/* ===== 基础变量 ===== */
:root {
  --green: #1f7a4d;
  --green-deep: #145c39;
  --green-light: #e8f5ec;
  --amber: #e8a33d;
  --blue: #2f7fd1;
  --ink: #16241c;
  --ink-soft: #4a5a50;
  --bg: #f7faf7;
  --tint: #eef6f0;
  --white: #ffffff;
  --shadow: 0 18px 40px rgba(20, 60, 40, .10);
  --shadow-sm: 0 8px 22px rgba(20, 60, 40, .08);
  --radius: 18px;
  --maxw: 1160px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ===== 顶部条 ===== */
.topbar { background: var(--green-deep); color: #dff3e7; font-size: 13px; }
.topbar__inner { display: flex; justify-content: space-between; padding: 8px 22px; flex-wrap: wrap; gap: 6px; }
.topbar__contact { color: #ffe6bd; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid rgba(20,60,40,.06);
  transition: box-shadow .3s, background .3s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--green); }
.brand__logo { display: grid; place-items: center; width: 40px; height: 40px; background: var(--green-light); border-radius: 11px; }
.brand__text strong { display: block; font-size: 18px; color: var(--ink); letter-spacing: .5px; }
.brand__text em { font-style: normal; font-size: 11px; color: var(--ink-soft); letter-spacing: 1px; }
.nav__menu { display: flex; align-items: center; gap: 28px; }
.nav__menu a { font-size: 15px; color: var(--ink-soft); font-weight: 500; transition: color .2s; position: relative; }
.nav__menu a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; background: var(--green); transition: width .25s;
}
.nav__menu a:not(.nav__cta):hover { color: var(--green); }
.nav__menu a:not(.nav__cta):hover::after { width: 100%; }
.nav__cta {
  background: var(--green); color: #fff !important; padding: 9px 18px; border-radius: 999px; font-weight: 600;
  transition: transform .2s, background .2s;
}
.nav__cta:hover { background: var(--green-deep); transform: translateY(-1px); }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav__toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1.5px solid transparent; transition: transform .2s, box-shadow .2s, background .2s;
}
.btn--primary { background: var(--green); color: #fff; box-shadow: 0 10px 24px rgba(31,122,77,.32); }
.btn--primary:hover { background: var(--green-deep); transform: translateY(-2px); }
.btn--ghost { background: transparent; color: var(--green); border-color: rgba(31,122,77,.4); }
.btn--ghost:hover { background: var(--green-light); transform: translateY(-2px); }
.btn--block { width: 100%; }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; padding: 64px 0 88px; }
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 460px at 82% 12%, rgba(232,163,61,.16), transparent 60%),
    radial-gradient(820px 520px at 8% 90%, rgba(47,127,209,.12), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, var(--green-light) 100%);
}
.hero__inner {
  position: relative; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 40px;
}
.hero__tag {
  display: inline-block; background: rgba(31,122,77,.1); color: var(--green-deep);
  padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; letter-spacing: .5px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(36px, 6vw, 62px); line-height: 1.08; letter-spacing: 1px; color: var(--ink); }
.gradient-text {
  background: linear-gradient(100deg, var(--green) 0%, var(--amber) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead { margin: 20px 0 28px; font-size: 17px; color: var(--ink-soft); max-width: 540px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__stats { display: flex; gap: 34px; margin-top: 42px; flex-wrap: wrap; }
.hero__stats strong { display: block; font-size: 34px; color: var(--green-deep); font-weight: 800; }
.hero__stats span { font-size: 13.5px; color: var(--ink-soft); }

