/* Shutterguard 網站共用樣式
   品牌：石墨 #1E2125、暖白 #F4F4F2、珊瑚點綴 #C45648（只用在少數重點，面積很小）。
   不載入任何外部字型或腳本（網站本身也不追蹤），字型用系統字。
   深淺色跟隨系統；圓角統一：卡片 16px、按鈕與標籤 999px、截圖 28px。 */

:root {
  --ink: #1e2125;
  --ink-soft: #3a3f45;
  --muted: #5f646b;
  --paper: #fbfbfa;
  --panel: #f1f1ee;
  --line: rgba(30, 33, 37, 0.12);
  --accent: #c45648;
  --accent-ink: #a8412f;
  --on-ink: #f4f4f2;
  --radius: 16px;
  --max: 1120px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ecece8;
    --ink-soft: #c9c9c4;
    --muted: #9c9fa4;
    --paper: #141619;
    --panel: #1e2125;
    --line: rgba(244, 244, 242, 0.12);
    --accent: #d8705f;
    --accent-ink: #e48a7a;
    --on-ink: #141619;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 17px;
  overflow-x: hidden;
}

a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- 導覽列 ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: 0.01em; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav ul { display: flex; gap: 22px; list-style: none; margin: 0 0 0 auto; padding: 0; font-size: 15px; }
.nav ul a { text-decoration: none; color: var(--muted); white-space: nowrap; }
.nav ul a:hover, .nav ul a[aria-current="page"] { color: var(--ink); }
@media (max-width: 560px) {
  .nav ul { gap: 14px; font-size: 14px; }
  .nav ul .hide-sm { display: none; }
}

/* ---------- 首屏 ---------- */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.4rem, 5.4vw, 4rem); line-height: 1.12; margin: 0 0 18px; letter-spacing: -0.01em; font-weight: 800; }
.hero h1 .dot { color: var(--accent); }
.hero p.lead { font-size: 1.18rem; color: var(--ink-soft); margin: 0 0 28px; max-width: 30em; }
.badge-link { display: inline-block; transition: transform .2s cubic-bezier(.16,1,.3,1); }
.badge-link:active { transform: scale(.98); }
.badge-link img { height: 52px; width: auto; }
@media (prefers-color-scheme: dark) { .badge-link img { outline: 1px solid #a6a6a6; border-radius: 9px; } }
.hero-phone { justify-self: center; }

.phone {
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 30px 60px -30px rgba(30, 33, 37, .45);
  background: #000;
}
.hero-phone .phone { width: min(290px, 74vw); }

@media (max-width: 820px) {
  .hero { padding-top: 36px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 36px; }
}

/* ---------- 區塊共用 ---------- */
section { padding: 72px 0; }
section h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); line-height: 1.25; margin: 0 0 14px; letter-spacing: -0.005em; }
section .intro { color: var(--muted); max-width: 36em; margin: 0 0 36px; }
.tint { background: var(--panel); }

/* 怎麼用：左文右圖（兩張截圖交疊） */
.how .wrap { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 56px; align-items: center; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 26px; }
.steps li { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; }
.steps .n {
  width: 44px; height: 44px; border-radius: 999px; display: grid; place-items: center;
  border: 1.5px solid var(--ink); font-weight: 700;
}
.steps h3 { margin: 4px 0 4px; font-size: 1.12rem; }
.steps p { margin: 0; color: var(--muted); }
.duo { position: relative; height: 630px; }
.duo .phone { position: absolute; width: 250px; }
.duo .phone:first-child { left: 4%; top: 0; }
.duo .phone:last-child { right: 4%; top: 70px; }
@media (max-width: 820px) {
  .how .wrap { grid-template-columns: 1fr; }
  .duo { height: auto; display: flex; gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
  .duo .phone { position: static; width: 64vw; max-width: 260px; flex: none; scroll-snap-align: center; }
}

