/* 应答官 Landing · 移动优先(380px 为基准),桌面为增强 */
:root {
  --ink: #1b2a33;
  --ink-2: #4a5a64;
  --ink-3: #7b8a93;
  --line: #dfe6ea;
  --bg: #ffffff;
  --bg-2: #f4f7f9;
  --brand: #0f5c6e;
  --brand-2: #0b4757;
  --brand-soft: #e6f1f4;
  --accent: #d98c2b;
  --radius: 12px;
  --wrap: 1040px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  word-break: break-word;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.3; margin: 0 0 .6em; font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
strong { font-weight: 700; }
em { font-style: normal; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
section { padding: 44px 0; }
.sec-title { font-size: 24px; text-align: center; margin-bottom: 24px; }

/* 按钮 */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.2;
  border: 2px solid var(--brand);
  cursor: pointer;
  text-align: center;
  max-width: 100%;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-2); border-color: var(--brand-2); text-decoration: none; }
.btn:disabled { opacity: .6; cursor: default; }

/* ① 顶栏 + Hero */
.site-head { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 10; }
.head-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 56px; padding-top: 8px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--ink); min-width: 0; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 32px; height: 32px; border-radius: 8px; flex: none; }
.brand-text { font-size: 13px; line-height: 1.3; font-weight: 700; }
.brand-en { font-weight: 400; color: var(--ink-3); }
.login-link { flex: none; font-size: 14px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2); }

.hero { background: linear-gradient(180deg, var(--brand-soft) 0%, #fff 100%); padding: 48px 0 40px; }
.hero h1 { font-size: 30px; letter-spacing: .01em; }
.hero-sub { font-size: 17px; color: var(--ink-2); }
.hero-hook { font-size: 15px; color: var(--ink-2); padding: 12px 14px; border-left: 4px solid var(--accent); background: #fff; border-radius: 6px; }
.hero-cta { margin: 20px 0 0; }

/* ② 痛点 */
.pains { background: var(--bg-2); }
.pain-list { display: grid; gap: 14px; }
.pain-list li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.pain-list h2 { font-size: 19px; margin-bottom: .4em; }
.pain-list p { margin: 0; color: var(--ink-2); }

/* ③ 三支柱 */
.pillar { padding: 22px 0; border-top: 1px solid var(--line); }
.pillar:first-child { border-top: 0; padding-top: 0; }
.pillar h2 { font-size: 21px; color: var(--brand); }
.pillar .dash { color: var(--ink-3); font-weight: 400; margin: 0 .1em; }
.trust { margin: 14px 0; padding: 14px 16px; background: var(--brand-soft); border-left: 4px solid var(--brand); border-radius: 6px; }
.trust p { margin: 0; font-weight: 700; }
.detail { color: var(--ink-3); font-size: 14px; margin: 0; }

/* ④ 运行方式 */
.flow { background: var(--bg-2); }
.timeline { display: grid; gap: 12px; }
.timeline li { position: relative; display: flex; gap: 12px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.timeline .step { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.timeline p { margin: 0; padding-top: 2px; }

/* ⑤ 企微 */
.wecom p { text-align: center; max-width: 720px; margin: 0 auto; font-size: 17px; color: var(--ink-2); }

/* ⑥ 定价 */
.pricing { background: var(--bg-2); }
.plans { display: grid; gap: 16px; }
.plan { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; }
.plan-pro { border-color: var(--brand); box-shadow: 0 0 0 1px var(--brand) inset; }
.plan h3 { font-size: 20px; margin-bottom: .2em; }
.price { font-size: 34px; font-weight: 700; color: var(--brand); margin: 0 0 12px; line-height: 1.2; }
.price .cur { font-size: 20px; margin-right: 2px; }
.price .per { font-size: 14px; font-weight: 400; color: var(--ink-3); margin-left: 6px; }
.feats li { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px solid var(--line); font-size: 15px; }
.feats .ok { flex: none; font-size: 14px; }
.feats .na { flex: none; width: 1.2em; text-align: center; color: var(--ink-3); }
.feats .no { color: var(--ink-3); }
.feats .tag { margin-left: auto; font-size: 12px; color: var(--brand); background: var(--brand-soft); padding: 2px 8px; border-radius: 999px; }
.feats .quota { justify-content: space-between; font-weight: 700; }
.feats .quota .lbl { font-weight: 400; color: var(--ink-2); }
.fine { text-align: center; color: var(--ink-3); font-size: 13px; margin: 18px 0 16px; }
.sec-cta { text-align: center; margin: 0; }

