/* ============================================================
   MacShot 官网样式
   设计语言沿用应用本体：白底 + 近黑 + 0.5px 极淡描边，不出现彩色装饰。
   层次靠「浅灰底 / 纯白卡 / 细描边」三者撑起来，不靠阴影堆叠。
   所有间距按 4 的倍数：4 / 8 / 12 / 16 / 24 / 32 / 48 / 64 / 96。
   强调色只有一个：系统蓝，仅用于链接、焦点与少量状态点。
   ============================================================ */

:root {
  --ink: #0d0d0f;
  --ink-2: #4b4b53;
  --ink-3: #86868d;
  --line: #e6e6eb;
  --line-2: #dcdce2;
  --bg: #ffffff;
  --bg-alt: #f7f7f9;
  --bg-deep: #0d0d0f;
  --accent: #0071e3;
  --accent-soft: #eaf3ff;
  --radius-s: 10px;
  --radius: 16px;
  --radius-l: 24px;
  --shadow-s: 0 1px 2px rgba(0, 0, 0, 0.04), 0 0 0 0.5px rgba(0, 0, 0, 0.06);
  --shadow-m: 0 8px 24px -12px rgba(0, 0, 0, 0.16), 0 0 0 0.5px rgba(0, 0, 0, 0.07);
  --shadow-l: 0 32px 64px -32px rgba(0, 0, 0, 0.28), 0 0 0 0.5px rgba(0, 0, 0, 0.08);
  --wrap: 1120px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font: 17px/1.7 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }

::selection { background: #0d0d0f; color: #fff; }

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

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--ink); color: #fff; padding: 12px 20px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ============================================================
   顶部两行：信息栏 + 主导航（各自通栏，不挤在同一行）
   ============================================================ */

.hdr { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.86); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--line); }

/* 第一行：品牌 + 一句话定位 / 版本与联系 */
.topbar { border-bottom: 1px solid var(--line); font-size: 13px; color: var(--ink-3); }
.topbar .wrap { display: flex; align-items: center; gap: 16px; height: 44px; }
.topbar-brand { display: flex; align-items: center; gap: 8px; min-width: 0; }
.topbar-brand svg { width: 15px; height: 15px; flex: none; color: var(--ink); }
.topbar-name { font-weight: 600; letter-spacing: -0.01em; color: var(--ink); }
.topbar-tag { padding-left: 10px; margin-left: 2px; border-left: 1px solid var(--line-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 16px; white-space: nowrap; }
.topbar-right a { color: var(--ink-2); transition: color 0.18s; }
.topbar-right a:hover { color: var(--ink); }
.topbar-right .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--line-2); }

/* 第二行：主导航独占通栏 */
.nav { }
.nav .wrap { display: flex; align-items: center; height: 56px; gap: 4px; }
.nav-logo { display: none; }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  position: relative; padding: 8px 14px; border-radius: 8px;
  font-size: 15px; font-weight: 500; color: var(--ink-2);
  transition: color 0.18s, background 0.18s; white-space: nowrap;
}
.nav-links a:hover { color: var(--ink); background: var(--bg-alt); }
.nav-links a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.nav-links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; background: var(--ink); border-radius: 1px;
}
.nav-tail { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.lang {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border: 1px solid var(--line-2); border-radius: 8px;
  font-size: 13px; color: var(--ink-2); transition: 0.18s;
}
.lang:hover { border-color: var(--ink-3); color: var(--ink); }
.nav-toggle { display: none; }

/* ============================================================
   按钮
   ============================================================ */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 26px; border-radius: 12px;
  font-size: 16px; font-weight: 600; letter-spacing: -0.01em;
  transition: transform 0.18s var(--ease), background 0.18s, box-shadow 0.18s, border-color 0.18s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary { background: var(--ink); color: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2); }
.btn-primary:hover { background: #25252b; transform: translateY(-1px); box-shadow: 0 8px 20px -8px rgba(0, 0, 0, 0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: #fff; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn-ghost:hover { box-shadow: inset 0 0 0 1px var(--ink-3); background: #fcfcfd; }
.btn-sm { min-height: 38px; padding: 0 16px; font-size: 14px; border-radius: 9px; }
.btn-block { width: 100%; }

