/* ============================================================
   Qwen3-VL API 站 —— 营销 / 文档 / 定价页样式
   与聊天演示站共用白灰主色调，但独立成文件，避免布局样式冲突
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-app: #f7f8fa;
  --surface-2: #f1f3f5;
  --surface-3: #e9ecef;
  --border: #e7e9ed;
  --border-strong: #d6d9de;
  --text: #1d1d1f;
  --text-2: #585b61;
  --text-3: #9498a0;
  --accent: #1d1d1f;
  --accent-hover: #3a3a3e;
  --link: #2563eb;
  --ok: #1f9d57;
  --warn: #c47d12;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 8px;
  --shadow: 0 1px 2px rgba(20,24,33,.05), 0 6px 18px rgba(20,24,33,.06);
  --shadow-lg: 0 10px 40px rgba(20,24,33,.14);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
h1, h2, h3, h4 { letter-spacing: -.015em; line-height: 1.3; }
code, pre { font-family: var(--mono); }

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

/* ─────────────── 背景粒子 ─────────────── */
/* html 承载页面底色，body 透明，让 -1 层的粒子画布能透出来 */
/* 顶部极淡的冷色光晕，配合颗粒形成纵深，不干扰阅读 */
html {
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(37,99,235,.055), transparent 62%),
    radial-gradient(900px 480px at 6% 4%, rgba(29,29,31,.05), transparent 60%),
    var(--bg);
}
body { background: transparent; }

#bg-particles {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: -1;
  pointer-events: none;
  transition: opacity .3s ease;
}

/* 有背景的区块改成半透明，粒子才会透出来（可读性不受影响） */
.section.alt { background: rgba(247, 248, 250, .72); }
.footer { background: rgba(247, 248, 250, .72); }

/* ─────────────── 顶栏账户区 ─────────────── */
.account { position: relative; display: flex; align-items: center; }
.account-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 11px 5px 6px;
  border: 1px solid var(--border-strong); border-radius: 999px;
  background: var(--bg); cursor: pointer;
  font-family: inherit; font-size: 13px; color: var(--text);
  transition: .16s;
}
.account-btn:hover { background: var(--surface-2); }
.account-ava {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--text); color: #fff;
  display: grid; place-items: center; font-size: 12px; font-weight: 500;
}
.account-mail { max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 168px; padding: 6px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow);
  display: none; z-index: 60;
}
.account-menu.is-on { display: block; }
.account-menu a, .account-menu button {
  display: block; width: 100%; text-align: left;
  padding: 8px 10px; border: 0; border-radius: 6px;
  background: none; font-family: inherit; font-size: 13.5px; color: var(--text-2);
  text-decoration: none; cursor: pointer;
}
.account-menu a:hover, .account-menu button:hover { background: var(--surface-2); color: var(--text); }

/* ─────────────── 登录 / 注册弹窗 ─────────────── */
.auth-mask {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(20, 24, 33, .38);
  display: grid; place-items: center; padding: 20px;
}
.auth-box {
  width: 100%; max-width: 380px;
  background: var(--bg); border-radius: var(--radius-lg);
  padding: 26px 24px 22px; position: relative;
  box-shadow: var(--shadow-lg);
}
.auth-close {
  position: absolute; right: 12px; top: 10px;
  width: 28px; height: 28px; border: 0; border-radius: 6px;
  background: none; font-size: 20px; line-height: 1;
  color: var(--text-3); cursor: pointer;
}
.auth-close:hover { background: var(--surface-2); color: var(--text); }
.auth-tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.auth-tab {
  flex: 1; padding: 8px; border: 0; border-radius: 8px;
  background: var(--surface-2); font-family: inherit;
  font-size: 14px; color: var(--text-2); cursor: pointer;
}
.auth-tab.is-on { background: var(--text); color: #fff; }
.auth-hint {
  margin: 0 0 14px; padding: 9px 12px;
  background: var(--surface-2); border-radius: var(--radius-xs);
  font-size: 13px; color: var(--text-2);
}
.auth-field { display: block; margin-bottom: 12px; }
.auth-field span { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; }
.auth-field input {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--border-strong); border-radius: 9px;
  font-family: inherit; font-size: 14px; color: var(--text);
  background: var(--bg); outline: none;
}
.auth-field input:focus { border-color: var(--text-3); box-shadow: 0 0 0 3px rgba(0,0,0,.05); }
.auth-err { margin: 0 0 12px; font-size: 13px; color: var(--err); }
.auth-foot { margin: 14px 0 0; font-size: 11.5px; color: var(--text-3); line-height: 1.6; }

