/* =========================================================================
   图图爱做图 · 落地页样式
   设计令牌 -> @font-face -> 基础 -> 组件 -> 分区 -> 响应式 -> 动效
   配色：品牌天蓝 + 暖橙 CTA；移动优先，PC 自适应
   ========================================================================= */

/* ---------- 自托管 DM Sans（西文/数字，font-display:swap，国内可达） ---------- */
@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/dm-sans-400.woff2") format("woff2");
}
@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/dm-sans-500.woff2") format("woff2");
}
@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/dm-sans-700.woff2") format("woff2");
}

/* ---------- 设计令牌 ---------- */
:root {
  /* 品牌色 */
  --color-primary: #0EA5E9;
  --color-primary-light: #38BDF8;
  --color-primary-deep: #0C4A6E;
  --color-cta: #F97316;
  --color-cta-deep: #EA580C;

  /* 背景与文字 */
  --color-bg: #FFFFFF;
  --color-bg-tint: #F0F9FF;
  --color-text: #0C4A6E;
  --color-text-muted: #475569;
  --color-border: #E2E8F0;

  /* 派生 */
  --color-text-invert: #F0F9FF;
  --color-cta-soft: rgba(249, 115, 22, .14);
  --color-primary-soft: rgba(14, 165, 233, .10);

  /* 尺寸 */
  --max-w: 1120px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-sm: 10px;

  /* 阴影（柔和多层；hover 加深不位移） */
  --shadow-card: 0 4px 16px rgba(2, 132, 199, .08);
  --shadow-card-hover: 0 10px 30px rgba(2, 132, 199, .16);
  --shadow-cta: 0 8px 20px rgba(249, 115, 22, .28);
  --shadow-cta-hover: 0 12px 28px rgba(249, 115, 22, .42);
  --shadow-soft: 0 1px 2px rgba(2, 132, 199, .06);

  /* 字体 */
  --font-latin: "DM Sans", -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-zh: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;

  /* 间距（4 的倍数） */
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-12: 48px;
  --sp-16: 64px;

  /* 过渡 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --t-fast: 150ms var(--ease);
  --t-mid: 220ms var(--ease);
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-zh);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-latin);
  color: var(--color-text);
  line-height: 1.2;
  margin: 0;
  letter-spacing: -.01em;
}

p { margin: 0; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover { color: var(--color-primary-deep); }

img { display: block; max-width: 100%; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button { font-family: inherit; }

/* 所有可点元素 cursor:pointer */
a,
button,
label,
input[type="radio"],
input[type="checkbox"],
[role="button"] { cursor: pointer; }

input[type="email"],
input[type="tel"],
input[type="text"] { cursor: text; }

/* ---------- 无障碍工具类 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* honeypot 视觉隐藏 */
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -60px;
  transform: translateX(-50%);
  z-index: 100;
  background: var(--color-primary-deep);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 700;
  transition: top var(--t-fast);
}
.skip-link:focus {
  top: 0;
  color: #fff;
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
}

/* 统一可见焦点 */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

.section {
  padding-block: var(--sp-16);
  background: var(--color-bg);
}
.section--tint { background: var(--color-bg-tint); }

.section__head {
  max-width: 720px;
  margin: 0 auto var(--sp-12);
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: var(--sp-4);
}
.section__eyebrow--invert {
  color: #fff;
  background: rgba(255, 255, 255, .18);
}
.section__title {
  font-size: clamp(26px, 4.5vw, 40px);
  font-weight: 700;
}
.section__title--invert { color: #fff; }
.section__lead {
  margin-top: var(--sp-4);
  font-size: 16px;
  color: var(--color-text-muted);
}

/* ---------- 图标 ---------- */
.icon {
  width: 24px;
  height: 24px;
  flex: none;
}
.icon-inline {
  width: 18px;
  height: 18px;
  vertical-align: -3px;
}

/* ---------- 按钮 ---------- */
.btn {
  --btn-pad-y: 12px;
  --btn-pad-x: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border: 1px solid transparent;
  border-radius: var(--radius);
  text-align: center;
  white-space: nowrap;
  transition: background-color var(--t-mid), box-shadow var(--t-mid), color var(--t-mid), border-color var(--t-mid);
}
.btn:hover { color: #fff; }

.btn-lg {
  --btn-pad-y: 16px;
  --btn-pad-x: 30px;
  font-size: 16px;
}
.btn-block { width: 100%; }

/* 主 CTA 暖橙 */
.btn-cta {
  background: var(--color-cta);
  color: #fff;
  box-shadow: var(--shadow-cta);
}
.btn-cta:hover {
  background: var(--color-cta-deep);
  color: #fff;
  box-shadow: var(--shadow-cta-hover);
}
.btn-cta:active { background: var(--color-cta-deep); }