.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--accent); font-size: 15px; }
.link-arrow svg { width: 15px; height: 15px; transition: transform 0.2s var(--ease); }
.link-arrow:hover svg { transform: translateX(3px); }

/* ============================================================
   通用版式
   ============================================================ */

.sec { padding: 96px 0; }
.sec-sm { padding: 64px 0; }
.sec-alt { background: var(--bg-alt); }
.sec-hair { border-top: 1px solid var(--line); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--ink-3); }

h1, h2, h3, h4 {
  letter-spacing: -0.028em; font-weight: 700; line-height: 1.14;
  text-wrap: balance;
  /* 不设 keep-all：中文没有空格，冻结断行会把句号挤到单独一行。
     断行点由文案里的 <br> 控制，其余交给浏览器的 CJK 断行规则。 */
  overflow-wrap: break-word;
}
h1 { font-size: clamp(38px, 5.6vw, 66px); line-height: 1.06; }
h2 { font-size: clamp(27px, 3.4vw, 42px); }
h3 { font-size: 20px; letter-spacing: -0.02em; line-height: 1.35; }
h4 { font-size: 16px; letter-spacing: -0.01em; }

.lead { font-size: clamp(17px, 1.6vw, 20px); line-height: 1.65; color: var(--ink-2); }
.muted { color: var(--ink-3); }
.sec-head { max-width: 720px; margin-bottom: 56px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head p { margin-top: 16px; font-size: 18px; line-height: 1.65; color: var(--ink-2); }
.sec-head.center .eyebrow { justify-content: center; }
.sec-head.center .eyebrow::before { display: none; }

.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================================
   卡片
   ============================================================ */

.card {
  display: flex; flex-direction: column;
  background: #fff; border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow-s); transition: box-shadow 0.24s var(--ease), transform 0.24s var(--ease);
}
.card:hover { box-shadow: var(--shadow-m); transform: translateY(-2px); }
.card h3 { margin-bottom: 8px; }
.card p { font-size: 15px; line-height: 1.65; color: var(--ink-2); }
.card-link { margin-top: auto; padding-top: 18px; }
.card-ico {
  width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center;
  background: var(--ink); color: #fff; margin-bottom: 18px;
}
.card-ico svg { width: 22px; height: 22px; }
.card-ico.soft { background: var(--bg-alt); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }

.card-flex { display: flex; flex-direction: column; }

.card-flat { background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: inset 0 0 0 1px var(--line); }

/* 特性行：图标 + 标题 + 说明 */
.frow { display: flex; gap: 16px; }
.frow .card-ico { flex: none; margin-bottom: 0; width: 40px; height: 40px; border-radius: 10px; }
.frow .card-ico svg { width: 20px; height: 20px; }
.frow h3 { font-size: 17px; margin-bottom: 6px; }
.frow p { font-size: 15px; line-height: 1.6; color: var(--ink-2); }

/* ============================================================
   首屏
   ============================================================ */

.hero { padding: 88px 0 84px; position: relative; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.hero-copy { max-width: 560px; }
.hero h1 { margin-bottom: 22px; font-size: clamp(38px, 4.4vw, 58px); }
.hero h1 em { font-style: normal; color: #b9b9c0; }
.hero p.lead { margin-bottom: 14px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0 32px; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 500; color: var(--ink-2);
  padding: 6px 12px; border-radius: 100px; background: var(--bg-alt);
  box-shadow: inset 0 0 0 1px var(--line);
}
.tag svg { width: 13px; height: 13px; color: var(--ink-3); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero-note { margin-top: 16px; font-size: 13px; color: var(--ink-3); display: flex; align-items: center; gap: 8px; }
.hero-note .pulse { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); flex: none; }

/* 首屏下方数据条 */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 28px 24px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { display: block; font-size: clamp(26px, 2.8vw, 34px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; }
.stat b small { font-size: 15px; font-weight: 600; color: var(--ink-3); letter-spacing: 0; margin-left: 2px; }
.stat span { display: block; margin-top: 6px; font-size: 13px; color: var(--ink-3); }

/* ============================================================
   应用界面模拟（纯 CSS，不依赖截图）
   ============================================================ */

