/* 和芳集 v7: Chinese-first, phone-first. System fonts only (no Google Fonts) so pages open instantly in mainland China. */
:root {
  color-scheme: light;
  --paper: #FFFFFF;
  --mist: #F7F4EC;
  --mint: #E8EFEA;
  --line: #E7E1D3;
  --ink: #13261F;
  --muted: #5E6B66;
  --teal: #1F5A4E;
  --teal-hover: #17483E;
  --teal-deep: #0F2C25;
  --on-deep: #EEF2EC;
  --on-deep-muted: #A8B8B0;
  --apricot-soft: #F3ECDD;
  --apricot-deep: #8C6B38;
  --gold: #C6A46A;
  --serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --wechat: #07C160;
  --font: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --wrap: 1120px;
  --r: 16px;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; padding-bottom: 64px; }
@media (min-width: 900px) { body { padding-bottom: 0; } }
a { color: inherit; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 2px solid var(--apricot-deep); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 700; text-wrap: balance; font-family: var(--serif); letter-spacing: .02em; }
.ph h1 small { font-family: var(--font); letter-spacing: 0; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 700px) { .wrap { padding: 0 24px; } }
.mono { font-family: var(--mono); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 600 15px/1 var(--font); padding: 13px 22px; border-radius: 999px; border: 1px solid var(--teal); background: var(--teal); color: #fff; text-decoration: none; cursor: pointer; white-space: nowrap; transition: background .15s, border-color .15s; }
.btn:hover { background: var(--teal-hover); border-color: var(--teal-hover); }
.btn.ghost { background: #fff; color: var(--teal-deep); border-color: var(--line); }
.btn.ghost:hover { background: var(--mist); }
.btn.wx { background: var(--wechat); border-color: var(--wechat); }
.btn.wx:hover { background: #06AD56; border-color: #06AD56; }
.btn.sm { padding: 9px 16px; font-size: 14px; }
.btn svg { width: 18px; height: 18px; flex: none; }

/* header */
.hdr { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.94); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.hdr .wrap { display: flex; align-items: center; gap: 12px; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; min-width: 0; }
.logo img { width: 36px; height: 36px; object-fit: contain; }
.logo b { font-size: 17px; letter-spacing: .04em; }
.logo small { display: block; font-size: 11px; color: var(--muted); letter-spacing: .08em; line-height: 1.2; }
.nav { display: none; gap: 2px; margin-left: auto; }
.nav a { text-decoration: none; color: var(--muted); padding: 8px 12px; border-radius: 999px; font-size: 15px; font-weight: 500; }
.nav a:hover, .nav a[aria-current] { color: var(--teal); background: var(--mist); }
.hdr .tel { margin-left: auto; font-weight: 700; text-decoration: none; color: var(--teal-deep); display: flex; align-items: center; gap: 6px; font-size: 15px; white-space: nowrap; }
.hdr .tel svg { width: 18px; height: 18px; color: var(--teal); }
.hdr .en { font-size: 13px; color: var(--muted); text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }
@media (min-width: 900px) { .nav { display: flex; } .hdr .tel { margin-left: 8px; } }

/* sections */
.s { padding: 48px 0; }
@media (min-width: 900px) { .s { padding: 72px 0; } }
.s.mist { background: var(--mist); }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .12em; color: var(--apricot-deep); margin-bottom: 8px; }
.s h2 { font-size: clamp(22px, 4vw, 30px); }
.lead { color: var(--muted); margin-top: 10px; max-width: 640px; }
.head { margin-bottom: 28px; }

/* hero */
.hero { position: relative; background: #F6EEE2; overflow: hidden; }
.hero .bg { position: absolute; inset: 0; background: url(/hero.jpg) center right / cover no-repeat; }
.hero .bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(255,252,247,.84) 0%, rgba(255,252,247,.94) 55%, #FFFCF7 100%); }
@media (min-width: 900px) { .hero .bg::after { background: linear-gradient(90deg, rgba(255,252,247,.96) 0%, rgba(255,252,247,.85) 38%, rgba(255,252,247,.1) 70%, rgba(255,252,247,0) 100%); } }
.hero .wrap { position: relative; padding-top: 44px; padding-bottom: 40px; }
@media (min-width: 900px) { .hero .wrap { padding-top: 84px; padding-bottom: 84px; } }
.live { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.88); border: 1px solid rgba(23,63,55,.12); border-radius: 999px; padding: 4px 14px 4px 12px; font-size: 13px; font-weight: 500; color: var(--teal-deep); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--wechat); flex: none; }
.hero h1 { font-size: clamp(28px, 6vw, 46px); margin-top: 16px; max-width: 620px; }
.hero p.sub { margin-top: 14px; font-size: 17px; color: var(--muted); max-width: 560px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.ticks { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 22px 0 0; padding: 0; list-style: none; font-size: 14px; color: var(--teal-deep); font-weight: 500; }
.ticks li::before { content: "✓"; color: var(--teal); margin-right: 6px; font-weight: 700; }

