/* ==========================================================================
   SUNRISE PREFAB — site stylesheet
   结构参考 OKPREFAB，视觉可换肤：改 --accent / --nav-bg 即可
   ========================================================================== */

:root {
  --ink: #0e1114;
  --ink-2: #1a2026;
  --text: #2b3238;
  --muted: #6f7a84;
  --line: #e3e7ea;
  --accent: #2aa6c9;
  --accent-d: #1c88a6;
  --bg: #ffffff;
  --soft: #f5f7f8;
  --nav-h: 84px;
  --wrap: 1240px;
  --r: 6px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  font-size: 15px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; color: var(--ink); font-weight: 700; letter-spacing: -0.01em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 60;
  display: flex; align-items: center;
  background: rgba(12, 16, 20, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.nav .wrap { display: flex; align-items: center; gap: 34px; width: 100%; }

.logo { display: flex; align-items: baseline; gap: 8px; color: #fff; font-weight: 800; font-size: 21px; letter-spacing: 0.06em; }
.logo span { color: var(--accent); }
.logo small { font-size: 10px; letter-spacing: 0.22em; color: #8f9aa3; font-weight: 500; }

.menu { display: flex; gap: 28px; margin-left: 14px; }
.menu a {
  color: #e8edf1; font-size: 13.5px; letter-spacing: 0.04em; padding: 6px 0;
  border-bottom: 2px solid transparent; transition: color .18s, border-color .18s;
}
.menu a:hover, .menu a.on { color: #fff; border-color: var(--accent); }

.nav-right { margin-left: auto; display: flex; align-items: center; gap: 18px; }
.lang { color: #b9c3ca; font-size: 13px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 42px; padding: 0 20px; border-radius: 4px; border: 0;
  background: var(--accent); color: #fff; font-size: 13.5px; font-weight: 600;
  letter-spacing: 0.02em; cursor: pointer; transition: background .18s, transform .18s;
}
.btn:hover { background: var(--accent-d); }
.btn.ghost { background: transparent; border: 1px solid rgba(255,255,255,.45); }
.btn.ghost:hover { background: rgba(255,255,255,.1); }
.btn.dark { background: var(--ink); }
.btn.dark:hover { background: #000; }

.burger { display: none; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.25); background: none; border-radius: 4px; }
.burger i { display: block; width: 18px; height: 2px; background: #fff; margin: 4px auto; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 640px; padding-top: var(--nav-h);
  display: flex; align-items: center;
  background: #10161b url("../images/hero-dusk.png") center/cover no-repeat;
}
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(9,13,17,.82) 0%, rgba(9,13,17,.55) 46%, rgba(9,13,17,.18) 100%); }
.hero .wrap { position: relative; z-index: 2; padding-top: 40px; padding-bottom: 60px; }
.hero .kicker { color: var(--accent); font-size: 12px; letter-spacing: 0.26em; text-transform: uppercase; margin-bottom: 18px; }
.hero h1 { color: #fff; font-size: clamp(34px, 4.4vw, 60px); line-height: 1.12; max-width: 720px; }
.hero p { color: #d3dbe1; max-width: 560px; margin: 22px 0 34px; font-size: 16px; line-height: 1.75; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-stats { display: flex; gap: 46px; margin-top: 54px; flex-wrap: wrap; }
.hero-stats div strong { display: block; color: #fff; font-size: 26px; font-weight: 700; }
.hero-stats div span { color: #9fb0bb; font-size: 12.5px; letter-spacing: 0.04em; }

/* ---------- 通用段落 ---------- */
.section { padding: 86px 0; }
.section.soft { background: var(--soft); }
.sec-head { max-width: 720px; margin-bottom: 44px; }
.sec-head .tag { color: var(--accent); font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase; font-weight: 600; }
.sec-head h2 { font-size: clamp(26px, 2.6vw, 36px); margin: 12px 0 14px; }
.sec-head p { color: var(--muted); margin: 0; }

/* ---------- 产品网格 ---------- */
.grid { display: grid; gap: 26px; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  overflow: hidden; transition: box-shadow .2s, transform .2s, border-color .2s;
}
.card:hover { box-shadow: 0 14px 34px rgba(15, 25, 35, .1); transform: translateY(-2px); border-color: #cfd6db; }
.card .thumb { aspect-ratio: 4 / 3; background: #eef1f3 center/cover no-repeat; }
.card .thumb.wide { aspect-ratio: 16 / 9; }
.card .body { padding: 20px 22px 24px; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { margin: 0; color: var(--muted); font-size: 13.6px; }
.card .meta { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-size: 11.5px; color: #56636d; background: var(--soft);
  border: 1px solid var(--line); border-radius: 100px; padding: 3px 10px;
}

/* ---------- 应用场景 ---------- */
.app {
  position: relative; border-radius: var(--r); overflow: hidden; min-height: 260px;
  display: flex; align-items: flex-end; color: #fff;
  background: #1b232a center/cover no-repeat;
}
.app::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,12,16,.05) 30%, rgba(8,12,16,.86) 100%); }
.app .txt { position: relative; z-index: 2; padding: 24px; }
.app h3 { color: #fff; font-size: 18px; }
.app p { margin: 6px 0 0; color: #c8d4dc; font-size: 13px; }