.mock { position: relative; }
.mock-stage {
  position: relative; border-radius: var(--radius-l);
  background: linear-gradient(160deg, #eceef1 0%, #e3e6ea 45%, #dfe2e7 100%);
  padding: 24px 22px 96px; box-shadow: var(--shadow-l);
  overflow: hidden;
}
/* 屏幕里的"桌面内容"：抽象的产品页面 */
.screen { position: relative; border-radius: 12px; overflow: hidden; background: #fff; box-shadow: 0 12px 32px -14px rgba(0, 0, 0, 0.35); }
.screen-bar { height: 30px; display: flex; align-items: center; gap: 6px; padding: 0 12px; background: #f2f2f4; border-bottom: 1px solid #e8e8ec; }
.screen-bar i { width: 9px; height: 9px; border-radius: 50%; background: #d6d6db; }
.screen-bar i:nth-child(1) { background: #ff5f57; }
.screen-bar i:nth-child(2) { background: #febc2e; }
.screen-bar i:nth-child(3) { background: #28c840; }
.screen-body { padding: 22px 20px 26px; }
.sk { background: #ececf0; border-radius: 5px; }
.sk-h { height: 13px; width: 46%; margin-bottom: 12px; background: #dcdce2; }
.sk-t { height: 8px; margin-bottom: 8px; }
.sk-t.w1 { width: 92%; } .sk-t.w2 { width: 78%; } .sk-t.w3 { width: 84%; }
.sk-row { display: flex; gap: 10px; margin-top: 18px; }
.sk-card { flex: 1; height: 62px; background: #f4f4f7; border-radius: 8px; box-shadow: inset 0 0 0 1px #ececf0; }
.sk-chart { margin-top: 18px; height: 74px; border-radius: 8px; background: linear-gradient(180deg, #f7f8fa, #eef0f4); position: relative; overflow: hidden; }
.sk-chart::after {
  content: ""; position: absolute; left: 8%; right: 8%; bottom: 12px; height: 42px;
  background: linear-gradient(180deg, rgba(13,13,15,0.06), rgba(13,13,15,0));
  clip-path: polygon(0 70%, 16% 44%, 32% 58%, 48% 26%, 66% 40%, 82% 12%, 100% 30%, 100% 100%, 0 100%);
}

/* 选区：虚线 + 八向手柄 + 尺寸标签
   压暗靠 outline 而不是 box-shadow：outline 画在边框外侧，
   天然把选区内部"挖空"，且不参与布局、被 .screen 的 overflow 裁掉 */
.mk-sel {
  position: absolute; left: 8%; top: 15%; width: 66%; height: 62%;
  border: 1.5px solid #0d0d0f;
  outline: 9999px solid rgba(13, 13, 15, 0.4);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.6);
  pointer-events: none; z-index: 2;
}
.mk-handle {
  position: absolute; width: 9px; height: 9px; background: #fff;
  border: 1.5px solid #0d0d0f; border-radius: 2px; box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.mk-handle.nw { left: -5px; top: -5px; } .mk-handle.n { left: 50%; top: -5px; margin-left: -4.5px; }
.mk-handle.ne { right: -5px; top: -5px; } .mk-handle.w { left: -5px; top: 50%; margin-top: -4.5px; }
.mk-handle.e { right: -5px; top: 50%; margin-top: -4.5px; } .mk-handle.sw { left: -5px; bottom: -5px; }
.mk-handle.s { left: 50%; bottom: -5px; margin-left: -4.5px; } .mk-handle.se { right: -5px; bottom: -5px; }
.mk-dim {
  position: absolute; left: 50%; transform: translateX(-50%); top: -26px;
  background: rgba(13, 13, 15, 0.86); color: #fff; font-size: 10px; font-weight: 600;
  padding: 2px 7px; border-radius: 4px; letter-spacing: 0.02em; white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* 选区内的标注示意 */
.mk-anno { position: absolute; inset: 0; }
.mk-arrow { position: absolute; left: 8%; top: 52%; width: 46%; height: 2px; background: #ff3b30; transform: rotate(-14deg); border-radius: 2px; }
.mk-arrow::after {
  content: ""; position: absolute; right: -1px; top: -4px; width: 0; height: 0;
  border-left: 9px solid #ff3b30; border-top: 5px solid transparent; border-bottom: 5px solid transparent;
}
.mk-box { position: absolute; right: 9%; top: 14%; width: 26%; height: 34%; border: 2px solid #ff3b30; border-radius: 4px; }