/* 次级幽灵按钮（描边天蓝） */
.btn-ghost {
  background: #fff;
  color: var(--color-primary-deep);
  border-color: var(--color-border);
  box-shadow: var(--shadow-soft);
}
.btn-ghost:hover {
  color: var(--color-primary-deep);
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-card);
}

/* 文字链接按钮（Hero 用，白底深色场景自适配） */
.btn-link {
  background: transparent;
  color: var(--color-text-invert);
  border-color: rgba(240, 249, 255, .45);
}
.btn-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .8);
}

/* =========================================================================
   S1 Hero
   ========================================================================= */
.hero {
  position: relative;
  isolation: isolate;
  color: var(--color-text-invert);
  padding-block: calc(var(--sp-16) + 56px) var(--sp-16);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 120% at 85% -10%, rgba(56, 189, 248, .55) 0%, transparent 55%),
    linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 52%, var(--color-primary-light) 100%);
  background-size: 160% 160%, 200% 200%;
  animation: heroPan 11s var(--ease) infinite alternate;
}
/* 细腻网格叠加，增加质感 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 75%);
          mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero__inner {
  display: grid;
  gap: var(--sp-12);
  align-items: center;
}
.hero__copy { max-width: 640px; }

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-latin);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: .04em;
  color: #fff;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .22);
  padding: 7px 14px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.hero__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #BBF7D0;
  box-shadow: 0 0 0 0 rgba(187, 247, 208, .7);
  animation: pulse 2.4s var(--ease) infinite;
}
.hero__title {
  margin-top: var(--sp-6);
  font-size: clamp(28px, 7vw, 54px);
  font-weight: 700;
  color: #fff;
  line-height: 1.18;
  letter-spacing: -.02em;
}
.hero__title-accent {
  display: inline-block;
  margin-top: 6px;
  background: linear-gradient(90deg, #FFFFFF 0%, #E0F2FE 60%, #BAE6FD 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #E0F2FE;
}
.hero__subtitle {
  margin-top: var(--sp-6);
  font-size: clamp(15px, 2.4vw, 18px);
  line-height: 1.7;
  color: rgba(240, 249, 255, .9);
  max-width: 560px;
}
.hero__actions {
  margin-top: var(--sp-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  align-items: center;
}
.hero__trust {
  margin-top: var(--sp-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3) var(--sp-6);
}
.hero__trust li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(240, 249, 255, .92);
}
.hero__trust .icon {
  width: 20px;
  height: 20px;
  color: #BBF7D0;
}

/* before / after */
.hero__demo {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  align-items: center;
}
.ba-card {
  position: relative;
  margin: 0;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: var(--radius-lg);
  padding: var(--sp-3);
  backdrop-filter: blur(8px);
}
.ba-card--after {
  background: rgba(255, 255, 255, .96);
  border-color: rgba(255, 255, 255, .9);
  box-shadow: 0 18px 50px rgba(2, 30, 60, .35);
}
.ba-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.ba-card__media--before {
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, .06) 0 12px, rgba(255, 255, 255, .02) 12px 24px),
    linear-gradient(160deg, #1E3A5F 0%, #0C4A6E 100%);
}
.ba-card__media--after {
  background:
    radial-gradient(90% 90% at 30% 10%, rgba(56, 189, 248, .25), transparent 60%),
    linear-gradient(150deg, #E0F2FE 0%, #FFFFFF 55%, #F0F9FF 100%);
}
.ba-card__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}
.ba-card__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(240, 249, 255, .8);
  font-family: var(--font-latin);
  font-weight: 700;
  font-style: normal;
}
.ba-card__placeholder svg { width: 40px; height: 40px; }
.ba-card__placeholder em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: .02em;
}
.ba-card__placeholder--light { color: var(--color-primary); }
.ba-card__cap {
  margin-top: var(--sp-3);
  padding-inline: 6px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(240, 249, 255, .85);
  text-align: center;
}
.ba-card--after .ba-card__cap { color: var(--color-text-muted); }
.ba-card__badge {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: .04em;
  color: #fff;
  background: var(--color-cta);
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: 0 4px 10px rgba(249, 115, 22, .4);
}
.ba-arrow {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin: -4px auto;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .3);
  transform: rotate(90deg);
}
.ba-arrow svg { width: 22px; height: 22px; }