/* ─────────────── 轻提示 ─────────────── */
.site-toast {
  position: fixed; left: 50%; bottom: 28px;
  transform: translate(-50%, 12px);
  z-index: 300; padding: 10px 18px;
  background: var(--text); color: #fff;
  border-radius: 10px; font-size: 13.5px;
  opacity: 0; pointer-events: none; transition: .22s;
}
.site-toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ─────────────── 控制台 ─────────────── */
.cons-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px; margin-bottom: 24px; flex-wrap: wrap;
}
.key-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; padding: 13px 0;
  border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.key-row:last-child { border-bottom: 0; }
.key-main { min-width: 0; }
.key-label { font-size: 14px; font-weight: 500; margin-bottom: 3px; }
.key-val {
  display: block; font-size: 13px; color: var(--text-2);
  word-break: break-all;
}
.key-meta { font-size: 12px; color: var(--text-3); margin-top: 3px; }
.key-ops { display: flex; gap: 8px; flex: none; }
.key-state {
  display: inline-block; padding: 1px 8px; margin-left: 6px;
  border-radius: 999px; background: var(--surface-2);
  font-size: 11.5px; font-weight: 400; color: var(--text-2);
}
.key-state.is-off { background: #fbe9e9; color: var(--err); }

.snip-tabs { display: flex; gap: 6px; margin-bottom: 10px; }
.snip-tab {
  padding: 6px 13px; border: 1px solid var(--border-strong); border-radius: 8px;
  background: var(--bg); font-family: inherit; font-size: 13px;
  color: var(--text-2); cursor: pointer;
}
.snip-tab.is-on { background: var(--text); border-color: var(--text); color: #fff; }
.snip-wrap { position: relative; }
.snip-copy {
  position: absolute; right: 10px; top: 10px; z-index: 2;
  padding: 5px 12px; border-radius: 7px;
  border: 1px solid var(--border-strong); background: var(--bg);
  font-family: inherit; font-size: 12px; color: var(--text-2); cursor: pointer;
}
.snip-copy:hover { background: var(--surface-2); color: var(--text); }

/* ─────────────── 顶栏 ─────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-in { display: flex; align-items: center; gap: 26px; height: 60px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; font-size: 15px; text-decoration: none; }
.brand-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--text); color: #fff;
  display: grid; place-items: center; font-size: 14px;
}
.nav-links { display: flex; gap: 22px; margin-left: 6px; }
.nav-links a { font-size: 14px; color: var(--text-2); text-decoration: none; }
.nav-links a:hover { color: var(--text); }
.nav-cta { margin-left: auto; display: flex; gap: 10px; align-items: center; }

/* ─────────────── 按钮 ─────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 16px; border-radius: var(--radius-xs);
  border: 1px solid var(--border-strong); background: var(--bg);
  color: var(--text); font-size: 14px; font-weight: 500;
  text-decoration: none; cursor: pointer; transition: .16s;
  font-family: inherit;
}
.btn:hover { background: var(--surface-2); border-color: var(--text-3); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.sm { padding: 6px 12px; font-size: 13px; }

/* ─────────────── Hero ─────────────── */
.hero { padding: 68px 0 44px; }
.hero-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 44px; align-items: center; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 4px 11px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: 12.5px; color: var(--text-2); margin-bottom: 18px;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--warn); }
.hero h1 { font-size: 38px; font-weight: 650; margin: 0 0 16px; }
.hero p.lead { font-size: 16.5px; color: var(--text-2); margin: 0 0 26px; max-width: 30em; }
.hero-actions { display: flex; gap: 11px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--text-3); }

.code-card {
  background: var(--bg-app); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
  font-size: 12.5px; line-height: 1.85; color: var(--text-2);
  overflow-x: auto;
}
.code-card .k { color: var(--text-3); }
.code-card .hl { color: var(--text); font-weight: 500; }

/* ─────────────── 区块 ─────────────── */
.section { padding: 60px 0; }
.section.alt { background: var(--bg-app); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { margin-bottom: 30px; max-width: 46em; }
.section-head .eyebrow {
  font-size: 12px; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 9px;
}
.section-head h2 { font-size: 27px; font-weight: 650; margin: 0 0 11px; }
.section-head p { font-size: 15px; color: var(--text-2); margin: 0; }

.grid { display: grid; gap: 14px; }
.grid.c2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.c3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid.c4 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

.card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  transition: .16s;
}
.card.hover:hover { border-color: var(--text-3); transform: translateY(-2px); box-shadow: var(--shadow); }
.card h3 { font-size: 15.5px; font-weight: 600; margin: 0 0 8px; }
.card p { font-size: 14px; color: var(--text-2); margin: 0; }
.card .ico {
  width: 34px; height: 34px; border-radius: 9px; margin-bottom: 13px;
  background: var(--surface-2); color: var(--text);
  display: grid; place-items: center;
}
.card .ico svg { width: 18px; height: 18px; }