/* 浮出的工具条 */
.mk-bar {
  position: absolute; left: 50%; transform: translateX(-50%); bottom: 14px;
  background: #fbfbfd; border-radius: 11px; padding: 7px 9px;
  box-shadow: 0 10px 28px -10px rgba(0,0,0,0.4), 0 0 0 0.5px rgba(0,0,0,0.12);
  display: flex; flex-direction: column; gap: 6px; z-index: 5;
}
.mk-tools { display: flex; align-items: center; gap: 2px; }
.mk-tools i { width: 26px; height: 26px; border-radius: 6px; display: grid; place-items: center; color: #3a3a42; }
.mk-tools i svg { width: 15px; height: 15px; }
.mk-tools i.on { background: #e8e8ed; color: #0d0d0f; }
.mk-tools .sep { width: 1px; height: 16px; background: #dcdce2; margin: 0 3px; }
.mk-tools .ok { background: #0d0d0f; color: #fff; }
.mk-styles { display: flex; align-items: center; gap: 5px; padding: 0 2px 1px; }
.mk-styles .sw { width: 11px; height: 11px; border-radius: 50%; box-shadow: inset 0 0 0 0.5px rgba(0,0,0,0.15); }
.mk-styles .sw.on { outline: 1.5px solid #0d0d0f; outline-offset: 1.5px; }
.mk-styles .q { width: 12px; height: 3px; border-radius: 2px; background: #c8c8d0; }
.mk-styles .q.on { background: #0d0d0f; height: 4px; }

/* 拖拽的浮动小卡：水印示意 */
.mk-wm {
  position: absolute; right: -8px; bottom: 42px; width: 220px; background: #fff;
  border-radius: 12px; padding: 10px 12px 12px; box-shadow: var(--shadow-l); z-index: 4;
}
.mk-wm .lbl { font-size: 10px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.04em; margin-bottom: 8px; }
.mk-wm .prev { height: 58px; border-radius: 6px; background: #f4f4f6; position: relative; overflow: hidden; box-shadow: inset 0 0 0 1px #ececf0; }
.mk-wm .prev .rep {
  position: absolute; inset: -20px; transform: rotate(-30deg);
  font-size: 8px; color: rgba(13,13,15,0.16); line-height: 2.4; word-spacing: 6px; letter-spacing: 1px;
  white-space: nowrap; overflow: hidden;
}
.mk-wm .brand { position: absolute; left: 6px; right: 6px; bottom: 0; height: 18px; background: #fff; display: flex; align-items: center; gap: 4px; padding: 0 5px; border-top: 1px solid #eeeef2; }
.mk-wm .brand .b1 { width: 9px; height: 9px; border-radius: 2px; background: #0d0d0f; }
.mk-wm .brand .b2 { height: 3px; width: 34px; border-radius: 2px; background: #c9c9d1; }
.mk-wm .brand .b3 { height: 3px; width: 18px; border-radius: 2px; background: #e2e2e7; margin-left: auto; }

/* ============================================================
   数据条 / 对比
   ============================================================ */

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.cmp-card { background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-s); }
.cmp-card .top { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 6px; }
.cmp-card .top b { font-size: 17px; letter-spacing: -0.01em; }
.cmp-card .top span { font-size: 12px; color: var(--ink-3); }
.cmp-card .num { font-size: clamp(34px, 4.6vw, 52px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.05; margin: 14px 0 16px; font-variant-numeric: tabular-nums; }
.cmp-card .num small { font-size: 16px; font-weight: 600; color: var(--ink-3); letter-spacing: 0; margin-left: 4px; }
.cmp-bar { height: 10px; border-radius: 6px; background: var(--bg-alt); overflow: hidden; box-shadow: inset 0 0 0 1px var(--line); }
.cmp-bar i { display: block; height: 100%; border-radius: 6px; background: var(--ink-3); }
.cmp-bar i.hi { background: var(--ink); }
.cmp-card p { margin-top: 14px; font-size: 14px; color: var(--ink-2); line-height: 1.6; }
.cmp-card.is-win { box-shadow: inset 0 0 0 1.5px var(--ink); }

/* ============================================================
   表格
   ============================================================ */

