/* ============================================================
   月石 MoonStone 官网 · main.css
   来源：月石MoonStone官网.design/pages/index-heritage-v3.html
   结构：① 设计令牌 :root → ② [data-icon] → ③ 关键布局样式
   ============================================================ */

/* ============ 设计令牌（theme-vars） ============ */
:root {
  /* ============ Brand Primary (single hue) ============ */
  --brand-primary: #007aff;
  --brand-primary-ink: #ffffff;
  --brand-primary-hover: #0062d6;
  --brand-primary-active: #0052b8;
  --brand-primary-soft: #e8f2ff;

  /* ============ Neutral Scale (Apple system gray) ============ */
  --brand-background: #f5f5f7;
  --brand-foreground: #1d1d1f;
  --brand-card: #ffffff;
  --brand-card-foreground: #1d1d1f;
  --brand-popover: #ffffff;
  --brand-popover-foreground: #1d1d1f;
  --brand-muted: #f2f2f7;
  --brand-muted-foreground: #6e6e73;
  --brand-accent-surface: #ececf1;
  --brand-surface: #ffffff;
  --brand-surface-2: #f2f2f7;
  --brand-ink: #1d1d1f;
  --brand-ink-2: #6e6e73;
  --brand-ink-3: #86868b;
  --brand-line: #d2d2d7;
  --brand-border: #d2d2d7;
  --brand-input: #d2d2d7;
  --brand-ring: #007aff;
  --brand-dark-bg: #0b0b0f;
  --brand-dark-card: #15151a;
  --brand-dark-ink: #f5f5f7;
  --brand-dark-ink-2: #a1a1a6;

  /* ============ State Colors (status only) ============ */
  --state-success: #34c759;
  --state-warning: #ff9f0a;
  --state-error: #ff3b30;
  --state-info: #0a84ff;

  /* ============ Radius ============ */
  --brand-radius-sm: 4px;
  --brand-radius-md: 10px;
  --brand-radius-lg: 16px;
  --brand-radius-pill: 999px;

  /* ============ Shadows (subtle, alpha <= 0.05 for static) ============ */
  --brand-shadow-1: 0 1px 2px rgba(0, 0, 0, 0.04);
  --brand-shadow-2: 0 8px 24px -8px rgba(0, 0, 0, 0.12);
  --brand-shadow-3: 0 24px 60px -20px rgba(0, 0, 0, 0.18);

  /* ============ Typography ============ */
  --brand-font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Inter, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --brand-font-mono: "SF Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* ============ Spacing rhythm ============ */
  --brand-spacing-1: 4px;
  --brand-spacing-2: 8px;
  --brand-spacing-3: 12px;
  --brand-spacing-4: 16px;
  --brand-spacing-5: 24px;
  --brand-spacing-6: 32px;
  --brand-spacing-7: 48px;
  --brand-spacing-8: 80px;
  --brand-spacing-9: 120px;
}

/* ============ 图标（data-icon 蒙版方案） ============ */
[data-icon] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  background-color: currentColor;
}

/* ============ 全局基础 ============ */
html { scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: var(--brand-background); color: var(--brand-foreground); font-family: var(--brand-font-sans); -webkit-font-smoothing: antialiased; }
body, .font-sans { font-family: var(--brand-font-sans); }
*, *::before, *::after { box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: clip; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; margin: 0; padding: 0; }
p, h1, h2, h3 { margin: 0; }
section[id] { scroll-margin-top: 88px; }

.ms-container { max-width: 1280px; margin-inline: auto; padding-inline: 24px; }
@media (max-width: 639px) { .ms-container { padding-inline: 16px; } }
.ms-section { padding-block: 96px; }
@media (max-width: 767px) { .ms-section { padding-block: 64px; } }

/* ============ 字号层级（display / heading / body / caption） ============ */
.ms-d1 { font-size: clamp(44px, 6vw, 80px); font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; text-wrap: balance; word-break: keep-all; }
.ms-d2 { font-size: clamp(32px, 3.5vw, 56px); font-weight: 600; line-height: 1.22; letter-spacing: -0.015em; text-wrap: balance; word-break: keep-all; }
.ms-d3 { font-size: clamp(34px, 4vw, 52px); font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.ms-h2 { font-size: clamp(28px, 3.2vw, 40px); font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; text-wrap: balance; word-break: keep-all; }
.ms-h3 { font-size: 24px; font-weight: 600; line-height: 1.3; }
.ms-h4 { font-size: 20px; font-weight: 600; line-height: 1.3; }
.ms-h5 { font-size: 18px; font-weight: 600; line-height: 1.3; }
.ms-b1 { font-size: 18px; font-weight: 400; line-height: 1.6; }
.ms-b2 { font-size: 16px; font-weight: 400; line-height: 1.6; }
.ms-b3 { font-size: 15px; font-weight: 400; line-height: 1.6; }
.ms-c1 { font-size: 13px; font-weight: 400; line-height: 1.55; }
.ms-logo-en { font-weight: 400; }