.hero__visual { position: relative; min-height: 320px; display: grid; place-items: center; }
.orb { position: absolute; border-radius: 50%; filter: blur(8px); opacity: .55; }
.orb--1 { width: 230px; height: 230px; background: radial-gradient(circle at 30% 30%, #6fd29a, transparent 70%); top: 6%; left: 12%; }
.orb--2 { width: 180px; height: 180px; background: radial-gradient(circle at 30% 30%, #ffd79a, transparent 70%); bottom: 4%; right: 8%; }
.hero__card {
  position: relative; background: rgba(255,255,255,.9); border: 1px solid rgba(20,60,40,.08);
  border-radius: 20px; padding: 26px 28px; width: 280px; box-shadow: var(--shadow); backdrop-filter: blur(6px);
}
.hero__card-row { display: flex; align-items: center; justify-content: space-between; padding: 9px 0; font-weight: 600; color: var(--ink); border-bottom: 1px dashed rgba(20,60,40,.1); }
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot--green { background: var(--green); } .dot--amber { background: var(--amber); } .dot--blue { background: var(--blue); }
.hero__card-bar { height: 9px; background: rgba(20,60,40,.08); border-radius: 999px; margin: 18px 0 8px; overflow: hidden; }
.hero__card-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--green), var(--amber)); border-radius: 999px; }
.hero__card p { font-size: 13px; color: var(--ink-soft); }

/* ===== 通用区块 ===== */
.section { padding: 84px 0; }
.section--tint { background: var(--tint); }
.section__head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.eyebrow { display: inline-block; color: var(--green); font-weight: 700; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; margin-bottom: 12px; }
.section__head h2 { font-size: clamp(26px, 3.4vw, 38px); color: var(--ink); line-height: 1.25; }
.section__head p { margin-top: 14px; color: var(--ink-soft); font-size: 16px; }

/* ===== 关于我们 ===== */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.about__text h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 18px; line-height: 1.3; }
.about__text p { color: var(--ink-soft); font-size: 16px; margin-bottom: 14px; }
.about__text strong { color: var(--green-deep); }
.about__list { list-style: none; margin-top: 22px; display: grid; gap: 12px; }
.about__list li { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--ink); }
.about__list svg { color: var(--green); flex: none; }
.about__cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.stat-card { background: #fff; border: 1px solid rgba(20,60,40,.07); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }
.stat-card--accent { background: linear-gradient(150deg, var(--green) 0%, var(--green-deep) 100%); color: #fff; border: none; }
.stat-card h3 { font-size: 17px; margin-bottom: 10px; }
.stat-card p { font-size: 14.5px; opacity: .92; }

/* ===== 核心业务 ===== */
.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.biz-card { background: #fff; border: 1px solid rgba(20,60,40,.07); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s; }
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.biz-card__icon { width: 56px; height: 56px; border-radius: 14px; background: var(--green-light); color: var(--green); display: grid; place-items: center; margin-bottom: 18px; }
.biz-card h3 { font-size: 18px; margin-bottom: 10px; }
.biz-card p { color: var(--ink-soft); font-size: 14.5px; }
.biz-card ul { list-style: none; margin-top: 14px; display: grid; gap: 7px; }
.biz-card ul li { position: relative; padding-left: 18px; font-size: 13.5px; color: var(--ink-soft); }
.biz-card ul li::before { content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--amber); }

/* ===== 行业方案 ===== */
.sol-tabs { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 34px; }
.sol-tab { padding: 11px 24px; border-radius: 999px; background: #fff; border: 1.5px solid rgba(20,60,40,.12); color: var(--ink-soft); font-weight: 600; cursor: pointer; transition: .25s; }
.sol-tab:hover { border-color: var(--green); color: var(--green); }
.sol-tab.is-active { background: var(--green); color: #fff; border-color: var(--green); }
.sol-panels { position: relative; }
.sol-panel { display: none; grid-template-columns: 280px 1fr; gap: 32px; align-items: center; background: #fff; border: 1px solid rgba(20,60,40,.07); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow-sm); }
.sol-panel.is-active { display: grid; animation: fade .4s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(10px);} to { opacity: 1; transform: none; } }
.sol-panel__media { background: linear-gradient(150deg, var(--green-light), #fff); border-radius: 16px; height: 200px; display: grid; place-items: center; }
.sol-emoji { font-size: 76px; }
.sol-panel__body h3 { font-size: 22px; margin-bottom: 12px; }
.sol-panel__body p { color: var(--ink-soft); font-size: 15.5px; margin-bottom: 18px; }
.sol-chips { display: flex; gap: 10px; flex-wrap: wrap; }
.sol-chips span { background: var(--green-light); color: var(--green-deep); padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; }