.tbl-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: inset 0 0 0 1px var(--line); background: #fff; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; min-width: 600px; }
th, td { text-align: left; padding: 15px 20px; font-size: 15px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-3); background: #fcfcfd; }
tbody tr:last-child td { border-bottom: 0; }
td b { font-weight: 600; }
td .kbd { margin: 0 2px 2px 0; }

/* 键帽 */
.kbd {
  display: inline-block; padding: 2px 7px; border-radius: 5px; font-size: 12px; font-weight: 600;
  font-family: ui-monospace, "SF Mono", Menlo, monospace; line-height: 1.5;
  background: var(--bg-alt); color: var(--ink-2);
  box-shadow: inset 0 0 0 1px var(--line-2), 0 1px 0 var(--line-2);
}

/* ============================================================
   流程步骤
   ============================================================ */

.steps { display: grid; gap: 0; border-top: 1px solid var(--line); }
.step { display: grid; grid-template-columns: 84px 1fr; gap: 24px; padding: 30px 0; border-bottom: 1px solid var(--line); align-items: start; }
.step-n { font-size: 13px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.06em; padding-top: 4px; }
.step h3 { margin-bottom: 8px; font-size: 20px; }
.step p { color: var(--ink-2); font-size: 16px; line-height: 1.65; max-width: 62ch; }
.step .kbd { margin-top: 10px; }

/* ============================================================
   FAQ
   ============================================================ */

.faq { border-top: 1px solid var(--line); max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 22px 0; cursor: pointer; list-style: none;
  font-size: 17px; font-weight: 600; letter-spacing: -0.01em;
  transition: color 0.18s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--ink-2); }
.faq summary .pm { flex: none; width: 20px; height: 20px; position: relative; }
.faq summary .pm::before, .faq summary .pm::after {
  content: ""; position: absolute; left: 50%; top: 50%; background: var(--ink-2);
  transform: translate(-50%, -50%); border-radius: 1px; transition: transform 0.24s var(--ease), opacity 0.24s;
}
.faq summary .pm::before { width: 12px; height: 1.5px; }
.faq summary .pm::after { width: 1.5px; height: 12px; }
.faq details[open] summary .pm::after { transform: translate(-50%, -50%) scaleY(0); opacity: 0; }
.faq .ans { padding: 0 44px 24px 0; color: var(--ink-2); font-size: 16px; line-height: 1.72; }
.faq .ans p + p { margin-top: 10px; }
.faq .ans a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

/* ============================================================
   底部强转化
   ============================================================ */

.cta { background: var(--bg-deep); color: #fff; border-radius: 0; position: relative; overflow: hidden; }
.cta::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 80% at 78% 0%, rgba(255,255,255,0.09), transparent 60%);
}
.cta .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; padding-top: 80px; padding-bottom: 80px; }
.cta h2 { color: #fff; margin-bottom: 18px; }
.cta .lead { color: rgba(255, 255, 255, 0.66); }
.cta-list { margin: 26px 0 0; display: grid; gap: 12px; }
.cta-list li { display: flex; gap: 11px; align-items: flex-start; font-size: 15px; color: rgba(255, 255, 255, 0.86); }
.cta-list svg { width: 17px; height: 17px; flex: none; margin-top: 3px; color: rgba(255,255,255,0.5); }
.cta-panel { background: rgba(255, 255, 255, 0.055); border-radius: var(--radius); padding: 26px; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.11); }
.cta-panel h3 { color: #fff; font-size: 17px; margin-bottom: 6px; }
.cta-panel p { font-size: 14px; color: rgba(255, 255, 255, 0.6); margin-bottom: 18px; }
.cta-panel .btn-primary { background: #fff; color: var(--ink); }
.cta-panel .btn-primary:hover { background: #f0f0f2; }
.cta-panel .btn-ghost { background: transparent; color: #fff; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.24); }
.cta-panel .btn-ghost:hover { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5); background: rgba(255,255,255,0.05); }
.cta-fine { margin-top: 16px; font-size: 12px; line-height: 1.6; color: rgba(255, 255, 255, 0.42); }

/* 邮件订阅表单 */
.subform { display: flex; gap: 8px; margin-top: 4px; }
.subform input {
  flex: 1; min-width: 0; height: 48px; padding: 0 14px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.07); border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff; font-size: 15px; transition: 0.18s;
}
.subform input::placeholder { color: rgba(255, 255, 255, 0.42); }
.subform input:focus { outline: none; border-color: rgba(255, 255, 255, 0.45); background: rgba(255, 255, 255, 0.1); }
.subform .btn { flex: none; }
.form-msg { margin-top: 10px; font-size: 13px; min-height: 18px; color: rgba(255, 255, 255, 0.72); }