/* brand strip */
.brands { border-bottom: 1px solid var(--line); background: #fff; }
.brands .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; padding-top: 16px; padding-bottom: 16px; }
.brands span.k { font-size: 13px; color: var(--muted); margin-right: 4px; }
.tag { display: inline-block; border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 3px 12px; font-size: 14px; font-weight: 600; color: var(--teal-deep); white-space: nowrap; }
.tag.y { background: var(--apricot-soft); border-color: transparent; color: var(--apricot-deep); }

/* industry cards */
.grid { display: grid; gap: 14px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1000px) { .grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 20px; min-width: 0; }
.card h3 { font-size: 18px; display: flex; align-items: center; gap: 10px; }
.card h3 .ic { width: 36px; height: 36px; border-radius: 10px; background: var(--mint); color: var(--teal-deep); display: grid; place-items: center; font-size: 18px; flex: none; }
.card p { color: var(--muted); font-size: 14px; margin-top: 8px; }
.links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.links a { font-size: 13px; text-decoration: none; background: var(--mist); color: var(--teal-deep); border-radius: 999px; padding: 4px 11px; }
.links a:hover { background: var(--mint); }

/* product catalog */
.cat + .cat { margin-top: 32px; }
.cat h3 { font-size: 18px; margin-bottom: 12px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.cat h3 small { font-size: 13px; color: var(--muted); font-weight: 400; }
.plist { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); }
.pi { display: flex; align-items: center; gap: 12px; text-decoration: none; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; transition: border-color .15s, box-shadow .15s; min-width: 0; }
.pi:hover { border-color: var(--teal); box-shadow: 0 4px 16px rgba(23,63,55,.08); }
.pi .mk { width: 44px; height: 44px; border-radius: 12px; background: var(--mint); color: var(--teal-deep); display: grid; place-items: center; font: 700 12px var(--mono); flex: none; }
.pi b { display: block; font-size: 15px; }
.pi small { display: block; color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pi .new { font-size: 11px; color: var(--apricot-deep); background: var(--apricot-soft); border-radius: 999px; padding: 0 7px; margin-left: 6px; font-weight: 600; }

/* why us */
.why { display: grid; gap: 14px; grid-template-columns: minmax(0, 1fr); align-items: start; }
@media (min-width: 900px) { .why { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; } }
.feats { display: grid; gap: 12px; }
.feat { display: flex; gap: 14px; align-items: flex-start; }
.feat .n { width: 32px; height: 32px; border-radius: 50%; background: var(--teal); color: #fff; display: grid; place-items: center; font-weight: 700; flex: none; font-size: 14px; }
.feat b { display: block; }
.feat p { color: var(--muted); font-size: 14px; }
.photos { display: grid; gap: 10px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 560px) and (max-width: 899px) { .photos { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.photos img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: center 70%; border-radius: 14px; }
.photos figcaption { grid-column: 1 / -1; font-size: 13px; color: var(--muted); }

/* certs */
.certs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }

/* oem band */
.band { background: var(--teal-deep); color: var(--on-deep); }
.band .wrap { padding-top: 48px; padding-bottom: 48px; display: grid; gap: 20px; }
@media (min-width: 900px) { .band .wrap { grid-template-columns: minmax(0, 1fr) auto; align-items: center; } }
.band h2 { color: #fff; font-size: clamp(22px, 4vw, 28px); }
.band p { color: var(--on-deep-muted); margin-top: 8px; }
.steps { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; padding: 0; list-style: none; counter-reset: s; }
.steps li { counter-increment: s; font-size: 13px; background: rgba(255,255,255,.08); border-radius: 999px; padding: 4px 12px; }
.steps li::before { content: counter(s) " · "; color: #fff; font-weight: 700; }

