/* TrustmeAntivirus 官網樣式 —— 資安產品風格，刻意避免模板化設計 */

:root {
  --bg: #f7f9fb;
  --surface: #ffffff;
  --ink: #0d1b2e;
  --muted: #5b7395;
  --line: #dde6f0;
  --accent: #0891b2;
  --accent-deep: #0e7490;
  --accent-soft: #e0f5f9;
  --danger: #dc2626;
  --ok: #059669;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

code {
  font-family: var(--mono);
  font-size: .85em;
  background: var(--accent-soft);
  color: var(--accent-deep);
  padding: 1px 6px;
  border-radius: 4px;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 28px; }
.container.narrow { max-width: 760px; }

a { color: var(--accent-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 導覽列 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 249, 251, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.nav.scrolled { box-shadow: 0 4px 20px rgba(13, 27, 46, .07); }

.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }

.brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 17px; letter-spacing: .2px; color: var(--ink);
}
.brand b { color: var(--accent-deep); }
.brand-mark { color: var(--accent-deep); }

.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links a.btn { color: #fff; }
.nav-links a.btn:hover { text-decoration: none; opacity: .9; }

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px; font-weight: 600;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  cursor: pointer;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary {
  background: var(--accent-deep); color: #fff;
  box-shadow: 0 2px 0 rgba(0,0,0,.06), inset 0 1px 0 rgba(255,255,255,.12);
}
.btn.primary:hover { background: var(--accent); box-shadow: 0 6px 18px rgba(8,145,178,.28); }
.btn.ghost {
  background: var(--surface); color: var(--ink);
  border-color: var(--line);
}
.btn.ghost:hover { border-color: var(--accent); color: var(--accent-deep); }
.btn.small { padding: 8px 16px; font-size: 14px; }
.btn.wide { width: 100%; }

/* ---------- Hero ---------- */
.hero { padding: 76px 0 90px; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 56px; align-items: center;
}
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding: 52px 0 64px; }
}

.eyebrow {
  font-size: 13px; font-weight: 700; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--accent-deep);
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(38px, 5vw, 54px);
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero h1 .accent { color: var(--accent-deep); }

.lede { font-size: 17px; color: var(--muted); max-width: 52ch; margin-bottom: 30px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }

.hero-meta { font-size: 13px; color: var(--muted); font-family: var(--mono); }

/* ---------- 應用視窗模擬 ---------- */
.mockup {
  background: #0b1220;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(13, 27, 46, .25), 0 0 0 1px rgba(13,27,46,.08);
  transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
  transition: transform .5s ease;
}
.mockup:hover { transform: perspective(1200px) rotateY(0) rotateX(0); }

.mockup-chrome {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px;
  background: #101a2c;
  border-bottom: 1px solid #24365c;
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.red { background: #f87171; } .dot.yellow { background: #fbbf24; } .dot.green { background: #34d399; }
.mockup-title { margin-left: 8px; font-size: 12px; color: #8ba3c7; font-family: var(--mono); }

.mockup-body { padding: 18px; font-family: var(--mono); }

.mockup-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 16px; }
.mockup-stat {
  background: #14203a; border: 1px solid #24365c;
  border-radius: 8px; padding: 10px 12px;
  display: flex; flex-direction: column;
}
.mockup-stat .num { font-size: 19px; font-weight: 700; color: #e8eefb; }
.mockup-stat .num.ok { color: #34d399; }
.mockup-stat .num.bad { color: #f87171; }
.mockup-stat .lbl { font-size: 11px; color: #8ba3c7; margin-top: 2px; }

.mockup-progress {
  height: 10px; border-radius: 999px;
  background: #101a2c; border: 1px solid #24365c;
  overflow: hidden; margin-bottom: 16px;
}
.mockup-progress span {
  display: block; height: 100%;
  background: linear-gradient(90deg, #22d3ee, #0ea5e9);
}

.mockup-lines { display: flex; flex-direction: column; gap: 6px; font-size: 12px; }
.ml { color: #8ba3c7; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ml.ok { color: #34d399; }
.ml.bad { color: #f87171; font-weight: 700; }
.ml.dim { color: #6b84ab; }

/* ---------- 區塊 ---------- */
.section { padding: 84px 0; }
.section.alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head h2 { font-size: 30px; letter-spacing: -.5px; line-height: 1.3; }
.section-head p { color: var(--muted); margin-top: 8px; font-size: 16px; }

/* ---------- 功能 ---------- */
.feature-list {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 40px;
}
@media (max-width: 880px) { .feature-list { grid-template-columns: 1fr; } }

.feature { background: var(--surface); padding: 30px 26px; }
.feature-tag {
  display: inline-block;
  font-size: 12px; font-weight: 700; letter-spacing: 1.5px;
  color: var(--accent-deep);
  border: 1px solid var(--accent);
  padding: 2px 10px; border-radius: 999px;
  margin-bottom: 16px;
}
.feature h3 { font-size: 18px; margin-bottom: 10px; }
.feature p { font-size: 14.5px; color: var(--muted); }

.feature-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 20px 44px;
}
@media (max-width: 720px) { .feature-grid { grid-template-columns: 1fr; } }

.check-list { list-style: none; }
.check-list li {
  position: relative;
  padding: 10px 0 10px 30px;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
}
.check-list li::before {
  content: "";
  position: absolute; left: 0; top: 17px;
  width: 18px; height: 18px;
  border-radius: 5px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230e7490' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/12px no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230e7490' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/12px no-repeat;
}
.check-list b { color: var(--ink); }

/* ---------- 下載 ---------- */
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 720px) { .dl-grid { grid-template-columns: 1fr; } }

.dl-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 32px 28px;
  display: flex; flex-direction: column;
}
.dl-card h3 { font-size: 19px; margin-bottom: 6px; }
.dl-size { font-size: 14px; color: var(--muted); margin-bottom: 22px; font-family: var(--mono); }
.dl-note { font-size: 13px; color: var(--muted); margin-top: 16px; }

/* ---------- SmartScreen 說明 ---------- */
.note {
  background: #fffdf5;
  border: 1px solid #f2e3ae;
  border-left: 4px solid #ca8a04;
  border-radius: 10px;
  padding: 28px 30px;
}
.note p { margin-bottom: 12px; font-size: 15.5px; }
.note ol { margin: 0 0 14px 22px; font-size: 15.5px; }
.note b { color: var(--ink); }

/* ---------- 頁腳 ---------- */
.footer { background: #0b1220; color: #8ba3c7; padding: 56px 0 32px; margin-top: 20px; }
.footer .brand { color: #e8eefb; }
.footer .brand b { color: #22d3ee; }
.footer .brand-mark { color: #22d3ee; }

.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }

.f-tag { font-size: 14px; margin-top: 10px; color: #6b84ab; }
.f-col h4 { color: #e8eefb; font-size: 14px; letter-spacing: 1px; margin-bottom: 14px; }
.f-col a { display: block; color: #8ba3c7; font-size: 14px; padding: 4px 0; }
.f-col a:hover { color: #22d3ee; text-decoration: none; }

.f-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 22px;
  border-top: 1px solid #24365c;
  font-size: 13px; color: #6b84ab;
}