/* NimbleClean site · RC11 品牌:薄荷页底、白卡 28px、品牌绿渐变主按钮、四类色小图标块、双下划线签名。
   零第三方请求:系统字体栈 + 同源自托管的 Archivo Narrow SemiBold(与 App 同一字体,仅用于标题 / 字标)。 */
@font-face {
  font-family: "NC Narrow";
  src: url("fonts/archivo-narrow-semibold.ttf") format("truetype");
  font-weight: 600; font-style: normal; font-display: swap;
}
:root {
  color-scheme: light dark;
  --top: #f3f9f5; --bottom: #e2efe7;
  --card: #ffffff; --sunken: #eef5f0;
  --ink: #14231c; --pencil: #4f5f57; --hair: #d9e5de;
  --brand: #0f8a5f; --brand-deep: #0b7a55; --b1: #0e8660; --b2: #0a7050; --on-btn: #ffffff;
  --shadow: 0 8px 24px -8px rgba(15, 60, 40, .16);
  --btn-shadow: 0 10px 22px -8px rgba(15, 138, 95, .55);
  --note: #ddf3e8; --note-ink: #0b5a3d;
  --red-ink: #b3321f;
  --video-a: #6b8dee; --video-b: #4a71dd; --video-g: #ffffff;
  --shot-a: #e8a94a;  --shot-b: #da922b;  --shot-g: #3b2600;
  --chat-a: #e26e5a;  --chat-b: #db5c48;  --chat-g: #ffffff;
  --cache-a: #9b7be6; --cache-b: #8460d6; --cache-g: #ffffff;
  --grad-a: #0e8660; --grad-b: #095f43;
  --focus: #0b5a3d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --top: #0a1210; --bottom: #0e1a15;
    --card: #15211b; --sunken: #0f1914;
    --ink: #e6efe9; --pencil: #a1b1a9; --hair: #22332a;
    --brand: #3fd39a; --brand-deep: #3fd39a; --b1: #4bdda4; --b2: #2ebf88; --on-btn: #06281b;
    --shadow: 0 0 0 1px rgba(255, 255, 255, .04) inset;
    --btn-shadow: none;
    --note: #173226; --note-ink: #a8e6c8;
    --red-ink: #f0a090;
    --video-a: #a3b8f6; --video-b: #86a0f2; --video-g: #0a1210;
    --shot-a: #f7d283; --shot-b: #f2c25e; --shot-g: #0a1210;
    --chat-a: #f8ab9c; --chat-b: #f59482; --chat-g: #0a1210;
    --cache-a: #cdb6f6; --cache-b: #ba9bf2; --cache-g: #0a1210;
    --grad-a: #4bdda4; --grad-b: #2ebf88;
    --focus: #a8e6c8;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
body {
  margin: 0; color: var(--ink); min-height: 100vh;
  background: var(--bottom) linear-gradient(180deg, var(--top) 0, var(--bottom) 100%) no-repeat;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  display: flex; flex-direction: column;
}
img, svg { max-width: 100%; }
a { color: var(--brand-deep); overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--card); color: var(--ink); padding: 10px 14px; border-radius: 12px; z-index: 10; box-shadow: var(--shadow); }
.skip:focus { top: 12px; }
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.narrow, h1, h2, h3.narrow { font-family: "NC Narrow", "Arial Narrow", "Roboto Condensed", "Avenir Next Condensed", system-ui, sans-serif; font-weight: 600; letter-spacing: .005em; }

.top { padding: 14px 0; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 1.7rem; line-height: 1; min-height: 44px; }
.brand img { width: 40px; height: 40px; border-radius: 11px; display: block; }
.nav { display: flex; gap: 6px; }
.nav a { color: var(--ink); text-decoration: none; padding: 10px 14px; border-radius: 14px; min-height: 44px; display: inline-flex; align-items: center; }
.nav a:hover { background: var(--card); }
.nav a[aria-current="page"] { background: var(--card); box-shadow: var(--shadow); color: var(--brand-deep); }