/* 场景列表 */
.scenes { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px,1fr)); gap: 12px; }
.scene {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 15px 17px;
}
.scene b { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 5px; }
.scene span { font-size: 13.5px; color: var(--text-2); }

/* ─────────────── 演示嵌入 ─────────────── */
.demo-frame {
  width: 100%; height: 680px; display: block;
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  background: var(--bg); box-shadow: var(--shadow);
}

/* ─────────────── 定价 ─────────────── */
.price {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px 20px;
  display: flex; flex-direction: column;
}
.price.featured { border: 2px solid var(--text); }
.price .tag {
  align-self: flex-start; padding: 2px 9px; border-radius: 999px;
  background: var(--text); color: #fff; font-size: 11.5px; margin-bottom: 12px;
}
.price h3 { font-size: 15px; font-weight: 600; margin: 0 0 10px; }
.price .amount { font-size: 30px; font-weight: 650; letter-spacing: -.02em; margin-bottom: 4px; }
.price .amount small { font-size: 14px; font-weight: 400; color: var(--text-3); }
.price .quota { font-size: 13px; color: var(--text-2); margin-bottom: 16px; }
.price ul { list-style: none; padding: 0; margin: 0 0 20px; font-size: 13.5px; color: var(--text-2); }
.price ul li { padding: 5px 0 5px 20px; position: relative; }
.price ul li::before {
  content: ""; position: absolute; left: 2px; top: 12px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--text-3);
}
.price .btn { margin-top: auto; justify-content: center; }

table.spec { width: 100%; border-collapse: collapse; font-size: 14px; }
table.spec th, table.spec td { border: 1px solid var(--border); padding: 10px 13px; text-align: left; }
table.spec th { background: var(--surface-2); font-weight: 600; }
table.spec td.num { font-family: var(--font-mono); }

/* ─────────────── 文档页 ─────────────── */
.doc h2 { font-size: 22px; font-weight: 650; margin: 44px 0 14px; padding-bottom: 9px; border-bottom: 1px solid var(--border); }
.doc h3 { font-size: 16px; font-weight: 600; margin: 26px 0 10px; }
.doc p { color: var(--text-2); margin: 0 0 14px; }
.doc ul, .doc ol { color: var(--text-2); padding-left: 22px; margin: 0 0 16px; }
.doc li { margin: 5px 0; }
.doc code:not(pre code) {
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 1.5px 6px; border-radius: 5px; font-size: 13px; color: var(--text);
}
pre.snippet {
  background: var(--bg-app); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 15px 17px;
  overflow-x: auto; font-size: 12.5px; line-height: 1.8; margin: 0 0 18px;
}
.note {
  background: var(--surface-2); border: 1px solid var(--border);
  border-left: 3px solid var(--text-3);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  padding: 13px 16px; font-size: 13.5px; color: var(--text-2); margin: 0 0 18px;
}
.note b { color: var(--text); }
.method {
  display: inline-block; font-family: var(--font-mono); font-size: 11.5px; font-weight: 600;
  background: var(--text); color: #fff; padding: 2px 8px; border-radius: 5px; margin-right: 8px;
}

/* ─────────────── FAQ ─────────────── */
.faq { display: grid; gap: 9px; max-width: 780px; }
.faq details {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 17px;
}
.faq summary { cursor: pointer; font-size: 14.5px; font-weight: 500; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; float: right; color: var(--text-3); }
.faq details[open] summary::after { content: "－"; }
.faq p { margin: 10px 0 0; font-size: 14px; color: var(--text-2); }

/* ─────────────── 收款码 ─────────────── */
.pay-box {
  background: var(--bg); border: 1px solid var(--border-strong);
  border-radius: var(--radius); padding: 22px;
  display: flex; gap: 24px; align-items: flex-start; flex-wrap: wrap;
}
.pay-box img { width: 190px; height: 190px; object-fit: contain; border-radius: var(--radius-xs); border: 1px solid var(--border); }
.pay-box .txt { flex: 1; min-width: 250px; }
.pay-box ol { font-size: 14px; color: var(--text-2); padding-left: 20px; margin: 10px 0 0; }
.pay-box ol li { margin: 6px 0; }

/* ─────────────── 页脚 ─────────────── */
.footer { border-top: 1px solid var(--border); padding: 34px 0 44px; background: var(--bg-app); }
.footer-in { display: flex; gap: 40px; flex-wrap: wrap; }
.footer .col { min-width: 150px; }
.footer h4 { font-size: 12.5px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .05em; margin: 0 0 11px; }
.footer a { display: block; font-size: 13.5px; color: var(--text-2); text-decoration: none; margin-bottom: 7px; }
.footer a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--border);
  font-size: 12.5px; color: var(--text-3); display: flex; gap: 14px; flex-wrap: wrap;
}

/* ============================================================
   高级感增强（v2）
   ============================================================ */

/* 选中色与滚动条 */
::selection { background: rgba(37,99,235,.14); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 8px; border: 2px solid #fff; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* 顶栏：更深的玻璃与底边过渡 */
.nav {
  background: rgba(255,255,255,.72);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
}
.brand-mark {
  background: linear-gradient(140deg, #2b3140, #0d0d10);
  box-shadow: 0 4px 12px rgba(20,24,33,.22);
}
.nav-links a { position: relative; transition: color .18s; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -5px;
  height: 1.5px; background: var(--text); transition: right .22s ease;
}
.nav-links a:hover::after { right: 0; }

/* 按钮：主按钮渐变 + 微动效 */
.btn { border-radius: 10px; }
.btn.primary {
  background: linear-gradient(180deg, #2b2d33, #141418);
  border-color: #141418;
  box-shadow: 0 1px 2px rgba(20,24,33,.18), 0 8px 20px -8px rgba(20,24,33,.45);
  transition: transform .18s cubic-bezier(.2,.7,.3,1), box-shadow .18s, background .18s;
}
.btn.primary:hover {
  background: linear-gradient(180deg, #3a3d45, #1d1d22);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(20,24,33,.2), 0 14px 28px -10px rgba(20,24,33,.5);
}
.btn:active { transform: translateY(0) scale(.985); }

/* Hero 标题：极弱的纵向渐变，增加层次 */
.hero h1 {
  background: linear-gradient(180deg, #15151a 0%, #2b3140 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.badge {
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  background: rgba(255,255,255,.6);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}
.badge .dot {
  background: var(--warn); box-shadow: 0 0 0 3px rgba(196,125,18,.12);
  animation: pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(196,125,18,.12); }
  50% { box-shadow: 0 0 0 6px rgba(196,125,18,.05); }
}

/* 代码卡片：玻璃 + 顶部微光 */
.code-card {
  position: relative;
  background: rgba(250,251,252,.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,.9);
  overflow: hidden;
}
.code-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37,99,235,.35), transparent);
}

/* 卡片：半透明玻璃、悬浮上浮 */
.card {
  background: rgba(255,255,255,.74);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.85);
}
.card.hover {
  transition: transform .22s cubic-bezier(.2,.7,.3,1), border-color .22s, box-shadow .22s;
}
.card.hover:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 14px 36px -12px rgba(20,24,33,.18), inset 0 1px 0 rgba(255,255,255,.9);
}
.card .ico {
  background: linear-gradient(150deg, #f3f4f7, #e6e8ec);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.9);
}

/* 场景条 */
.scene {
  background: rgba(255,255,255,.74);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: transform .2s ease, border-color .2s;
}
.scene:hover { transform: translateY(-2px); border-color: var(--border-strong); }

/* 定价卡 */
.price {
  background: rgba(255,255,255,.78);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: transform .22s cubic-bezier(.2,.7,.3,1), box-shadow .22s, border-color .22s;
}
.price:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.price.featured {
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(255,255,255,.9), rgba(255,255,255,.9)) padding-box,
    linear-gradient(160deg, rgba(29,29,31,.85), rgba(37,99,235,.55)) border-box;
  box-shadow: 0 18px 46px -18px rgba(20,24,33,.4);
}
.price.featured .tag {
  background: linear-gradient(135deg, #1f2330, #2f4db8);
}

/* FAQ */
.faq details {
  background: rgba(255,255,255,.74);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color .2s, box-shadow .2s;
}
.faq details[open] { border-color: var(--border-strong); box-shadow: var(--shadow); }

/* 表格 / 文档片段轻微玻璃感 */
pre.snippet {
  background: rgba(247,248,250,.85);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}

/* 滚动进场：JS 生效时才给初始态，避免无 JS 白屏 */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1);
  will-change: opacity, transform;
}
.js-reveal .reveal.is-in { opacity: 1; transform: none; }

/* 区块半透明略加深，玻璃层叠时仍能区分 */
.section.alt { background: rgba(247,248,250,.6); }
.footer { background: rgba(247,248,250,.66); }

/* ─────────────── 响应式 ─────────────── */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero { padding: 44px 0 32px; }
  .hero h1 { font-size: 29px; }
  .nav-links { display: none; }
  .demo-frame { height: 560px; }
  .section { padding: 44px 0; }
  .wrap { padding: 0 18px; }
}