/* ============================================================
   页脚
   ============================================================ */

.ftr { background: var(--bg-alt); border-top: 1px solid var(--line); padding: 56px 0 32px; font-size: 14px; }
.ftr-top { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.ftr-brand { max-width: 280px; }
.ftr-brand .id { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.ftr-brand .id svg { width: 26px; height: 26px; }
.ftr-brand .id b { font-size: 16px; letter-spacing: -0.01em; }
.ftr-brand p { color: var(--ink-3); font-size: 13px; line-height: 1.65; }
.ftr-col h4 { font-size: 13px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.04em; margin-bottom: 14px; }
.ftr-col ul { display: grid; gap: 10px; }
.ftr-col a { color: var(--ink-2); font-size: 14px; transition: color 0.16s; }
.ftr-col a:hover { color: var(--ink); }
.ftr-bot { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; padding-top: 24px; font-size: 12px; color: var(--ink-3); }
.ftr-bot .sep { color: var(--line-2); }
.ftr-bot .right { margin-left: auto; display: flex; gap: 18px; }

/* ============================================================
   入场动画
   ============================================================ */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: 0.07s; }
.reveal[data-d="2"] { transition-delay: 0.14s; }
.reveal[data-d="3"] { transition-delay: 0.21s; }
.reveal[data-d="4"] { transition-delay: 0.28s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ============================================================
   内页头部
   ============================================================ */

.phead { padding: 72px 0 48px; border-bottom: 1px solid var(--line); }
.phead .eyebrow { margin-bottom: 16px; }
.phead h1 { font-size: clamp(34px, 4.4vw, 52px); max-width: 16ch; }
.phead p { margin-top: 18px; font-size: 18px; line-height: 1.65; color: var(--ink-2); max-width: 62ch; }
.phead-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }

/* 双栏内容 */
.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: center; }
.split.flip .split-media { order: -1; }
/* 窄栏标题比全宽标题低一级：42px 在 457px 宽里一行只放得下 10 个字 */
.split h2, .split-media h2 { font-size: clamp(24px, 2.4vw, 34px); }

/* 明细列表 */
.dlist { display: grid; gap: 0; border-top: 1px solid var(--line); }
.dlist > div { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.dlist dt { color: var(--ink-3); font-size: 14px; }
.dlist dd { color: var(--ink); }

/* 引用 / 提示条 */
.note {
  display: flex; gap: 12px; padding: 18px 20px; border-radius: var(--radius-s);
  background: var(--bg-alt); box-shadow: inset 0 0 0 1px var(--line);
  font-size: 14px; line-height: 1.65; color: var(--ink-2);
}
.note svg { width: 17px; height: 17px; flex: none; margin-top: 2px; color: var(--ink-3); }
.note b { color: var(--ink); font-weight: 600; }

/* 更新日志 */
.log { border-left: 1px solid var(--line); margin-left: 6px; padding-left: 0; }
.log-item { position: relative; padding: 0 0 40px 30px; }
.log-item::before {
  content: ""; position: absolute; left: -5px; top: 8px; width: 9px; height: 9px;
  border-radius: 50%; background: #fff; box-shadow: inset 0 0 0 1.5px var(--ink-3);
}
.log-item.now::before { background: var(--ink); box-shadow: inset 0 0 0 1.5px var(--ink), 0 0 0 4px rgba(13,13,15,0.08); }
.log-ver { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.log-ver b { font-size: 19px; letter-spacing: -0.02em; }
.log-ver time { font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.log-ver .pill { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 100px; background: var(--ink); color: #fff; }
.log ul { display: grid; gap: 8px; }
.log li { position: relative; padding-left: 16px; font-size: 15px; line-height: 1.65; color: var(--ink-2); }
.log li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 1.5px; background: var(--ink-3); border-radius: 1px; }