.ms-eyebrow { display: inline-block; font-size: 14px; font-weight: 600; color: var(--brand-primary); letter-spacing: 0.05em; margin-bottom: 14px; }

/* ============ 焦点可见性 ============ */
a:focus-visible, button:focus-visible { outline: 2px solid var(--brand-ring); outline-offset: 2px; }

/* ============ 按钮 ============ */
.ms-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: var(--brand-radius-md); font-size: 15px; font-weight: 600; line-height: 1; white-space: nowrap; transition: background-color .2s, border-color .2s, color .2s; }
.ms-btn svg { width: 16px; height: 16px; transition: transform .2s; }
.ms-btn:hover svg { transform: translateX(2px); }
.ms-btn-primary { background: var(--brand-primary); color: var(--brand-primary-ink); padding: 14px 28px; border: none; }
.ms-btn-primary:hover { background: var(--brand-primary-hover); }
.ms-btn-primary:active { background: var(--brand-primary-active); }
.ms-btn-secondary { background: transparent; color: var(--brand-foreground); border: 1px solid var(--brand-line); padding: 13px 27px; }
.ms-btn-secondary:hover { background: var(--brand-card); border-color: var(--brand-ink-2); }

/* ============ 顶部导航 ============ */
.ms-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 60; background: color-mix(in srgb, var(--brand-background) 78%, transparent); -webkit-backdrop-filter: blur(20px) saturate(180%); backdrop-filter: blur(20px) saturate(180%); border-bottom: 1px solid transparent; transition: background-color .25s, border-color .25s; }
.ms-nav.scrolled { background: var(--brand-card); border-bottom-color: var(--brand-line); }
.ms-nav-inner { max-width: 1280px; margin-inline: auto; padding-inline: 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
@media (max-width: 639px) { .ms-nav-inner { padding-inline: 16px; } }
.ms-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; letter-spacing: -0.01em; color: var(--brand-foreground); }
.ms-logo-img { width: 56px; height: 56px; display: block; flex-shrink: 0; }
.ms-nav-right { display: flex; align-items: center; gap: 28px; }
.ms-nav-links { display: flex; align-items: center; gap: 28px; }
.ms-nav-links a { font-size: 14px; font-weight: 400; color: var(--brand-foreground); padding-block: 4px; transition: color .2s; }
.ms-nav-links a:hover { color: var(--brand-primary); }
.ms-nav-cta { padding: 9px 18px; font-size: 14px; }
.ms-nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--brand-radius-md); border: 1px solid var(--brand-line); background: var(--brand-card); color: var(--brand-foreground); }
.ms-nav-toggle svg { width: 22px; height: 22px; }
@media (max-width: 1023px) { .ms-nav-links { display: none; } .ms-nav-toggle { display: inline-flex; } }
.ms-mobile-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--brand-card); border-bottom: 1px solid var(--brand-line); padding: 4px 16px 12px; }
.ms-mobile-menu.open { display: block; }
.ms-mobile-menu a { display: block; padding: 13px 8px; font-size: 15px; font-weight: 400; color: var(--brand-foreground); border-bottom: 1px solid var(--brand-line); transition: color .2s; }
.ms-mobile-menu a:hover { color: var(--brand-primary); }
.ms-mobile-menu a:last-child { border-bottom: none; }
@media (min-width: 1024px) { .ms-mobile-menu { display: none !important; } }

/* ============ Hero（完整截图产品舞台） ============ */
.ms-hero { padding-top: 160px; padding-bottom: 120px; background: var(--brand-background); }
@media (max-width: 1023px) { .ms-hero { padding-top: 128px; padding-bottom: 96px; } }
.ms-hero-grid { display: grid; grid-template-columns: 1fr; gap: 56px; align-items: center; }
@media (min-width: 1024px) { .ms-hero-grid { grid-template-columns: 1.1fr 0.9fr; gap: 64px; } }
.ms-hero-copy { max-width: 640px; }
.ms-hero-sub { margin-top: 22px; color: var(--brand-ink-2); }
.ms-hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }
.ms-trust { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 44px; }
.ms-trust-item { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--brand-ink-2); }
.ms-trust-item svg { width: 14px; height: 14px; color: var(--brand-primary); flex-shrink: 0; }
.ms-hero-media { position: relative; width: 100%; max-width: 440px; margin-inline: auto; }
.ms-hero-shot { width: min(360px, 100%); margin-inline: auto; border-radius: var(--brand-radius-lg); background: transparent; }
.ms-hero-shot img { width: 100%; height: auto; display: block; border-radius: var(--brand-radius-lg); aspect-ratio: 1349 / 2760; }
.ms-float-card { position: absolute; width: 220px; display: flex; gap: 12px; align-items: flex-start; background: var(--brand-surface); border: 1px solid var(--brand-line); border-radius: var(--brand-radius-md); padding: 14px 16px; box-shadow: var(--brand-shadow-2); }
.ms-float-card svg { width: 18px; height: 18px; color: var(--brand-primary); flex-shrink: 0; margin-top: 2px; }
.ms-float-title { font-size: 13px; font-weight: 600; line-height: 1.45; color: var(--brand-foreground); }
.ms-float-sub { margin-top: 3px; font-size: 12px; line-height: 1.5; color: var(--brand-ink-2); }
.ms-float-1 { top: -22px; left: -22px; transform: rotate(-2deg); }
.ms-float-2 { bottom: -22px; right: -22px; transform: rotate(2deg); }
@media (max-width: 1023px) { .ms-float-card { display: none; } }

/* ============ KPI 条 ============ */
.ms-kpi-wrap { background: var(--brand-card); padding-block: 96px; }
@media (max-width: 767px) { .ms-kpi-wrap { padding-block: 56px; } }
.ms-kpi { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--brand-line); border-bottom: 1px solid var(--brand-line); }
@media (min-width: 1024px) { .ms-kpi { grid-template-columns: repeat(4, 1fr); } }
.ms-kpi-item { padding: 36px 24px; }
.ms-kpi-item:nth-child(even) { border-left: 1px solid var(--brand-line); }
.ms-kpi-item:nth-child(n+3) { border-top: 1px solid var(--brand-line); }
@media (min-width: 1024px) { .ms-kpi-item:nth-child(n+3) { border-top: none; } .ms-kpi-item:nth-child(n+2) { border-left: 1px solid var(--brand-line); } }
.ms-kpi-text { font-size: clamp(18px, 2vw, 26px); font-weight: 600; line-height: 1.4; letter-spacing: -0.01em; color: var(--brand-foreground); }
.ms-kpi-sub { margin-top: 10px; font-size: 13px; line-height: 1.55; color: var(--brand-ink-2); }

/* ============ 核心服务 ============ */
.ms-services-grid { display: grid; grid-template-columns: 1fr; gap: 48px; }
@media (min-width: 1024px) { .ms-services-grid { grid-template-columns: 4fr 8fr; gap: 80px; } }
.ms-services-intro { align-self: start; }
@media (min-width: 1024px) { .ms-services-intro { position: sticky; top: 96px; } }
.ms-intro-text { margin-top: 20px; color: var(--brand-ink-2); max-width: 30em; }
.ms-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 32px; font-size: 15px; font-weight: 600; color: var(--brand-primary); }
.ms-link svg { width: 16px; height: 16px; transition: transform .2s; }
.ms-link:hover svg { transform: translateX(2px); }
.ms-svc-list { border-bottom: 1px solid var(--brand-line); }
.ms-svc-row { display: flex; align-items: flex-start; gap: 20px; padding: 26px 20px; border-bottom: 1px solid var(--brand-line); border-radius: var(--brand-radius-lg); transition: background-color .2s, transform .2s, box-shadow .2s; }
.ms-svc-row:last-child { border-bottom: none; }
.ms-svc-row:hover { background: var(--brand-card); transform: translateY(-2px); box-shadow: var(--brand-shadow-1); }
.ms-svc-icon { width: 48px; height: 48px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border: 1px solid var(--brand-line); border-radius: var(--brand-radius-pill); color: var(--brand-foreground); background: transparent; transition: color .2s, border-color .2s, background-color .2s; }
.ms-svc-icon svg { width: 20px; height: 20px; }
.ms-svc-row:hover .ms-svc-icon { color: var(--brand-primary); border-color: color-mix(in srgb, var(--brand-primary) 45%, var(--brand-line)); background: var(--brand-primary-soft); }
.ms-svc-body { flex: 1; min-width: 0; }
.ms-svc-body p { margin-top: 6px; color: var(--brand-ink-2); }
.ms-svc-chevron { width: 20px; height: 20px; color: var(--brand-ink-3); flex-shrink: 0; margin-top: 14px; transition: transform .2s, color .2s; }
.ms-svc-row:hover .ms-svc-chevron { color: var(--brand-primary); transform: translateX(3px); }