/* 方案：三欄不等寬，Pro 用深色底強調 */
.plans { display: grid; grid-template-columns: 1fr 1.15fr 1fr; gap: 16px; align-items: stretch; }
.plan { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; background: var(--paper); display: flex; flex-direction: column; }
.plan h3 { margin: 0; font-size: 1.15rem; }
.plan .price { font-size: 2rem; font-weight: 800; margin: 6px 0 2px; }
.plan .price small { font-size: .95rem; font-weight: 500; color: var(--muted); margin-left: 4px; }
.plan .who { color: var(--muted); font-size: .95rem; margin: 0 0 16px; }
.plan ul { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; font-size: .98rem; }
.plan.pro { background: #1e2125; color: #f4f4f2; border-color: #1e2125; }
.plan.pro .who, .plan.pro .price small { color: #b9bcc0; }
.plan.pro .tag { align-self: flex-start; font-size: .8rem; padding: 2px 10px; border-radius: 999px; background: var(--accent); color: #fff; margin-bottom: 10px; }
@media (prefers-color-scheme: dark) { .plan.pro { background: #2a2e33; border-color: #3a3f45; } }
.plans-note { color: var(--muted); font-size: .92rem; margin-top: 18px; }
@media (max-width: 900px) { .plans { grid-template-columns: 1fr; } }

/* 做不到的事：兩欄清單，不用卡片 */
.limits { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; margin: 0; padding: 0; list-style: none; }
.limits li { padding: 18px 0; border-top: 1px solid var(--line); }
.limits h3 { margin: 0 0 4px; font-size: 1.05rem; }
.limits p { margin: 0; color: var(--muted); font-size: .97rem; }
.callout { margin-top: 32px; padding: 18px 22px; border-left: 3px solid var(--accent); background: var(--paper); border-radius: 0 12px 12px 0; }
@media (max-width: 760px) { .limits { grid-template-columns: 1fr; } }

/* 隱私：左圖右文 */
.privacy-split .wrap { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 56px; align-items: center; }
.privacy-split .phone { width: min(290px, 72vw); justify-self: center; }
.points { list-style: none; padding: 0; margin: 0 0 22px; display: grid; gap: 18px; }
.points b { display: block; font-size: 1.05rem; }
.points span { color: var(--muted); }
@media (max-width: 820px) { .privacy-split .wrap { grid-template-columns: 1fr; } .privacy-split .phone { order: 2; } }

.textlink { color: var(--accent-ink); text-decoration: none; font-weight: 600; }
.textlink:hover { text-decoration: underline; }

/* ---------- 文件頁（隱私權政策、條款、常見問題） ---------- */
.doc { padding: 48px 0 72px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); line-height: 1.25; margin: 0 0 8px; }
.doc .meta { color: var(--muted); font-size: .95rem; margin: 0 0 32px; }
.doc h2 { font-size: 1.3rem; margin: 40px 0 10px; }
.doc h3 { font-size: 1.08rem; margin: 26px 0 6px; }
.doc p, .doc li { color: var(--ink-soft); }
.doc table { width: 100%; border-collapse: collapse; font-size: .92rem; display: block; overflow-x: auto; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; min-width: 7em; }
.doc code { font-size: .85em; word-break: break-all; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.doc details { border-top: 1px solid var(--line); padding: 14px 0; }
.doc details:last-of-type { border-bottom: 1px solid var(--line); }
.doc summary { cursor: pointer; font-weight: 600; color: var(--ink); }
.doc details p { margin: 10px 0 0; }

/* ---------- 頁尾 ---------- */
footer { border-top: 1px solid var(--line); padding: 36px 0 48px; font-size: .92rem; color: var(--muted); }
footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: flex-end; align-content: start; }
footer nav a { text-decoration: none; }
footer nav a:hover { color: var(--ink); }
footer p { margin: 0 0 6px; }
@media (max-width: 700px) { footer .wrap { grid-template-columns: 1fr; } footer nav { justify-content: flex-start; } }

/* 進場：只有首屏輕微上移（不從透明開始，動畫沒跑完內容也看得到）；系統要求減少動態時不做 */
@media (prefers-reduced-motion: no-preference) {
  .hero .copy, .hero-phone { animation: rise .7s cubic-bezier(.16,1,.3,1) both; }
  .hero-phone { animation-delay: .12s; }
  @keyframes rise { from { transform: translateY(14px); } to { transform: none; } }
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }