/* ==========================================================================
   AOSHI — aoshicold.com  |  v2 design system
   Editorial light layout, brand green taken from the AOSHI logo (#079D55).
   Deliberately different from the dark navy/cyan look common in this sector.
   Zero external dependencies.
   ========================================================================== */

:root {
  --green: #079d55;
  --green-text: #06703d;  /* AA on white, 6.2:1 */
  --green-btn: #067a43;   /* AA with white label, 5.4:1 */
  --green-btn-h: #056b3a;
  --green-deep: #06231a;
  --green-ink: #0c2318;
  --green-bright: #38d27c;
  --green-tint: #e7f4ec;
  --green-tint-2: #f2f8f4;
  --paper: #ffffff;
  --paper-2: #f5f8f4;
  --line: #dce5dd;
  --line-2: #eaf0ea;
  --text: #0e1b14;
  --muted: #5a6b60;
  --muted-2: #87968c;
  --shadow-sm: 0 1px 2px rgba(6, 35, 26, .05);
  --shadow-md: 0 12px 30px rgba(6, 35, 26, .08);
  --maxw: 1220px;
  --r: 2px;
  --ff: "Helvetica Neue", Helvetica, "Segoe UI", Roboto, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(.22, .68, .28, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--ff); font-size: 16.5px; line-height: 1.72; color: var(--text); background: var(--paper); -webkit-font-smoothing: antialiased; }
html[lang="zh-CN"] body { line-height: 1.85; letter-spacing: .01em; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3, h4 { margin: 0 0 .55em; line-height: 1.16; letter-spacing: -.02em; font-weight: 700; }
h1 { font-size: clamp(2.15rem, 4.4vw, 3.6rem); }
h2 { font-size: clamp(1.62rem, 3vw, 2.35rem); }
h3 { font-size: 1.15rem; letter-spacing: -.01em; }
html[lang="zh-CN"] h1, html[lang="zh-CN"] h2, html[lang="zh-CN"] h3 { letter-spacing: .01em; }
ul { margin: 0 0 1em; padding-left: 1.1em; }
li { margin-bottom: .5em; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.wrap-narrow { max-width: 880px; }

/* ---------------- type helpers ---------------- */
.kicker { display: flex; align-items: center; gap: 12px; font-size: .71rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--green-text); margin-bottom: 18px; }
.kicker::before { content: ""; width: 26px; height: 1px; background: var(--green); }
.kicker--light { color: var(--green-bright); }
.kicker--light::before { background: var(--green-bright); }
.lede { font-size: 1.08rem; color: var(--muted); max-width: 66ch; }
.lede--light { color: #a8c0b2; }
.muted { color: var(--muted); }
.hr { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------------- buttons ---------------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 14px 24px; font-size: .92rem; font-weight: 650; letter-spacing: .01em; border-radius: var(--r); border: 1px solid transparent; cursor: pointer; transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease); }
.btn:hover { transform: translateY(-1px); }
.btn-pri { background: var(--green-btn); color: #fff; }
.btn-pri:hover { background: var(--green-btn-h); }
.btn-line { border-color: var(--line); color: var(--text); background: #fff; }
.btn-line:hover { border-color: var(--green-text); color: var(--green-text); }
.btn-ghost { border-color: rgba(255, 255, 255, .34); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }
.arrow { display: inline-flex; align-items: center; gap: 8px; font-weight: 650; font-size: .89rem; color: var(--green-text); }
.arrow::after { content: "→"; transition: transform .18s var(--ease); }
.arrow:hover::after { transform: translateX(4px); }
.arrow--light { color: var(--green-bright); }