/* ⑦ FAQ */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-list dt { font-weight: 700; font-size: 17px; margin-top: 18px; padding-left: 1.6em; position: relative; }
.faq-list dt::before { content: "Q"; position: absolute; left: 0; top: .1em; color: var(--brand); font-weight: 700; }
.faq-list dd { margin: 6px 0 0 0; padding-left: 1.6em; color: var(--ink-2); }

/* ⑧ 留资 */
.lead { background: var(--brand); color: #fff; }
.lead .sec-title { color: #fff; font-size: 22px; }
.lead-form { max-width: 440px; margin: 0 auto; background: #fff; color: var(--ink); border-radius: var(--radius); padding: 22px 20px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 6px; }
.field input, .field select {
  width: 100%; font: inherit; font-size: 16px; padding: 11px 12px;
  border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink);
  -webkit-appearance: none; appearance: none;
}
.field select { background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 32px; }
.field input:focus, .field select:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: var(--brand); }
.field.invalid input, .field.invalid select { border-color: #c0392b; }
.hp { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.form-msg { min-height: 1.2em; font-size: 14px; color: #c0392b; margin: 0 0 8px; }
.form-actions { margin: 0 0 10px; }
.form-actions .btn { width: 100%; }
.form-note { font-size: 12px; color: var(--ink-3); text-align: center; margin: 0; }
.lead-done { max-width: 440px; margin: 0 auto; background: #fff; color: var(--ink); border-radius: var(--radius); padding: 26px 20px; text-align: center; font-weight: 700; }

/* ⑨ Footer(深色,居中规整版式;各宽度自适应,无需断点) */
.site-foot { background: #14283a; color: #9fb0bd; border-top: 1px solid rgba(255,255,255,.09); padding: 40px 0; font-size: 13px; }
.foot-inner { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 14px; }
.foot-brand { display: inline-flex; align-items: center; gap: 8px; color: #e6edf2; font-weight: 700; font-size: 15px; }
.foot-brand:hover { text-decoration: none; color: #fff; }
.foot-mark { width: 26px; height: 26px; border-radius: 6px; }
.foot-brand-en { color: #8a99a6; font-weight: 400; }
.foot-links { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.foot-links a { color: #9fb0bd; line-height: 1.1; }
.foot-links a:hover { color: #fff; }
.foot-copy { margin: 0; color: #7c8c99; font-size: 12px; }
[hidden] { display: none !important; }

/* 桌面增强 */
@media (min-width: 720px) {
  section { padding: 64px 0; }
  .sec-title { font-size: 30px; margin-bottom: 32px; }
  .brand-text { font-size: 16px; white-space: nowrap; }
  .head-bar { padding-top: 0; padding-bottom: 0; height: 56px; }
  .hero { padding: 80px 0 64px; text-align: center; }
  .hero h1 { font-size: 44px; }
  .hero-sub { font-size: 19px; max-width: 760px; margin: 0 auto 1em; }
  .hero-hook { display: inline-block; text-align: left; max-width: 760px; }
  .pain-list { grid-template-columns: repeat(3, 1fr); }
  .pillars .wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
  .pillar { border-top: 0; border-left: 1px solid var(--line); padding: 0 0 0 24px; }
  .pillar:first-child { border-left: 0; padding-left: 0; }
  .timeline { grid-template-columns: repeat(4, 1fr); }
  .timeline li { flex-direction: column; }
  .plans { grid-template-columns: repeat(2, 1fr); max-width: 760px; margin: 0 auto; }
  .foot-links { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 0; }
  .foot-links a { padding: 0 14px; }
  .foot-links a + a { border-left: 1px solid rgba(255,255,255,.16); }
}