  content: "→"; position: absolute; right: -12px; top: 40%; font-size: 20px; color: var(--primary);
}
.step:last-child::after { display: none; }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  background: var(--gradient); border-radius: 22px;
  padding: 56px 44px; text-align: center; color: #fff;
  position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(400px 200px at 90% 0%, rgba(255,255,255,.18), transparent 60%);
}
.cta-banner h2 { font-size: 30px; margin-bottom: 12px; position: relative; }
.cta-banner p { opacity: .9; margin-bottom: 28px; position: relative; }
.cta-banner .btn { position: relative; }

/* ---------- 内页头部 ---------- */
.page-hero {
  background:
    radial-gradient(600px 280px at 80% -20%, rgba(99,102,241,.12), transparent 60%),
    radial-gradient(400px 200px at 10% 100%, rgba(34,211,238,.08), transparent 60%),
    var(--bg);
  padding: 64px 0 48px; text-align: center; border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: 36px; margin-bottom: 12px; color: #fff; }
.page-hero h1 em { font-style: normal; color: var(--accent); }
.page-hero p { color: var(--ink-3); font-size: 16px; max-width: 560px; margin: 0 auto; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.about-grid .text h2 { font-size: 28px; margin-bottom: 16px; color: #fff; }
.about-grid .text p { color: var(--ink-2); font-size: 15px; margin-bottom: 12px; }

.value-list { display: grid; gap: 16px; }
.value-item { display: flex; gap: 14px; align-items: flex-start; }
.value-item .vi-icon {
  flex: none; width: 40px; height: 40px; border-radius: 10px;
  background: var(--gradient); color: #fff; display: flex; align-items: center; justify-content: center;
}
.value-item .vi-icon svg { width: 20px; height: 20px; }
.value-item h3 { font-size: 16px; margin-bottom: 4px; color: #fff; }
.value-item p { font-size: 13.5px; color: var(--ink-3); }

/* 创始人卡片 */
.founder-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.founder-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; text-align: center; backdrop-filter: blur(8px);
}
.founder-card .avatar {
  width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--gradient); display: flex; align-items: center; justify-content: center;
  font-size: 24px; color: #fff; font-weight: 700;
}
.founder-card h3 { font-size: 18px; margin-bottom: 4px; color: #fff; }
.founder-card .role { font-size: 13px; color: var(--accent); margin-bottom: 12px; }
.founder-card p { font-size: 13px; color: var(--ink-3); }
.founder-card .tags { margin-top: 12px; display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.founder-card .tag {
  padding: 3px 10px; border-radius: 999px; font-size: 11px;
  background: var(--primary-soft); color: var(--primary); border: 1px solid rgba(99,102,241,.2);
}

.timeline { position: relative; max-width: 680px; margin: 0 auto; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 5px; bottom: 5px;
  width: 2px; background: linear-gradient(180deg, var(--primary), var(--accent));
}
.timeline-item { position: relative; padding: 0 0 30px 24px; }
.timeline-item::before {
  content: ""; position: absolute; left: -26px; top: 5px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent);
}
.timeline-item .year { font-size: 13px; font-weight: 700; color: var(--accent); }
.timeline-item h3 { font-size: 17px; margin: 2px 0 6px; color: #fff; }
.timeline-item p { font-size: 14px; color: var(--ink-3); }

/* ---------- 产品页 ---------- */
.product-subnav {
  position: sticky; top: 64px; z-index: 90;
  background: rgba(10,15,30,.9); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}
.product-subnav .container { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.chip {
  padding: 6px 18px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--ink-2); background: var(--bg-soft); border: 1px solid var(--line);
  transition: all .2s;
}
.chip:hover, .chip.active { background: var(--gradient); color: #fff; border-color: transparent; }