/* ============ 案例展示 · 完整截图 ============ */
.ms-cases-head { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 48px; }
@media (min-width: 1024px) { .ms-cases-head { grid-template-columns: 7fr 5fr; align-items: end; gap: 48px; } }
.ms-cases-head .ms-b2 { color: var(--brand-ink-2); }
.ms-case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (min-width: 1024px) { .ms-case-grid { grid-template-columns: repeat(4, 1fr); gap: 24px; } }
.ms-case-tile { min-width: 0; transition: transform .25s; }
.ms-case-tile:hover { transform: translateY(-2px); }
.ms-case-shot { border-radius: var(--brand-radius-lg); background: transparent; }
.ms-case-shot img { width: 100%; height: auto; display: block; border-radius: var(--brand-radius-lg); aspect-ratio: 1349 / 2760; }
.ms-case-tile-body { padding: 16px 2px 0; }
.ms-case-tag { display: inline-block; background: var(--brand-primary-soft); color: var(--brand-primary); font-size: 13px; font-weight: 600; line-height: 1.45; padding: 4px 11px; border-radius: var(--brand-radius-pill); }
.ms-case-tile-desc { margin-top: 12px; color: var(--brand-ink-2); }

/* ============ 扫码体验模块 ============ */
.ms-qr-module { margin-top: 72px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.ms-qr-box-img { width: 176px; height: 176px; display: flex; align-items: center; justify-content: center; background: transparent; border-radius: var(--brand-radius-md); padding: 8px; }
.ms-qr-box-img img { width: 100%; height: 100%; display: block; border-radius: var(--brand-radius-sm); }
.ms-qr-title { margin-top: 22px; }
.ms-qr-sub { margin-top: 8px; color: var(--brand-ink-2); }

/* ============ 开发流程 ============ */
.ms-section-head-center { text-align: center; margin-bottom: 64px; }
.ms-process-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 768px) { .ms-process-grid { grid-template-columns: repeat(3, 1fr); } }
.ms-step { background: var(--brand-card); border-radius: var(--brand-radius-lg); padding: 32px; transition: transform .25s, box-shadow .25s; }
.ms-step:hover { transform: translateY(-4px); box-shadow: var(--brand-shadow-2); }
.ms-step-num { font-size: 56px; font-weight: 700; line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; color: color-mix(in srgb, var(--brand-ink) 26%, transparent); }
.ms-step .ms-h5 { margin-top: 18px; }
.ms-step-desc { margin-top: 8px; color: var(--brand-ink-2); }

/* ============ 关于我们 ============ */
.ms-about-grid { display: grid; grid-template-columns: 1fr; gap: 48px; }
@media (min-width: 1024px) { .ms-about-grid { grid-template-columns: 1fr 1fr; gap: 96px; } }
.ms-about-desc { color: var(--brand-ink-2); }
.ms-values { display: grid; grid-template-columns: 1fr; gap: 36px; margin-top: 56px; }
@media (min-width: 768px) { .ms-values { grid-template-columns: repeat(3, 1fr); gap: 32px; } }
.ms-value svg { width: 22px; height: 22px; color: var(--brand-primary); }
.ms-value .ms-h5 { margin-top: 14px; }
.ms-value-desc { margin-top: 6px; color: var(--brand-ink-2); }