/* ---------------- header ---------------- */
.hdr { position: sticky; top: 0; z-index: 60; background: rgba(255, 255, 255, .97); backdrop-filter: saturate(150%) blur(8px); border-bottom: 1px solid var(--line); }
.hdr-in { display: flex; align-items: center; gap: 22px; min-height: 76px; }
.brand { display: flex; align-items: center; flex: 0 0 auto; }
.brand img { height: 48px; width: auto; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 2px; position: relative; z-index: 25; }
.nav > a, .nav .trig { display: block; padding: 10px 13px; font-size: .9rem; font-weight: 550; color: #33453a; border-radius: var(--r); background: none; border: 0; cursor: pointer; font-family: inherit; }
.nav > a:hover, .nav .trig:hover { color: var(--green-text); background: var(--green-tint-2); }
.nav > a[aria-current="page"] { color: var(--green-text); box-shadow: inset 0 -2px 0 var(--green); }
.hasdrop { position: relative; }
.hasdrop .trig::after { content: "▾"; font-size: .78em; margin-left: 6px; opacity: .65; }
.hasdrop .trig[data-active="1"] { color: var(--green-text); box-shadow: inset 0 -2px 0 var(--green); }
.drop { position: absolute; top: calc(100% + 2px); left: 0; min-width: 250px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-md); padding: 6px; opacity: 0; visibility: hidden; transform: translateY(-4px); transition: opacity .15s var(--ease), transform .15s var(--ease), visibility .15s; }
.hasdrop:hover .drop, .hasdrop:focus-within .drop, .hasdrop.open .drop { opacity: 1; visibility: visible; transform: none; }
.hasdrop:last-child .drop { left: auto; right: 0; }
.drop a { display: block; padding: 9px 12px; font-size: .88rem; color: #2d3f34; border-radius: 2px; }
.drop a:hover { background: var(--green-tint); color: var(--green-text); }
.drop a span { display: block; font-size: .73rem; color: var(--muted-2); font-weight: 500; }
.hdr-right { display: flex; align-items: center; gap: 8px; margin-left: 10px; }
.hdr-right .btn { padding: 11px 16px; font-size: .86rem; }
.lang { display: flex; align-items: center; font-size: .8rem; font-weight: 650; letter-spacing: .04em; color: var(--muted); }
.lang a { padding: 6px 7px; border-radius: 2px; }
.lang a:hover { color: var(--green-text); background: var(--green-tint-2); }
.lang .on { color: var(--green-text); }
.lang .sep { color: var(--line); }
.burger { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 2px; padding: 0; cursor: pointer; }
.burger i { display: block; width: 18px; height: 1.6px; background: var(--text); margin: 0 auto 4px; }
.burger i:last-child { margin-bottom: 0; }
.mnav { display: none; border-top: 1px solid var(--line); padding: 6px 0 18px; background: #fff; }
.mnav.open { display: block; }
.mnav a { display: block; padding: 11px 2px; font-size: .95rem; border-bottom: 1px solid var(--line-2); }
.mnav .sub { padding-left: 16px; font-size: .89rem; color: var(--muted); }

/* ---------------- home hero (split) ---------------- */
.hero2 { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; }
.hero2-copy { padding: 84px 54px 84px max(28px, calc((100vw - var(--maxw)) / 2 + 28px)); display: flex; flex-direction: column; justify-content: center; }
.hero2-copy h1 { max-width: 16ch; }
.hero2-media { position: relative; min-height: 560px; background: var(--green-tint); }
.hero2-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero2-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255, 255, 255, .9), rgba(255, 255, 255, 0) 34%); }
.hero2-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.tagrow { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 34px; padding-top: 24px; border-top: 1px solid var(--line); }
.tag { padding: 5px 10px; font-size: .71rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: #0a7a44; background: var(--green-tint); border-radius: 100px; }
.tag--line { background: #fff; border: 1px solid var(--line); color: var(--muted); }

/* ---------------- stat bar ---------------- */
.statbar { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper-2); }
.statrow { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 30px 26px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { display: block; font-size: 1.78rem; font-weight: 700; letter-spacing: -.03em; color: var(--green-ink); }
.stat span { display: block; font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--green-text); margin-top: 2px; }
.stat small { display: block; font-size: .81rem; color: var(--muted-2); margin-top: 6px; }

/* ---------------- sections ---------------- */
.sec { padding: 92px 0; }
.sec--tight { padding: 62px 0; }
.sec-tint { background: var(--paper-2); }
.sec-dark { background: var(--green-deep); color: #eaf2ec; }
.sec-dark h2 { color: #fff; }
.sec-dark .lede { color: #a8c0b2; }
.sec-head { max-width: 780px; margin-bottom: 52px; }
.sec-head--row { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; max-width: none; }

/* ---------------- product tiles ---------------- */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.tile { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease); }
.tile:hover { border-color: var(--green); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.tile-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--green-tint-2); }
.tile-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s var(--ease); }
.tile:hover .tile-media img { transform: scale(1.04); }
.tile-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.tile-body h3 { margin-bottom: 8px; }
.tile-body p { font-size: .89rem; color: var(--muted); margin-bottom: 16px; line-height: 1.6; }
.tile-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; font-weight: 700; }
.tile-meta span { padding: 4px 8px; border: 1px solid var(--line); color: #456052; border-radius: 2px; background: var(--paper-2); }
.tile-meta .hs { background: var(--green-tint); border-color: #cfe7d8; color: #0a7a44; }
.tile-body .arrow { margin-top: auto; font-size: .84rem; }

/* ---------------- features ---------------- */
.feat { padding: 22px 0; border-top: 1px solid var(--line); }
.feat:last-child { border-bottom: 1px solid var(--line); }
.feat h3 { font-size: 1.02rem; margin-bottom: 6px; }
.feat p { font-size: .9rem; color: var(--muted); margin: 0; }
.sec-dark .feat { border-color: rgba(255, 255, 255, .14); }
.sec-dark .feat h3 { color: #fff; }
.sec-dark .feat p { color: #a8c0b2; }

/* ---------------- split ---------------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split--imgwide { grid-template-columns: .95fr 1.05fr; }
.split-media { position: relative; overflow: hidden; border-radius: var(--r); background: var(--green-tint-2); }
.split-media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.split-media--sq img { aspect-ratio: 1 / 1; }

/* ---------------- numbered steps ---------------- */
.steps2 { counter-reset: st; }
.step2 { display: grid; grid-template-columns: 64px 1fr; gap: 22px; padding: 24px 0; border-top: 1px solid rgba(255, 255, 255, .14); }
.step2:last-child { border-bottom: 1px solid rgba(255, 255, 255, .14); }
.step2::before { counter-increment: st; content: "0" counter(st); font-size: .8rem; font-weight: 700; letter-spacing: .12em; color: var(--green-bright); }
.step2 h3 { font-size: 1.02rem; color: #fff; margin-bottom: 5px; }
.step2 p { font-size: .9rem; color: #a8c0b2; margin: 0; }
.steps2--light .step2 { border-color: var(--line); }
.steps2--light .step2::before { color: var(--green-text); }
.steps2--light .step2 h3 { color: var(--text); }
.steps2--light .step2 p { color: var(--muted); }

/* plain image figures keep their own ratio */
.grid3 figure img, .grid2 figure img, .grid4 figure img { width: 100%; height: auto; }

/* ---------------- gallery ---------------- */
.gal { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gal figure { margin: 0; overflow: hidden; border-radius: var(--r); border: 1px solid var(--line); cursor: zoom-in; background: var(--paper-2); }
.gal img { width: 100%; height: 250px; object-fit: cover; transition: transform .5s var(--ease); }
.gal figure:hover img { transform: scale(1.04); }
.lb { position: fixed; inset: 0; z-index: 120; display: none; align-items: center; justify-content: center; background: rgba(6, 20, 14, .95); padding: 4vh 4vw; }
.lb.open { display: flex; }
.lb img { max-width: 100%; max-height: 90vh; object-fit: contain; }
.lb-close, .lb-nav { position: absolute; width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer; color: #fff; background: rgba(255, 255, 255, .13); font-size: 20px; }
.lb-close { top: 18px; right: 20px; font-size: 24px; }
.lb-prev { left: 14px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 14px; top: 50%; transform: translateY(-50%); }