.product-block { padding: 72px 0; }
.product-block:nth-of-type(even) { background: var(--bg-soft); }
.product-block .inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.product-block:nth-of-type(even) .inner .p-visual { order: -1; }
.product-block .p-tag {
  display: inline-block; padding: 4px 14px; border-radius: 999px;
  background: var(--primary-soft); color: var(--accent); font-size: 13px; font-weight: 700;
  margin-bottom: 14px; border: 1px solid rgba(99,102,241,.2);
}
.product-block h2 { font-size: 30px; margin-bottom: 14px; color: #fff; }
.product-block h2 em { font-style: normal; color: var(--accent); }
.product-block .p-desc { color: var(--ink-3); font-size: 15px; margin-bottom: 20px; }
.feature-list { display: grid; gap: 10px; margin-bottom: 24px; }
.feature-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--ink-2); }
.feature-list svg { flex: none; width: 18px; height: 18px; margin-top: 3px; }
.p-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* 产品可视化占位 */
.p-visual {
  border-radius: 16px; border: 1px solid var(--line); background: var(--bg-card);
  backdrop-filter: blur(8px); overflow: hidden;
}
.p-visual .pv-bar {
  display: flex; gap: 6px; align-items: center;
  padding: 12px 16px; background: rgba(0,0,0,.3); border-bottom: 1px solid var(--line);
}
.pv-bar i { width: 10px; height: 10px; border-radius: 50%; background: #475569; }
.pv-bar i:nth-child(1) { background: #ef4444; }
.pv-bar i:nth-child(2) { background: #f59e0b; }
.pv-bar i:nth-child(3) { background: #10b981; }
.pv-bar span { margin-left: auto; font-size: 11px; color: var(--ink-3); }
.p-visual .pv-body { padding: 24px; display: grid; gap: 14px; }
.pv-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.pv-row i {
  height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(139,92,246,.15));
}
.pv-row i.hl { background: var(--gradient); opacity: .7; }
.pv-row i.hl2 { background: var(--gradient-accent); opacity: .6; }
.p-visual .pv-caption { padding: 0 24px 18px; font-size: 12px; color: var(--ink-3); }

/* 对比表 */
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th { background: var(--bg-soft); color: var(--ink-2); padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); font-weight: 600; }
.compare-table td { padding: 14px 16px; border-bottom: 1px solid var(--line-light); color: var(--ink-2); }
.compare-table tr:hover td { background: rgba(99,102,241,.05); }
.compare-table .highlight { color: var(--accent); font-weight: 700; }
.compare-table .old { color: var(--ink-3); text-decoration: line-through; }

/* ---------- 下载页 ---------- */
.download-card {
  display: grid; grid-template-columns: 80px 1fr auto; gap: 24px; align-items: center;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; backdrop-filter: blur(8px); transition: all .25s;
}
.download-card + .download-card { margin-top: 20px; }
.download-card:hover { border-color: rgba(99,102,241,.3); box-shadow: var(--glow); }
.dl-icon {
  width: 80px; height: 80px; border-radius: 18px; background: var(--gradient);
  display: flex; align-items: center; justify-content: center; color: #fff;
}
.dl-icon svg { width: 38px; height: 38px; }
.download-card h3 { font-size: 20px; margin-bottom: 6px; color: #fff; }
.download-card .dl-meta { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--ink-3); margin-bottom: 8px; }
.download-card .dl-meta b { color: var(--ink-2); font-weight: 600; }
.dl-changelog { font-size: 13px; color: var(--ink-3); }
.dl-changelog span { color: var(--accent); font-weight: 600; }
.dl-buttons { display: flex; flex-direction: column; gap: 10px; min-width: 190px; }
.sys-note { font-size: 12px; color: var(--ink-3); text-align: center; }

/* ---------- 申请试用 ---------- */
.trial-wrap { max-width: 600px; margin: 0 auto; }
.trial-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 20px;
  backdrop-filter: blur(12px); padding: 40px 38px;
}
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--ink); }
.form-field label .req { color: var(--danger); margin-left: 2px; }
.form-field input {
  width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--line); font-size: 15px; font-family: var(--font);
  transition: border-color .2s, box-shadow .2s; outline: none;
  background: rgba(0,0,0,.3); color: #fff;
}
.form-field input::placeholder { color: var(--ink-3); }
.form-field input:focus {
  border-color: var(--primary); background: rgba(0,0,0,.4);
  box-shadow: 0 0 0 4px rgba(99,102,241,.15);
}
.form-field input.invalid { border-color: var(--danger); }
.field-error { display: none; font-size: 13px; color: var(--danger); margin-top: 6px; }
.field-error.show { display: block; }
.form-actions { margin-top: 8px; }
.form-actions .btn { width: 100%; }
.form-note { font-size: 12px; color: var(--ink-3); margin-top: 16px; text-align: center; }