/* ---------- 优势 ---------- */
.why { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.why .item { border-top: 2px solid var(--ink); padding-top: 20px; }
.why .num { color: var(--accent); font-size: 12px; letter-spacing: 0.2em; font-weight: 700; }
.why h3 { font-size: 16px; margin: 10px 0 8px; }
.why p { margin: 0; color: var(--muted); font-size: 13.4px; }

/* ---------- CTA 条 ---------- */
.cta {
  background: var(--ink); color: #fff; padding: 64px 0;
}
.cta .wrap { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta h2 { color: #fff; font-size: clamp(22px, 2.4vw, 32px); }
.cta p { color: #a9b6c0; margin: 10px 0 0; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 40px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; color: #4d5a64; letter-spacing: .02em; }
.field label b { color: #d9534f; font-weight: 400; }
.field input, .field select, .field textarea {
  border: 0; border-bottom: 1px solid #c9d1d7; background: transparent;
  padding: 9px 2px; font-size: 15px; color: var(--text); font-family: inherit; outline: none;
  transition: border-color .18s;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 90px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 12.6px; color: var(--muted); }
.check input { margin-top: 3px; }

/* ---------- 选配器 ---------- */
.cfg { padding-top: calc(var(--nav-h) + 30px); background: var(--soft); min-height: 100vh; }
.cfg-box { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 34px 38px 28px; }
.cfg-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 6px; }
.cfg-top h1 { font-size: 24px; }
.cfg-top .hint { color: var(--muted); font-size: 12.8px; }
.bar { height: 3px; background: #e6ebee; border-radius: 3px; margin: 18px 0 26px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s; }

.pills { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 26px; }
.pill { font-size: 12px; color: #6b7883; padding: 5px 11px; border-radius: 100px; background: var(--soft); border: 1px solid var(--line); }
.pill.done { background: #eaf6fa; border-color: #bfe2ee; color: var(--accent-d); }
.pill.now { background: var(--accent); border-color: var(--accent); color: #fff; }

.q { font-size: 21px; margin-bottom: 6px; }
.qsub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }

.opts { display: grid; gap: 12px; }
.opts.c2 { grid-template-columns: repeat(2, 1fr); }
.opts.c3 { grid-template-columns: repeat(3, 1fr); }
.opts.c4 { grid-template-columns: repeat(4, 1fr); }

.opt {
  display: flex; gap: 12px; align-items: center; padding: 13px 15px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 7px; background: #fff;
  font-size: 13.6px; transition: border-color .15s, box-shadow .15s, background .15s;
}
.opt:hover { border-color: #b9c6ce; box-shadow: 0 4px 14px rgba(16, 26, 36, .06); }
.opt input { accent-color: var(--accent); }
.opt.sel { border-color: var(--accent); background: #f4fbfd; box-shadow: 0 0 0 1px var(--accent) inset; }
.opt .sw { width: 42px; height: 42px; border-radius: 5px; border: 1px solid rgba(0,0,0,.08); flex: none; }
.opt .nm { line-height: 1.35; }
.opt .nm small { display: block; color: var(--muted); font-size: 11.5px; }

.cfg-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--line); }
.cfg-foot .tip { color: var(--muted); font-size: 12.5px; }
.cfg-foot .right { display: flex; gap: 12px; }

.summary { list-style: none; padding: 0; margin: 0; }
.summary li { display: flex; justify-content: space-between; gap: 20px; padding: 12px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.summary li span:first-child { color: var(--muted); }
.summary li span:last-child { font-weight: 600; color: var(--ink); text-align: right; }

/* ---------- 页脚 ---------- */
.foot { background: #0b0f13; color: #93a0aa; padding: 58px 0 26px; font-size: 13.2px; }
.foot .cols { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.foot h4 { color: #fff; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 14px; }
.foot a { color: #93a0aa; display: block; padding: 4px 0; }
.foot a:hover { color: #fff; }
.foot .logo { margin-bottom: 14px; }
.foot .bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 40px; padding-top: 18px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12.2px; color: #6c7882; }

/* ---------- 提示条 ---------- */
.demo-note {
  background: #fff8e8; border-bottom: 1px solid #f0dfb8; color: #7a6320;
  font-size: 12.5px; padding: 8px 0;
}
.demo-note .wrap { display: flex; gap: 10px; align-items: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid.c3, .grid.c4 { grid-template-columns: repeat(2, 1fr); }
  .why { grid-template-columns: repeat(2, 1fr); }
  .foot .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .menu, .nav-right .lang { display: none; }
  .burger { display: block; margin-left: auto; }
  .nav-right { margin-left: auto; }
  .menu.open {
    display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: #0c1014; padding: 10px 28px 20px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .menu.open a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.07); }
  .hero { min-height: 560px; }
  .form-grid { grid-template-columns: 1fr; }
  .opts.c3, .opts.c4 { grid-template-columns: repeat(2, 1fr); }
  .cfg-box { padding: 24px 18px; }
}
@media (max-width: 620px) {
  .grid.c3, .grid.c4, .grid.c2, .opts.c2 { grid-template-columns: 1fr; }
  .why { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero-stats { gap: 26px; }
  .foot .cols { grid-template-columns: 1fr; }
  .cfg-top h1 { font-size: 20px; }
  .q { font-size: 18px; }
}