/* ---------------- inner page hero ---------------- */
.phero { background: var(--paper-2); border-bottom: 1px solid var(--line); padding: 58px 0 52px; position: relative; overflow: hidden; }
.phero--img { padding: 94px 0 78px; color: #fff; border-bottom: 0; background: var(--green-deep); }
.phero-bg { position: absolute; inset: 0; }
.phero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .62; }
.phero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(95deg, rgba(5, 25, 18, .93) 6%, rgba(5, 25, 18, .58) 58%, rgba(5, 25, 18, .34)); }
.phero-in { position: relative; z-index: 2; max-width: 800px; }
.phero--img h1 { color: #fff; }
.phero--img .lede { color: #c6d8cc; }
.crumbs { font-size: .73rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 20px; }
.phero--img .crumbs { color: #8fae9d; }
.crumbs a:hover { color: var(--green-text); }
.phero--img .crumbs a:hover { color: #fff; }
.crumbs span { margin: 0 8px; opacity: .5; }

/* ---------------- table ---------------- */
.tbl { width: 100%; border-collapse: collapse; font-size: .92rem; }
.tbl th, .tbl td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { width: 35%; font-weight: 650; color: var(--text); background: var(--paper-2); }
.tbl tr:last-child th, .tbl tr:last-child td { border-bottom: 0; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.pill { padding: 6px 11px; font-size: .74rem; font-weight: 650; border: 1px solid var(--line); border-radius: 100px; color: #43584b; background: #fff; cursor: pointer; font-family: inherit; }
.pill:hover { border-color: var(--green-text); color: var(--green-text); }
.pill--on { background: var(--green-btn); border-color: var(--green-btn); color: #fff; }
.pill--tint { background: var(--green-tint); border-color: #cfe7d8; color: #0a7a44; cursor: default; }

/* ---------------- faq ---------------- */
.faq2 { border-top: 1px solid var(--line); }
.faq2 details { border-bottom: 1px solid var(--line); }
.faq2 summary { cursor: pointer; list-style: none; padding: 22px 44px 22px 0; position: relative; font-weight: 620; }
.faq2 summary::-webkit-details-marker { display: none; }
.faq2 summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); color: var(--green-text); font-size: 1.3rem; font-weight: 400; }
.faq2 details[open] summary::after { content: "–"; }
.faq2 .ans { padding: 0 46px 24px 0; color: var(--muted); font-size: .93rem; }
.faq2 .ans p:last-child { margin-bottom: 0; }

/* ---------------- cta ---------------- */
.cta2 { background: var(--green-deep); color: #fff; padding: 78px 0; position: relative; overflow: hidden; }
.cta2::before { content: ""; position: absolute; inset: 0; background: radial-gradient(720px 340px at 18% 0%, rgba(56, 210, 124, .22), transparent 70%); }
.cta2 .wrap { position: relative; z-index: 2; }
.cta2 h2 { color: #fff; max-width: 26ch; }
.cta2 p { color: #a8c0b2; max-width: 62ch; }
.cta2-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* ---------------- contact ---------------- */
.cgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.ilog { display: grid; gap: 22px; margin-top: 30px; }
.ilog .it { display: grid; grid-template-columns: 30px 1fr; gap: 14px; align-items: start; }
.ilog .ic { width: 30px; height: 30px; display: grid; place-items: center; color: var(--green-text); background: var(--green-tint); border-radius: 50%; }
.ilog .ic svg { width: 15px; height: 15px; }
.ilog b { display: block; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 3px; }
.ilog a, .ilog p { font-size: .98rem; margin: 0; word-break: break-word; }
.ilog a:hover { color: var(--green-text); }
.form2 { background: #fff; border: 1px solid var(--line); padding: 32px; box-shadow: var(--shadow-sm); }
.f2 { margin-bottom: 16px; }
.f2 label { display: block; font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: #4c6156; margin-bottom: 7px; }
.f2 input, .f2 select, .f2 textarea { width: 100%; padding: 12px 13px; font: inherit; font-size: .94rem; color: var(--text); border: 1px solid var(--line); border-radius: 2px; background: #fff; transition: border-color .16s var(--ease), box-shadow .16s var(--ease); }
.f2 input:focus, .f2 select:focus, .f2 textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(7, 157, 85, .12); }
.f2 textarea { min-height: 108px; resize: vertical; }
.f2row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.fnote { font-size: .8rem; color: var(--muted-2); margin: 12px 0 0; }