/* =========================================================================
   S2 痛点共鸣 / 通用卡片
   ========================================================================= */
.grid { display: grid; gap: var(--sp-6); }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--t-mid), border-color var(--t-mid);
}
.card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-light);
}
.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  color: var(--color-primary);
  background: var(--color-primary-soft);
  margin-bottom: var(--sp-4);
}
.card__icon svg { width: 28px; height: 28px; }
.card__title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: var(--sp-2);
}
.card__desc {
  font-size: 15px;
  color: var(--color-text-muted);
}
.pain-card { border-top: 3px solid var(--color-primary); }

/* =========================================================================
   S3 如何工作 / 步骤
   ========================================================================= */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
  counter-reset: step;
}
.step {
  position: relative;
  display: flex;
  gap: var(--sp-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--t-mid), border-color var(--t-mid);
}
.step:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-light);
}
.step__num {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-deep) 100%);
  box-shadow: 0 6px 14px rgba(14, 165, 233, .3);
}
.step__body { min-width: 0; }
.step__icon {
  display: inline-flex;
  color: var(--color-primary);
  margin-bottom: var(--sp-2);
}
.step__icon svg { width: 24px; height: 24px; }
.step__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}
.step__desc {
  font-size: 15px;
  color: var(--color-text-muted);
}

/* =========================================================================
   S4 效果展示
   ========================================================================= */
.showcase__grid { margin-bottom: var(--sp-12); }

.shot {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--t-mid), border-color var(--t-mid);
}
.shot:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-light);
}
.shot__media {
  position: relative;
  aspect-ratio: 3 / 4;
  display: grid;
  place-items: center;
}
.shot__media--a { background: linear-gradient(155deg, #FFEDD5 0%, #FED7AA 100%); }
.shot__media--b { background: linear-gradient(155deg, #E0F2FE 0%, #BAE6FD 100%); }
.shot__media--c { background: linear-gradient(155deg, #DCFCE7 0%, #BBF7D0 100%); }
.shot__media--d { background: linear-gradient(155deg, #EDE9FE 0%, #DDD6FE 100%); }
.shot__index {
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 44px;
  color: rgba(12, 74, 110, .22);
  letter-spacing: .02em;
}
.shot__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 11px;
  color: var(--color-primary-deep);
  background: rgba(255, 255, 255, .85);
  padding: 4px 9px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}
.shot__cap {
  padding: var(--sp-4);
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-latin);
  color: var(--color-text);
  text-align: center;
}

/* 多尺寸适配 */
.sizes {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  box-shadow: var(--shadow-card);
}
.sizes__head { text-align: center; margin-bottom: var(--sp-8); }
.sizes__title { font-size: 20px; font-weight: 700; }
.sizes__hint {
  margin-top: var(--sp-2);
  font-size: 14px;
  color: var(--color-text-muted);
}
.sizes__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-end;
  gap: var(--sp-8);
}
.size-chip { margin: 0; text-align: center; }
.size-chip__frame {
  display: grid;
  place-items: center;
  margin: 0 auto var(--sp-3);
  border-radius: var(--radius-sm);
  background:
    radial-gradient(90% 90% at 30% 10%, rgba(56, 189, 248, .22), transparent 60%),
    linear-gradient(150deg, #E0F2FE 0%, #FFFFFF 60%);
  border: 2px dashed var(--color-primary-light);
  color: var(--color-primary);
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 13px;
}
.size-chip__frame--vertical { width: 90px; height: 160px; }
.size-chip__frame--square { width: 130px; height: 130px; }
.size-chip__frame--portrait { width: 120px; height: 160px; }
.size-chip figcaption {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.showcase__note {
  margin-top: var(--sp-8);
  text-align: center;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* --- 占位区真实示意图填充：有图时显示图片、隐藏图标/编号占位 --- */
.ba-card__img { object-fit: cover; }
.ba-card__media--filled .ba-card__img { opacity: 1; }
.ba-card__media--filled .ba-card__placeholder { display: none; }

.shot__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.shot__media--filled .shot__index { display: none; }

.size-chip__frame--filled {
  background-image: url("../img/ba-after.jpg");
  background-size: cover;
  background-position: center;
  border-style: solid;
  border-color: rgba(2, 30, 60, .08);
}
.size-chip__frame--filled > span { display: none; }
.showcase__note .icon-inline { color: var(--color-primary); }

/* =========================================================================
   S5 价值对比
   ========================================================================= */
.compare {
  max-width: 880px;
  margin-inline: auto;
}
.compare__table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.compare__table th,
.compare__table td {
  padding: var(--sp-4) var(--sp-6);
  text-align: left;
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
}
.compare__table thead th {
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-primary-deep);
  background: var(--color-bg-tint);
}
.compare__table tbody th {
  font-weight: 700;
  color: var(--color-text);
  width: 28%;
}
.compare__table tbody td { color: var(--color-text-muted); }
.compare__table tr:last-child th,
.compare__table tr:last-child td { border-bottom: none; }

/* 用 thead 提高优先级，胜过 .compare__table thead th，无需 !important */
.compare__table thead .compare__highlight-col {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-deep) 100%);
  color: #fff;
}
/* 提高到 td.compare__win 级别，胜过 .compare__table tbody td 的 color */
.compare__table tbody td.compare__win {
  font-weight: 700;
  color: var(--color-cta-deep);
  background: var(--color-cta-soft);
}

/* =========================================================================
   S6 留资表单
   ========================================================================= */
.section--lead {
  position: relative;
  isolation: isolate;
  color: var(--color-text-invert);
  overflow: hidden;
  background: var(--color-primary-deep);
}
.section--lead::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(100% 120% at 90% 0%, rgba(56, 189, 248, .4) 0%, transparent 55%),
    linear-gradient(160deg, #0C4A6E 0%, #075985 60%, #0EA5E9 130%);
}
.lead__inner {
  display: grid;
  gap: var(--sp-12);
  align-items: center;
}
.lead__subtitle {
  margin-top: var(--sp-4);
  font-size: 16px;
  color: rgba(240, 249, 255, .9);
}
.lead__benefits {
  margin-top: var(--sp-8);
  display: grid;
  gap: var(--sp-3);
}
.lead__benefits li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(240, 249, 255, .95);
}
.lead__benefits .icon {
  width: 22px;
  height: 22px;
  color: #BBF7D0;
}

.lead__card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: clamp(var(--sp-6), 4vw, var(--sp-12));
  box-shadow: 0 24px 60px rgba(2, 30, 60, .35);
  color: var(--color-text);
}

.field { margin-bottom: var(--sp-6); }
/* 排除 .consent：避免过宽规则强制 latin/700/14，省去 .consent 内 !important */
.field > label:not(.consent),
.field legend {
  display: block;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: var(--sp-2);
  padding: 0;
}
.field > label span[aria-hidden],
.field legend span[aria-hidden] { color: var(--color-cta); }

fieldset.field {
  border: none;
  margin: 0 0 var(--sp-6);
  padding: 0;
  min-width: 0;
}

input[type="email"],
input[type="tel"],
input[type="text"]:not([tabindex="-1"]) {
  width: 100%;
  font-family: var(--font-zh);
  font-size: 16px; /* ≥16 防 iOS 聚焦缩放 */
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
input::placeholder { color: #94A3B8; }
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="text"]:not([tabindex="-1"]):focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

/* 做图量单选 */
.radio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}
.radio-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  transition: border-color var(--t-fast), background-color var(--t-fast), box-shadow var(--t-fast);
}
.radio-pill:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-soft);
}
.radio-pill input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  margin: 0;
}
.radio-pill:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: 0 0 0 1px var(--color-primary);
}
.radio-pill:has(input:focus-visible) {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* 同意勾选 */
.consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--font-zh);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 0;
}
.consent input {
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  accent-color: var(--color-primary);
  flex: none;
}
.consent a { font-weight: 700; }

/* 字段错误 */
.field-error {
  min-height: 0;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 500;
  color: #DC2626;
}
.field-error:empty { margin-top: 0; }

/* 表单状态 */
.form-status {
  margin-top: var(--sp-3);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}
.form-status:empty { margin: 0; }
.form-status[data-kind="pending"] { color: var(--color-primary); }
.form-status[data-kind="success"] { color: #16A34A; }
.form-status[data-kind="error"] { color: #DC2626; }

.form-note {
  margin-top: var(--sp-4);
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: center;
}

button[type="submit"].btn-cta { margin-top: var(--sp-2); }
button[type="submit"]:disabled {
  opacity: .65;
  cursor: not-allowed;
}

/* 成功面板 */
.success-panel {
  text-align: center;
  padding: var(--sp-8) var(--sp-4);
}
.success-panel__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  color: #16A34A;
  background: #DCFCE7;
  margin-bottom: var(--sp-4);
}
.success-panel__icon svg { width: 36px; height: 36px; }
.success-panel__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--sp-3);
}
.success-panel__desc {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 360px;
  margin-inline: auto;
}
/* 动态成功消息（aria-live 播报内容），略加强调 */
.success-msg {
  color: var(--color-text);
  font-weight: 700;
}
.success-msg:empty { display: none; }
.success-panel__hint {
  margin-top: var(--sp-3);
  font-size: 14px;
  color: var(--color-text-muted);
  max-width: 360px;
  margin-inline: auto;
}