/* ===== 服务流程 ===== */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.step { background: #fff; border-radius: var(--radius); padding: 26px 20px; border: 1px solid rgba(20,60,40,.07); box-shadow: var(--shadow-sm); position: relative; }
.step__no { font-size: 30px; font-weight: 800; color: var(--green-light); -webkit-text-stroke: 1.2px var(--green); display: block; margin-bottom: 10px; }
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--ink-soft); }

/* ===== 优势 ===== */
.why__head { text-align: center; margin-bottom: 48px; }
.why__head h2 { font-size: clamp(26px, 3.4vw, 36px); }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.why-item { background: #fff; border-radius: var(--radius); padding: 28px 24px; border-top: 4px solid var(--green); box-shadow: var(--shadow-sm); transition: transform .25s; }
.why-item:hover { transform: translateY(-5px); }
.why-item h3 { font-size: 18px; margin-bottom: 10px; color: var(--green-deep); }
.why-item p { font-size: 14.5px; color: var(--ink-soft); }

/* ===== 案例 ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card { background: #fff; border-radius: var(--radius); padding: 28px; border: 1px solid rgba(20,60,40,.07); box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s; }
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-card__tag { display: inline-block; background: var(--green-light); color: var(--green-deep); font-size: 12.5px; font-weight: 700; padding: 5px 13px; border-radius: 999px; margin-bottom: 16px; }
.case-card h3 { font-size: 18px; margin-bottom: 10px; }
.case-card p { font-size: 14.5px; color: var(--ink-soft); }

/* ===== 联系 ===== */
.contact__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact__info h2 { font-size: clamp(24px, 3vw, 34px); margin: 8px 0 14px; }
.contact__info p { color: var(--ink-soft); margin-bottom: 24px; }
.contact__list { list-style: none; display: grid; gap: 14px; }
.contact__list li { font-weight: 600; color: var(--ink); }
.contact__list span { display: inline-block; width: 56px; color: var(--green); font-weight: 700; }
.contact__form { background: #fff; border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); border: 1px solid rgba(20,60,40,.07); }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; color: var(--ink); }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid rgba(20,60,40,.15); border-radius: 12px;
  font-family: inherit; font-size: 15px; color: var(--ink); background: #fcfdfc; transition: border .2s, box-shadow .2s; resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(31,122,77,.14); }
.form__hint { font-size: 13px; color: var(--green); margin-top: 12px; text-align: center; min-height: 18px; }

/* ===== 页脚 ===== */
.footer { background: var(--green-deep); color: #cfead9; }
.footer__inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; padding: 52px 22px 34px; }
.footer__brand strong { font-size: 17px; color: #fff; }
.footer__brand p { margin-top: 10px; font-size: 13.5px; color: #a9d4bb; max-width: 320px; }
.footer__col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer__col a { display: block; font-size: 14px; color: #b7dcc6; padding: 5px 0; transition: color .2s; }
.footer__col a:hover { color: #fff; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 16px 0; font-size: 13px; color: #9cc9af; text-align: center; }

/* ===== 滚动揭示动画 ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { min-height: 260px; }
  .about { grid-template-columns: 1fr; gap: 32px; }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: 1fr; }
  .contact__inner { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav__menu {
    position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; gap: 0;
    padding: 10px 0; border-bottom: 1px solid rgba(20,60,40,.08); box-shadow: var(--shadow-sm);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .25s;
  }
  .nav__menu.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__menu a { padding: 13px 22px; width: 100%; }
  .nav__toggle { display: flex; }
  .biz-grid, .why-grid, .steps { grid-template-columns: 1fr; }
  .about__cards { grid-template-columns: 1fr; }
  .sol-panel { grid-template-columns: 1fr; }
  .hero__stats { gap: 22px; }
  .footer__inner { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}