/* ---------------- footer ---------------- */
.ftr { background: var(--green-deep); color: #9fb8a8; padding: 66px 0 28px; font-size: .9rem; }
.ftr-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 44px; border-bottom: 1px solid rgba(255, 255, 255, .12); }
.ftr h4 { color: #fff; font-size: .72rem; letter-spacing: .15em; text-transform: uppercase; margin-bottom: 16px; }
.ftr a:hover { color: var(--green-bright); }
.ftr-col a { display: block; padding: 4px 0; }
.ftr-brand img { height: 46px; width: auto; margin-bottom: 18px; }
.ftr-brand p { font-size: .86rem; color: #8fae9d; max-width: 34ch; }
.ftr-bot { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding-top: 22px; font-size: .78rem; color: #8fae9d; }

/* ---------------- motion ---------------- */
.rv { opacity: 1; transform: none; transition: opacity .6s var(--ease), transform .6s var(--ease); }
html.js .rv:not(.in) { opacity: 0; transform: translateY(14px); }
@media (prefers-reduced-motion: reduce) { .rv { transition: none; } html.js .rv:not(.in) { opacity: 1; transform: none; } html { scroll-behavior: auto; } }

/* ---------------- responsive ---------------- */
@media (max-width: 1080px) {
  .grid4 { grid-template-columns: repeat(2, 1fr); }
  .grid3 { grid-template-columns: repeat(2, 1fr); }
  .split, .split--imgwide, .cgrid { grid-template-columns: 1fr; gap: 36px; }
  .hero2 { grid-template-columns: 1fr; }
  .hero2-copy { padding: 56px 28px 46px; }
  .hero2-media { min-height: 320px; }
  .hero2-media::after { background: linear-gradient(0deg, rgba(255, 255, 255, .85), rgba(255, 255, 255, 0) 42%); }
  .statrow { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .stat:nth-child(-n+2) { border-top: 0; }
  .stat:nth-child(even) { border-left: 1px solid var(--line); padding-left: 24px; }
  .ftr-top { grid-template-columns: 1fr 1fr; gap: 34px; }
}
@media (max-width: 860px) {
  .nav, .hdr-right .btn { display: none; }
  .burger { display: block; margin-left: 6px; }
  .hdr-in { min-height: 66px; gap: 8px; }
  .brand img { height: 38px; }
  .kicker::before { display: none; }
  .kicker { letter-spacing: .14em; }
  .lang a { padding: 5px 5px; }
  .hero2-media { min-height: 240px; }
  .sec { padding: 60px 0; }
  .sec-head { margin-bottom: 34px; }
  .sec-head--row { display: block; }
  .grid3, .grid2, .grid4 { grid-template-columns: 1fr; }
  .gal { grid-template-columns: repeat(2, 1fr); }
  .gal img { height: 170px; }
  .f2row { grid-template-columns: 1fr; }
  .ftr-top { grid-template-columns: 1fr; }
  .ftr-bot { flex-direction: column; }
  .step2 { grid-template-columns: 44px 1fr; gap: 12px; }
  .form2 { padding: 22px; }
  .stat b { font-size: 1.3rem; }
  .stat span { font-size: .68rem; }
  .stat small { font-size: .77rem; }
  .phero--img { padding: 66px 0 54px; }
}

/* ---------------- v2.2 additions ---------------- */
.lb-count { position: absolute; top: 22px; left: 24px; color: rgba(255,255,255,.75); font-size: .85rem; letter-spacing: .1em; }
.f2-hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.fnote.ok { color: #06703d; }
.fnote.err { color: #b3261e; }
.ink { color: #41566a; }
.ink-sm { color: #41566a; font-size: .95rem; }
.muted-light { color: #a8c0b2; }
.frame { margin: 0; border: 1px solid var(--line); }
.ftr-note { font-size: .83rem; color: #8fae9d; }
.ftr-note--tight { margin-top: 12px; }
.pills--mt { margin-top: 22px; }
.grid2--wide { gap: 56px; }
.mt-26 { margin-top: 26px; }
.hero2-media picture, .phero-bg picture { position: absolute; inset: 0; }