/* inquiry */
.inq { display: grid; gap: 24px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .inq { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); } }
.form { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 20px; display: grid; gap: 14px; }
.row2 { display: grid; gap: 14px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 560px) { .row2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.f { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.f input, .f textarea { font: 400 16px var(--font); color: var(--ink); border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px; width: 100%; background: #fff; }
.f input:focus, .f textarea:focus { outline: 2px solid var(--teal); outline-offset: 0; border-color: transparent; }
.f textarea { min-height: 84px; resize: vertical; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 500 14px var(--font); border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--teal); border-color: var(--teal); color: #fff; }
.acts { display: flex; flex-wrap: wrap; gap: 10px; }
.msg { font-size: 14px; color: var(--teal-deep); background: var(--mint); border-radius: 10px; padding: 10px 12px; }
.contact { display: grid; gap: 12px; align-content: start; }
.ci { display: flex; gap: 12px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px; text-decoration: none; min-width: 0; }
.ci .ic { width: 40px; height: 40px; border-radius: 12px; background: var(--mint); color: var(--teal-deep); display: grid; place-items: center; flex: none; }
.ci .ic svg { width: 20px; height: 20px; }
.ci small { display: block; color: var(--muted); font-size: 12px; }
.ci b { display: block; font-size: 16px; overflow-wrap: anywhere; }
.qr { display: flex; gap: 14px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px; }
.qr img { width: 112px; height: 112px; border-radius: 8px; flex: none; }
.qr p { font-size: 14px; color: var(--muted); }
.qr b { color: var(--ink); display: block; font-size: 16px; }

/* product page */
.crumb { font-size: 13px; color: var(--muted); padding-top: 18px; }
.crumb a { text-decoration: none; }
.crumb a:hover { color: var(--teal); }
.ph { padding: 18px 0 32px; border-bottom: 1px solid var(--line); }
.ph .alt { font: 500 13px var(--mono); color: var(--apricot-deep); letter-spacing: .04em; }
.ph h1 { font-size: clamp(26px, 5vw, 38px); margin-top: 6px; }
.ph h1 small { display: block; font-size: 16px; color: var(--muted); font-weight: 500; margin-top: 4px; }
.ph p.intro { margin-top: 14px; max-width: 720px; font-size: 17px; }
.ph .cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.specs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 22px; max-width: 720px; }
@media (min-width: 640px) { .specs { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.specs div { background: var(--mist); border-radius: 12px; padding: 10px 12px; min-width: 0; }
.specs small { display: block; font-size: 12px; color: var(--muted); }
.specs span { font: 600 15px var(--mono); overflow-wrap: anywhere; }
.pbody { display: grid; gap: 28px; grid-template-columns: minmax(0, 1fr); padding: 32px 0 48px; }
@media (min-width: 900px) { .pbody { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 48px; } }
.pbody h2 { font-size: 20px; margin-bottom: 10px; }
.pbody section + section { margin-top: 28px; }
.kv { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 8px 14px; margin: 0; }
.kv dt { color: var(--muted); font-size: 14px; }
.kv dd { margin: 0; }
.side { display: grid; gap: 14px; align-content: start; }
.box { background: var(--mist); border-radius: var(--r); padding: 18px; }
.box h2 { font-size: 17px; margin-bottom: 8px; }
.box p { font-size: 14px; color: var(--muted); }
.note { font-size: 13px; color: var(--muted); margin-top: 18px; }

/* footer */
.ft { background: #0F2A25; color: var(--on-deep-muted); font-size: 14px; }
.ft .wrap { padding-top: 36px; padding-bottom: 36px; display: grid; gap: 20px; }
@media (min-width: 900px) { .ft .wrap { grid-template-columns: 1.4fr 1fr 1fr; } }
.ft b { color: #fff; display: block; margin-bottom: 6px; }
.ft a { color: var(--on-deep); text-decoration: none; }
.ft a:hover { text-decoration: underline; }
.ft ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.ft .copy { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,.1); padding-top: 14px; font-size: 12px; }

/* mobile bottom bar */
.bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; display: grid; grid-template-columns: repeat(3, 1fr); background: #fff; border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom, 0px); }
.bar a, .bar button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; height: 58px; font: 600 12px var(--font); color: var(--teal-deep); background: none; border: 0; text-decoration: none; cursor: pointer; }
.bar svg { width: 22px; height: 22px; }
.bar .w { color: var(--wechat); }
@media (min-width: 900px) { .bar { display: none; } }

/* wechat dialog */
.ov { position: fixed; inset: 0; z-index: 80; background: rgba(15,42,37,.55); display: grid; place-items: center; padding: 16px; }
.dlg { background: #fff; border-radius: 20px; padding: 24px; width: min(100%, 340px); text-align: center; position: relative; }
.dlg img { width: 220px; height: 220px; margin: 12px auto; }
.dlg h2 { font-size: 19px; }
.dlg p { font-size: 14px; color: var(--muted); }
.dlg .x { position: absolute; top: 10px; right: 10px; width: 36px; height: 36px; border-radius: 50%; border: 0; background: var(--mist); cursor: pointer; font-size: 18px; color: var(--ink); }
.dlg .acts { justify-content: center; margin-top: 14px; }
.toast { position: fixed; left: 50%; bottom: 84px; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 999px; font-size: 14px; z-index: 90; }