/* 签名双下划线 */
.sig::after { content: ""; display: block; width: 48px; height: 10px; margin-top: 12px; border-top: 3px solid var(--brand); border-bottom: 3px solid var(--brand); }

h1, h2, h3 { line-height: 1.15; margin: 0; }
.grad { background: linear-gradient(100deg, var(--grad-a), var(--grad-b)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.hero { padding: 28px 0 40px; }
.hero .wrap { display: grid; gap: 28px; align-items: center; }
.hero h1 { font-size: clamp(2.5rem, 9vw, 4.2rem); }
.lede { font-size: 1.12rem; color: var(--pencil); max-width: 34em; margin: 22px 0 0; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; min-height: 56px; padding: 0 26px; border-radius: 20px; text-decoration: none; font-weight: 700; font-size: 1.05rem;
  color: var(--on-btn); background: linear-gradient(180deg, var(--b1), var(--b2)); box-shadow: var(--btn-shadow);
}
.btn:hover { filter: brightness(1.06); }
.btn.ghost { background: var(--card); color: var(--brand-deep); box-shadow: var(--shadow); border: 1px solid var(--hair); }
.fine { color: var(--pencil); font-size: .92rem; margin: 14px 0 0; }
.hero figure { margin: 0; justify-self: center; }
.shot { display: block; width: 100%; height: auto; border-radius: 26px; box-shadow: var(--shadow); background: var(--b2); }
.hero .shot { max-width: 300px; margin: 0 auto; }

section { padding: 28px 0; }
section > .wrap > h2 { font-size: clamp(1.9rem, 6vw, 2.6rem); }
.intro { color: var(--pencil); max-width: 40em; margin: 14px 0 0; }
.cards { display: grid; gap: 16px; margin-top: 28px; grid-template-columns: 1fr; }
.card { background: var(--card); border-radius: 28px; padding: 22px; box-shadow: var(--shadow); border: 1px solid var(--hair); }
.card h3 { font-size: 1.5rem; margin: 14px 0 8px; }
.card p { margin: 0; color: var(--pencil); }
.card p + p { margin-top: 8px; }
.blk { flex: none; width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #fff; background: linear-gradient(160deg, var(--b1), var(--b2)); }
.blk svg { width: 28px; height: 28px; }
@media (prefers-color-scheme: dark) { .blk { color: #06281b; } }
.blk.video { background: linear-gradient(160deg, var(--video-a), var(--video-b)); color: var(--video-g); }
.blk.shot2 { background: linear-gradient(160deg, var(--shot-a), var(--shot-b)); color: var(--shot-g); }
.blk.chat { background: linear-gradient(160deg, var(--chat-a), var(--chat-b)); color: var(--chat-g); }
.blk.cache { background: linear-gradient(160deg, var(--cache-a), var(--cache-b)); color: var(--cache-g); }

.groups { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 12px; grid-template-columns: 1fr; }
.groups li { display: flex; gap: 14px; align-items: center; background: var(--card); border-radius: 24px; padding: 16px; box-shadow: var(--shadow); border: 1px solid var(--hair); }
.groups .t { font-weight: 700; display: block; }
.groups .d { color: var(--pencil); font-size: .95rem; }
.groups .dashed { border-style: dashed; }

.gallery { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.gallery figure { margin: 0; }
.gallery figcaption { color: var(--pencil); font-size: .92rem; margin-top: 8px; text-align: center; }

.note { background: var(--note); color: var(--note-ink); border-radius: 24px; padding: 18px 20px; margin-top: 28px; }
.danger { color: var(--red-ink); }

footer.site { margin-top: auto; padding: 36px 0 44px; border-top: 1px solid var(--hair); background: var(--card); }
footer.site .wrap { display: grid; gap: 14px; }
footer.site .links { display: flex; flex-wrap: wrap; gap: 6px 20px; }
footer.site .links a { display: inline-flex; min-height: 44px; align-items: center; }
footer.site small { color: var(--pencil); display: block; line-height: 1.5; }

