:root {
    --green-950: #08281f;
    --green-900: #103f33;
    --green-800: #185444;
    --green-600: #3d8b6b;
    --green-100: #dff3e6;
    --green-50: #f2f8f4;
    --gold: #b88710;
    --ink: #173329;
    --muted: #61736b;
    --line: #cfe0d5;
    --paper: #fbfdfb;
    --white: #fff;
    --nav-height: 72px;
  }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
  }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.hero {
    min-height: 500px;
    display: grid;
    place-items: end start;
    padding: calc(var(--nav-height) + 72px) 6vw 80px;
    color: var(--white);
    background:
      linear-gradient(90deg, rgba(8,40,31,.96) 0%, rgba(8,40,31,.88) 48%, rgba(8,40,31,.35) 100%),
      url("/wp-content/themes/supersyn/assets/img/research-lab-desktop.jpg") center/cover no-repeat;
  }
.hero-inner { width: min(820px, 100%); }
.eyebrow { display: block; margin-bottom: 18px; color: #f0ce71; font-size: 13px; font-weight: 800; letter-spacing: .22em; }
h1 { margin: 0 0 20px; font-size: clamp(44px, 6vw, 82px); line-height: 1.08; letter-spacing: 0; }
.hero p { max-width: 700px; margin: 0; color: rgba(255,255,255,.82); font-size: 19px; }
.content { padding: 72px 6vw 96px; }
.content-inner { width: min(1180px, 100%); margin: 0 auto; }
.intro { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; margin-bottom: 42px; }
.section-label { color: var(--gold); font-size: 13px; font-weight: 800; letter-spacing: .2em; }
.intro h2 { margin: 14px 0 0; font-size: clamp(32px, 4vw, 52px); line-height: 1.2; letter-spacing: 0; }
.intro p { margin: 6px 0 0; color: var(--muted); font-size: 17px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
    min-height: 92px;
    padding: 22px 64px 22px 0;
    font-size: 21px;
    font-weight: 750;
    line-height: 1.45;
    cursor: pointer;
    list-style: none;
  }
summary::-webkit-details-marker { display: none; }
summary::after {
    content: "+";
    position: absolute;
    right: 8px;
    top: 50%;
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    color: var(--green-900);
    border: 1px solid var(--line);
    border-radius: 50%;
    transform: translateY(-50%);
  }
details[open] summary::after { content: "−"; background: var(--green-900); color: var(--white); border-color: var(--green-900); }
.number { min-width: 38px; color: var(--gold); font-family: Georgia, serif; font-size: 17px; }
.answer { max-width: 890px; padding: 0 64px 30px 56px; color: var(--muted); font-size: 17px; }
.answer p { margin: 0 0 12px; }
.answer a { color: var(--green-700, #28705a); font-weight: 700; border-bottom: 1px solid currentColor; }
.contact-band { padding: 64px 6vw; color: var(--white); background: var(--green-950); }
.contact-inner { width: min(1180px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1fr auto; gap: 48px; align-items: center; }
.contact-inner h2 { margin: 0 0 10px; font-size: clamp(30px, 4vw, 48px); line-height: 1.2; letter-spacing: 0; }
.contact-inner p { margin: 0; color: rgba(255,255,255,.72); }
.contact-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 11px 20px; border: 1px solid rgba(255,255,255,.8); border-radius: 4px; font-weight: 750; }
.button-primary { color: var(--green-950); background: var(--white); }
@media (max-width: 900px) {
:root { --nav-height: 64px; }
.hero { min-height: 450px; padding: calc(var(--nav-height) + 60px) 24px 56px; background-position: 62% center; }
h1 { font-size: clamp(40px, 12vw, 64px); }
.hero p { font-size: 16px; }
.content { padding: 56px 24px 72px; }
.intro { grid-template-columns: 1fr; gap: 18px; margin-bottom: 24px; }
.intro h2 { font-size: 34px; }
.contact-band { padding: 52px 24px; }
.contact-inner { grid-template-columns: 1fr; gap: 30px; }

}
@media (max-width: 620px) {
.hero { min-height: 420px; }
.eyebrow { font-size: 11px; }
summary { min-height: 82px; padding-right: 48px; font-size: 18px; }
summary::after { right: 0; width: 32px; height: 32px; }
.number { min-width: 30px; }
.answer { padding: 0 0 26px 48px; font-size: 15px; }
.contact-actions, .button { width: 100%; }

}

/* 导航统一成首页那一份，高度跟着改 */
:root { --nav-height: 68px; }
@media (max-width: 900px) { :root { --nav-height: 60px; } }