/* ============ 联系合作（深色） ============ */
.ms-contact { background: var(--brand-dark-bg); color: var(--brand-dark-ink); }
.ms-contact-head { text-align: center; margin-bottom: 72px; }
.ms-contact-title { color: var(--brand-dark-ink); }
.ms-contact-sub { margin-top: 16px; font-size: 16px; line-height: 1.6; color: var(--brand-dark-ink-2); }
.ms-contact-grid { display: grid; grid-template-columns: 1fr; gap: 56px; }
@media (min-width: 1024px) { .ms-contact-grid { grid-template-columns: 1fr 1fr; gap: 96px; } }
.ms-contact-h3 { font-size: 18px; font-weight: 600; color: var(--brand-dark-ink); margin-bottom: 8px; }
.ms-contact-line { display: flex; gap: 14px; align-items: flex-start; padding-block: 18px; border-bottom: 1px solid color-mix(in srgb, var(--brand-dark-ink-2) 22%, transparent); }
.ms-contact-line svg { width: 18px; height: 18px; color: var(--brand-dark-ink-2); flex-shrink: 0; margin-top: 3px; }
.ms-cl-main { font-size: 15px; font-weight: 600; color: var(--brand-dark-ink); }
.ms-cl-sub { margin-top: 3px; font-size: 13px; color: var(--brand-dark-ink-2); }
.ms-contact-qr { margin-top: 28px; }
.ms-contact-qr img { width: 200px; height: 200px; display: block; border-radius: var(--brand-radius-md); }
.ms-qr-caption { margin-top: 16px; }
.ms-contact-qr .ms-cl-sub { margin-top: 4px; }
.ms-field-group { margin-bottom: 24px; }
.ms-label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; color: var(--brand-dark-ink); }
.ms-field { width: 100%; background: var(--brand-dark-card); border: 1px solid color-mix(in srgb, var(--brand-dark-ink-2) 30%, transparent); border-radius: var(--brand-radius-md); padding: 13px 16px; color: var(--brand-dark-ink); font-size: 15px; font-family: inherit; transition: border-color .2s, box-shadow .2s; }
.ms-field::placeholder { color: var(--brand-dark-ink-2); }
.ms-field:focus { outline: none; border-color: var(--brand-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-primary) 28%, transparent); }
.ms-field.ms-error { border-color: var(--state-error); }
.ms-field-area { resize: vertical; min-height: 120px; }
.ms-error-text { display: none; margin-top: 7px; font-size: 13px; color: var(--state-error); }
.ms-error-text.show { display: block; }
.ms-form-submit { width: 100%; margin-top: 8px; }
.ms-form-status { margin-top: 16px; font-size: 14px; line-height: 1.6; }
.ms-form-status.success { color: var(--brand-dark-ink); }
.ms-form-status.error { color: var(--state-error); }

/* ============ Footer ============ */
.ms-footer { background: var(--brand-dark-bg); color: var(--brand-dark-ink-2); border-top: 1px solid color-mix(in srgb, var(--brand-dark-ink-2) 20%, transparent); }
.ms-footer-grid { display: grid; grid-template-columns: 1fr; gap: 44px; padding-block: 64px 48px; }
@media (min-width: 768px) { .ms-footer-grid { grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 32px; } }
.ms-footer-brand .ms-logo { color: var(--brand-dark-ink); }
.ms-footer-brand .ms-logo-img { filter: brightness(0) invert(1); opacity: 0.95; }
.ms-footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.6; max-width: 24em; }
.ms-footer-h { font-size: 14px; font-weight: 600; color: var(--brand-dark-ink); margin-bottom: 14px; }
.ms-footer-link { display: block; padding-block: 6px; font-size: 14px; color: var(--brand-dark-ink-2); transition: color .2s; }
.ms-footer-link:hover { color: var(--brand-dark-ink); }
.ms-footer-text { padding-block: 6px; font-size: 14px; }
.ms-footer-bottom { border-top: 1px solid color-mix(in srgb, var(--brand-dark-ink-2) 20%, transparent); padding-block: 24px; font-size: 13px; line-height: 1.6; }
.ms-footer-bottom a { color: var(--brand-dark-ink-2); text-decoration: none; transition: color .2s; }
.ms-footer-bottom a:hover { color: var(--brand-dark-ink); }

/* ============ 动效 ============ */
.ms-hero-fade { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s ease; }
body.js .ms-hero-fade { opacity: 0; transform: translateY(14px); }
body.js.loaded .ms-hero-fade { opacity: 1; transform: none; }
.ms-reveal { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s ease; }
body.js .ms-reveal { opacity: 0; transform: translateY(24px); }
body.js .ms-reveal.revealed { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
    .ms-hero-fade, .ms-reveal { opacity: 1 !important; transform: none !important; }
}