.doc-wrap { max-width: 760px; margin: 0 auto; padding: 8px 20px 56px; width: 100%; }
article.doc { background: var(--card); border: 1px solid var(--hair); border-radius: 28px; padding: 28px 22px; box-shadow: var(--shadow); }
article.doc h1 { font-size: clamp(1.9rem, 6vw, 2.5rem); margin: 0 0 8px; }
article.doc h1::after { content: ""; display: block; width: 48px; height: 10px; margin-top: 12px; border-top: 3px solid var(--brand); border-bottom: 3px solid var(--brand); }
article.doc h2 { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; font-size: 1.15rem; margin: 30px 0 6px; line-height: 1.3; }
article.doc p { margin: 8px 0; }
article.doc ul { margin: 8px 0; padding-left: 1.25rem; }
article.doc li { margin: 6px 0; }
article.doc .meta { color: var(--pencil); font-size: .95rem; }
article.doc .summary { background: var(--note); color: var(--note-ink); border-radius: 20px; padding: 14px 18px; margin: 20px 0 0; }
article.doc .summary h2 { margin: 0 0 4px; }
article.doc code { font: .88em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--sunken); padding: 1px 6px; border-radius: 6px; overflow-wrap: anywhere; }
article.doc footer { color: var(--pencil); font-size: .9rem; margin-top: 26px; }
.page-h { padding: 18px 0 4px; }
.page-h h1 { font-size: clamp(2.1rem, 7.5vw, 3.2rem); }

.faq { margin-top: 24px; display: grid; gap: 12px; }
.faq details { background: var(--card); border: 1px solid var(--hair); border-radius: 24px; box-shadow: var(--shadow); }
.faq summary { cursor: pointer; padding: 16px 20px; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 14px; align-items: center; min-height: 56px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; flex: none; width: 10px; height: 10px; border-right: 3px solid var(--brand); border-bottom: 3px solid var(--brand); transform: rotate(45deg); transition: transform .15s; margin-right: 4px; }
.faq details[open] summary::after { transform: rotate(-135deg); }
.faq .a { padding: 0 20px 18px; }
.faq .a p { margin: 8px 0; }
.faq .a ul { margin: 8px 0; padding-left: 1.2rem; }
.faq .a li { margin: 4px 0; }
.contact { margin-top: 28px; }
.contact .mail { font-size: 1.15rem; font-weight: 700; }
.contact ul { padding-left: 1.2rem; }

.nf { text-align: center; padding: 56px 0; }
.nf .big { font-size: clamp(4rem, 22vw, 8rem); line-height: 1; }
.nf .sig::after { margin-left: auto; margin-right: auto; }
.nf .cta { justify-content: center; }

@media (min-width: 640px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .groups { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  article.doc { padding: 36px 40px; }
}
@media (min-width: 880px) {
  .hero { padding: 48px 0 56px; }
  .hero .wrap { grid-template-columns: 1.15fr .85fr; gap: 48px; }
  .hero .shot { max-width: 340px; margin-right: 0; }
  .hero figure { justify-self: end; }
  footer.site .wrap { grid-template-columns: 1fr auto; align-items: start; }
}

/* 首页扩展:步骤、深色画廊、机型表、语言 */
.steps { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 14px; grid-template-columns: 1fr; counter-reset: s; }
.steps li { display: flex; gap: 16px; align-items: flex-start; background: var(--card); border: 1px solid var(--hair); border-radius: 28px; padding: 20px; box-shadow: var(--shadow); }
.steps .n { flex: none; width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; font-size: 1.7rem; color: var(--on-btn); background: linear-gradient(160deg, var(--b1), var(--b2)); }
.steps h3 { font-size: 1.4rem; margin: 2px 0 6px; }
.steps p { margin: 0; color: var(--pencil); }
.gallery.four { grid-template-columns: repeat(2, 1fr); }
.tbl-wrap { overflow-x: auto; margin-top: 28px; border-radius: 24px; border: 1px solid var(--hair); background: var(--card); box-shadow: var(--shadow); }
.tbl { width: 100%; border-collapse: collapse; min-width: 520px; }
.tbl th, .tbl td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--hair); vertical-align: top; }
.tbl thead th { font-family: "NC Narrow", system-ui, sans-serif; font-size: 1.1rem; }
.tbl tbody th { font-weight: 700; }
.tbl tr:last-child th, .tbl tr:last-child td { border-bottom: 0; }
.chips { list-style: none; margin: 24px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.chips li { background: var(--card); border: 1px solid var(--hair); border-radius: 999px; padding: 8px 16px; box-shadow: var(--shadow); }
@media (min-width: 640px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .steps li { flex-direction: column; }
  .gallery.four { grid-template-columns: repeat(4, 1fr); }
}