/* 场景卡 */
.scene { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.scene-card { background: #fff; border-radius: var(--radius); padding: 30px; box-shadow: inset 0 0 0 1px var(--line); transition: 0.24s var(--ease); }
.scene-card:hover { box-shadow: inset 0 0 0 1px var(--ink-3), var(--shadow-m); transform: translateY(-2px); }
.scene-card .who { display: inline-block; font-size: 12px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.04em; margin-bottom: 14px; }
.scene-card h3 { margin-bottom: 10px; }
.scene-card p { font-size: 15px; line-height: 1.68; color: var(--ink-2); margin-bottom: 16px; }
.scene-card .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.scene-card .tags span { font-size: 12px; color: var(--ink-3); padding: 3px 9px; border-radius: 100px; background: var(--bg-alt); box-shadow: inset 0 0 0 1px var(--line); }

/* ============================================================
   响应式：7 档断点
   ============================================================ */

/* 大屏桌面 > 1440 */
@media (min-width: 1441px) {
  :root { --wrap: 1200px; }
  .hero { padding-top: 104px; }
}

/* 普通桌面 1024-1440 */
@media (max-width: 1180px) {
  .hero-inner { gap: 40px; }
}

/* 平板横屏 / 小桌面 768-1024 */
@media (max-width: 1024px) {
  .sec { padding: 72px 0; }
  .hero { padding-top: 56px; }
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-copy { max-width: 640px; }
  .mock { max-width: 560px; }
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .cta .wrap { grid-template-columns: 1fr; gap: 36px; padding-top: 64px; padding-bottom: 64px; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .split.flip .split-media { order: 0; }
  .ftr-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .ftr-brand { grid-column: 1 / -1; max-width: none; }
}

/* 平板竖屏 480-768 */
@media (max-width: 860px) {
  .topbar-tag { display: none; }
  .nav-toggle {
    display: inline-flex; margin-left: auto; align-items: center; gap: 7px;
    height: 38px; padding: 0 14px; border-radius: 9px; font-size: 14px; font-weight: 500;
    box-shadow: inset 0 0 0 1px var(--line-2); color: var(--ink-2);
  }
  .nav-toggle svg { width: 16px; height: 16px; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; padding: 10px 16px 18px; border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px -24px rgba(0, 0, 0, 0.3);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 10px; font-size: 16px; border-radius: 8px; }
  .nav-links a[aria-current="page"]::after { display: none; }
  .nav-tail .lang { display: none; }
  .nav-links .lang-m { display: flex !important; }
  .nav .wrap { position: relative; }
  .stats .wrap { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 20px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .stat:nth-child(3), .stat:nth-child(4) { border-top: 1px solid var(--line); }
  .g2, .g3, .scene { grid-template-columns: 1fr; }
  .compare { grid-template-columns: 1fr; }
  .phead { padding: 52px 0 40px; }
  .dlist > div { grid-template-columns: 1fr; gap: 4px; }
  .step { grid-template-columns: 1fr; gap: 10px; padding: 24px 0; }
  .sec-head { margin-bottom: 40px; }
  .mk-wm { display: none; }
}

/* 大屏手机 414-480 */
@media (max-width: 520px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
  .sec { padding: 56px 0; }
  .hero { padding-top: 40px; }
  h1 { font-size: clamp(32px, 9vw, 42px); }
  .hero-cta .btn { width: 100%; }
  .g4 { grid-template-columns: 1fr; }
  .card, .card-flat, .scene-card, .cmp-card { padding: 22px; }
  .mock-stage { padding: 16px 12px 22px; }
  .mk-bar { transform: translateX(-50%) scale(0.86); transform-origin: bottom center; }
  .ftr-top { grid-template-columns: 1fr; }
  .ftr-bot { flex-direction: column; align-items: flex-start; gap: 10px; }
  .ftr-bot .right { margin-left: 0; flex-wrap: wrap; gap: 14px; }
  .subform { flex-direction: column; }
  .subform .btn { width: 100%; }
  th, td { padding: 12px 14px; font-size: 14px; }
}

/* 小屏手机 < 375 */
@media (max-width: 374px) {
  .wrap { padding: 0 16px; }
  .topbar .wrap { height: 40px; }
  .topbar-right .hide-xs { display: none; }
  .stats .wrap { grid-template-columns: 1fr; }
  .stat { border-left: 0 !important; padding-left: 0 !important; border-top: 1px solid var(--line); }
  .stat:first-child { border-top: 0; }
  .btn { padding: 0 18px; font-size: 15px; }
}