/* =========================================================================
   浮动站点头
   ========================================================================= */
/* 头部常驻磨砂条：在 Hero 渐变与白色区块上都清晰可读（无需 JS 切换） */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 14px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 17px;
  color: var(--color-primary-deep);
}
.brand:hover { color: var(--color-primary); }
.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-deep) 100%);
  box-shadow: 0 4px 12px rgba(14, 165, 233, .35);
}
.brand__mark svg { width: 22px; height: 22px; }
.site-header__cta { font-size: 14px; }

/* =========================================================================
   S7 页脚
   ========================================================================= */
.site-footer {
  background: var(--color-primary-deep);
  color: rgba(240, 249, 255, .8);
  padding-block: var(--sp-16) var(--sp-8);
}
.site-footer__inner {
  display: grid;
  gap: var(--sp-8);
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.brand--footer { color: #fff; }
.site-footer__tagline {
  margin-top: var(--sp-3);
  font-size: 14px;
  color: rgba(240, 249, 255, .7);
  max-width: 320px;
}
.site-footer__heading {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--sp-3);
  font-family: var(--font-latin);
}
.site-footer__text {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(240, 249, 255, .72);
}
.site-footer a { color: #BAE6FD; }
.site-footer a:hover { color: #fff; }
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-6);
  justify-content: space-between;
  padding-top: var(--sp-6);
  font-size: 13px;
  color: rgba(240, 249, 255, .85);
}

/* =========================================================================
   滚动入场动效（渐进增强：仅当 <html class="js"> 时才初始隐藏；
   无 JS / JS 失败时内容默认可见，不依赖 IO）
   ========================================================================= */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  will-change: opacity, transform;
}
.js [data-reveal].in {
  opacity: 1;
  transform: none;
}

@keyframes heroPan {
  0% { background-position: 0% 0%, 0% 50%; }
  100% { background-position: 100% 100%, 100% 50%; }
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(187, 247, 208, .7); }
  70% { box-shadow: 0 0 0 10px rgba(187, 247, 208, 0); }
  100% { box-shadow: 0 0 0 0 rgba(187, 247, 208, 0); }
}

/* =========================================================================
   响应式（移动优先 -> 平板 -> PC）
   ========================================================================= */
@media (min-width: 600px) {
  .hero__demo {
    grid-template-columns: 1fr auto 1fr;
  }
  .ba-arrow {
    margin: 0;
    transform: none;
  }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .radio-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
  .container { padding-inline: var(--sp-8); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .site-header__inner { padding-block: 16px; }
}

@media (min-width: 960px) {
  .hero__inner {
    grid-template-columns: 1.05fr .95fr;
    gap: var(--sp-16);
  }
  .hero__demo {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
    position: relative;
  }
  /* PC 端 before/after 错位叠放，更有层次 */
  .hero__demo {
    grid-template-columns: 1fr;
  }
  .ba-card--before {
    width: 78%;
  }
  .ba-card--after {
    width: 82%;
    margin-left: auto;
    margin-top: -28px;
  }
  .ba-arrow {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) rotate(35deg);
    z-index: 3;
    background: #fff;
    color: var(--color-cta);
    border-color: #fff;
    box-shadow: var(--shadow-card);
  }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .lead__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-16);
  }
  .site-footer__inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: var(--sp-12);
  }
}

@media (min-width: 1024px) {
  .section { padding-block: 96px; }
  .hero { padding-block: 140px 96px; }
}

/* =========================================================================
   尊重 reduced-motion（硬性要求）
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  /* 关闭动画时确保入场元素可见 */
  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* =========================================================================
   顶部联系方式（电话高亮胶囊 + 邮箱）与页脚链接可读性
   ========================================================================= */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.site-header__contact {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.hcontact {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-deep);
  white-space: nowrap;
}
.hcontact:hover { color: var(--color-primary); }
.hcontact .icon { width: 16px; height: 16px; color: var(--color-primary); flex: none; }
.hcontact--tel {
  padding: 7px;
  border-radius: 999px;
  background: var(--color-primary-soft);
}
.hcontact--tel > span { display: none; }
.hcontact--mail { display: none; }

/* 深色页脚里的链接需更亮，hover 不消失 */
.site-footer a { color: var(--color-primary-light); }
.site-footer a:hover { color: #fff; }

@media (min-width: 768px) {
  .site-header__actions { gap: var(--sp-4); }
  .hcontact--tel { padding: 6px 12px; }
  .hcontact--tel > span { display: inline; }
  .hcontact--mail { display: inline-flex; }
}