/* 弹窗 */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,.6); backdrop-filter: blur(6px);
  align-items: center; justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal-box {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 20px; padding: 40px 34px 30px;
  max-width: 400px; width: 90%; text-align: center;
  box-shadow: var(--shadow-lg);
  animation: modalIn .25s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(16px) scale(.96); } to { opacity: 1; transform: none; } }
.modal-icon {
  width: 60px; height: 60px; border-radius: 50%; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
}
.modal-icon.success { background: rgba(16,185,129,.15); }
.modal-icon.error { background: rgba(239,68,68,.15); }
.modal-icon svg { width: 30px; height: 30px; }
.modal-box h3 { font-size: 20px; margin-bottom: 10px; color: #fff; }
.modal-box p { font-size: 14px; color: var(--ink-3); margin-bottom: 24px; line-height: 1.6; }
.modal-box .btn { min-width: 120px; }

.trial-benefits { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 16px; }
.benefits-title { text-align: center; font-size: 16px; color: var(--ink-2); margin-top: 36px; margin-bottom: 0; letter-spacing: .5px; }
.benefits-title::after { content: ''; display: block; width: 32px; height: 3px; background: var(--primary); margin: 10px auto 0; border-radius: 2px; }
.trial-benefits .tb {
  text-align: center; padding: 24px 16px; border-radius: var(--radius-sm);
  background: var(--bg-soft); border: 1px solid var(--line);
  transition: border-color .25s, box-shadow .25s;
}
.trial-benefits .tb:hover { border-color: var(--primary); box-shadow: 0 0 20px rgba(99,102,241,.15); }
.trial-benefits .tb svg { width: 32px; height: 32px; margin: 0 auto 12px; }
.trial-benefits .tb h4 { font-size: 15px; margin-bottom: 6px; color: #fff; }
.trial-benefits .tb p { font-size: 13px; color: var(--ink-3); line-height: 1.6; }

/* ---------- 页脚 ---------- */
.site-footer { background: #060a14; color: var(--ink-3); padding: 56px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px; }
.footer-grid .f-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 18px; font-weight: 700; margin-bottom: 14px; }
.footer-grid p { font-size: 13px; line-height: 1.8; }
.footer-grid h4 { color: #fff; font-size: 14px; margin-bottom: 16px; }
.footer-grid ul li { margin-bottom: 8px; font-size: 13px; }
.footer-grid ul a { transition: color .2s; }
.footer-grid ul a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 20px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 12px;
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid, .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 34px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cards-3, .cards-4 { grid-template-columns: 1fr; }
  .product-block .inner { grid-template-columns: 1fr; gap: 32px; }
  .product-block:nth-of-type(even) .inner .p-visual { order: 0; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .founder-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .trial-benefits { grid-template-columns: 1fr; }
  .download-card { grid-template-columns: 64px 1fr; }
  .dl-icon { width: 64px; height: 64px; border-radius: 14px; }
  .dl-icon svg { width: 28px; height: 28px; }
  .dl-buttons { grid-column: 1 / -1; flex-direction: row; }
  .dl-buttons .btn { flex: 1; }
  .compare-table { font-size: 12px; }
  .compare-table th, .compare-table td { padding: 10px 10px; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--bg-soft); border-bottom: 1px solid var(--line);
    padding: 10px 16px 16px; display: none; box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 12px; }
  .nav-toggle { display: block; }
  .section { padding: 52px 0; }
  .section-head h2 { font-size: 24px; }
  .section-head { margin-bottom: 36px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .cards-4 { grid-template-columns: 1fr 1fr; }
  .trial-card { padding: 28px 20px; }
  .cta-banner { padding: 40px 22px; }
  .cta-banner h2 { font-size: 22px; }
  .page-hero h1 { font-size: 26px; }
  .page-hero { padding: 48px 0 36px; }
  .hero h1 { font-size: 28px; }
  .steps { grid-template-columns: 1fr; }
  .compare-table { display: block; overflow-x: auto; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 24px; }
  .stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat { padding: 16px 12px; }
  .stat .num { font-size: 24px; }
  .btn-lg { padding: 13px 28px; font-size: 15px; }
  .footer-grid { grid-template-columns: 1fr; }
}