/* Hunan Dye Natural Resource Inc. – dyenaturalresource.com
   B2B ingredients supplier website. Green / natural / professional tone. */

:root {
  --green-900: #0d3b2e;
  --green-800: #14513e;
  --green-700: #1a6b50;
  --green-100: #e8f3ee;
  --green-50: #f4faf7;
  --gold: #c9a227;
  --ink: #1f2937;
  --ink-soft: #4b5563;
  --line: #e5e7eb;
  --white: #ffffff;
  --radius: 10px;
  --maxw: 1120px;
  --font: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--ink); background: var(--white); line-height: 1.65; }
img { max-width: 100%; display: block; }
a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 38px; height: 38px; border-radius: 8px; background: linear-gradient(135deg, var(--green-800), var(--green-700)); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px; letter-spacing: .5px; }
.brand-name { font-size: 16px; font-weight: 700; color: var(--green-900); line-height: 1.2; }
.brand-name small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-soft); letter-spacing: .4px; }
.nav { display: flex; gap: 26px; align-items: center; }
.nav a { color: var(--ink-soft); font-size: 14.5px; font-weight: 600; }
.nav a:hover, .nav a.active { color: var(--green-700); text-decoration: none; }
.nav .btn-sm { color: #fff; }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 18px 24px; gap: 14px; border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
  .nav-toggle { display: block; background: none; border: none; font-size: 22px; color: var(--green-900); cursor: pointer; }
}

/* ---------- Buttons ---------- */
.btn { display: inline-block; padding: 12px 26px; border-radius: var(--radius); font-weight: 700; font-size: 15px; border: none; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--green-700); color: #fff; box-shadow: 0 4px 14px rgba(26,107,80,.25); }
.btn-primary:hover { background: var(--green-800); color: #fff; }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.7); }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 13.5px; }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(120deg, var(--green-900) 0%, var(--green-800) 55%, var(--green-700) 100%); color: #fff; padding: 84px 0 90px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -140px; top: -140px; width: 460px; height: 460px; border-radius: 50%; background: radial-gradient(circle, rgba(201,162,39,.18), transparent 65%); }
.hero-badge { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25); color: #dff0e8; font-size: 13px; font-weight: 600; padding: 6px 14px; border-radius: 999px; margin-bottom: 22px; letter-spacing: .3px; }
.hero h1 { font-size: clamp(30px, 4.6vw, 46px); line-height: 1.15; font-weight: 800; max-width: 760px; margin-bottom: 18px; }
.hero h1 em { color: #f2d475; font-style: normal; }
.hero p.lead { font-size: 18px; color: #d7e8e0; max-width: 640px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 48px; margin-top: 54px; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 30px; color: #fff; }
.hero-stats .stat span { font-size: 13.5px; color: #b9d4c9; }

/* ---------- Sections ---------- */
.section { padding: 72px 0; }
.section.alt { background: var(--green-50); }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head .kicker { color: var(--green-700); font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; font-size: 12.5px; margin-bottom: 10px; }
.section-head h2 { font-size: clamp(24px, 3.2vw, 34px); color: var(--green-900); line-height: 1.2; margin-bottom: 12px; }
.section-head p { color: var(--ink-soft); font-size: 16px; }

/* ---------- Cards: categories ---------- */
.grid { display: grid; gap: 22px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-4, .grid-3 { grid-template-columns: 1fr; } }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; transition: box-shadow .2s ease, transform .2s ease; }
.card:hover { box-shadow: 0 12px 30px rgba(13,59,46,.10); transform: translateY(-3px); }
.card .icon { width: 46px; height: 46px; border-radius: 10px; background: var(--green-100); color: var(--green-800); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 16px; }
.card h3 { font-size: 17.5px; color: var(--green-900); margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--ink-soft); }
.card .more { display: inline-block; margin-top: 12px; font-size: 14px; font-weight: 700; }

/* ---------- Product cards ---------- */
.product-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: box-shadow .2s ease, transform .2s ease; }
.product-card:hover { box-shadow: 0 12px 30px rgba(13,59,46,.10); transform: translateY(-3px); }
.product-thumb { height: 150px; background: linear-gradient(135deg, var(--green-100), #dcefe6); display: flex; align-items: center; justify-content: center; }
.product-thumb .chem { font-weight: 800; color: var(--green-800); font-size: 20px; letter-spacing: .5px; opacity: .75; }
.product-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { font-size: 16.5px; color: var(--green-900); margin-bottom: 6px; }
.product-body .cn { font-size: 13px; color: var(--ink-soft); margin-bottom: 10px; }
.product-body .spec { display: inline-block; font-size: 12.5px; font-weight: 700; color: var(--green-800); background: var(--green-100); border-radius: 999px; padding: 4px 12px; margin-bottom: 12px; }
.product-body p { font-size: 13.5px; color: var(--ink-soft); flex: 1; }
.product-body .more { font-size: 13.5px; font-weight: 700; margin-top: 14px; }

/* ---------- Product detail ---------- */
.page-hero { background: linear-gradient(120deg, var(--green-900), var(--green-700)); color: #fff; padding: 52px 0 56px; }
.page-hero .crumb { font-size: 13px; color: #bcd8cd; margin-bottom: 12px; }
.page-hero .crumb a { color: #dff0e8; }
.page-hero h1 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; }
.page-hero p { color: #d7e8e0; margin-top: 10px; max-width: 680px; }

.pd-layout { display: grid; grid-template-columns: 1fr 340px; gap: 40px; padding: 60px 0 72px; align-items: start; }
@media (max-width: 900px) { .pd-layout { grid-template-columns: 1fr; } }

.pd-panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; margin-bottom: 24px; }
.pd-panel h2 { font-size: 20px; color: var(--green-900); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--green-100); }
.pd-panel p { color: var(--ink-soft); font-size: 15px; margin-bottom: 12px; }

.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.spec-table th, .spec-table td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { width: 200px; color: var(--green-900); background: var(--green-50); font-weight: 700; }
.spec-table td { color: var(--ink-soft); }

.askside { background: var(--green-50); border: 1px solid var(--green-100); border-radius: var(--radius); padding: 26px; position: sticky; top: 92px; }
.askside h3 { color: var(--green-900); font-size: 18px; margin-bottom: 10px; }
.askside p { font-size: 14px; color: var(--ink-soft); margin-bottom: 16px; }
.askside .btn { width: 100%; text-align: center; margin-bottom: 10px; }
.askside .meta { font-size: 13px; color: var(--ink-soft); line-height: 1.9; margin-top: 14px; }
.askside .meta b { color: var(--green-900); }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: 12.5px; background: var(--green-100); color: var(--green-800); font-weight: 600; padding: 5px 12px; border-radius: 999px; }

/* ---------- Why us / feature list ---------- */
.feature-list { display: grid; gap: 18px; }
.feature { display: flex; gap: 16px; }
.feature .f-icon { flex: 0 0 44px; height: 44px; border-radius: 10px; background: var(--green-100); color: var(--green-800); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.feature h3 { font-size: 16.5px; color: var(--green-900); margin-bottom: 4px; }
.feature p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- CTA band ---------- */
.cta-band { background: linear-gradient(120deg, var(--green-800), var(--green-700)); color: #fff; padding: 64px 0; }
.cta-band .inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(22px, 3vw, 30px); margin-bottom: 8px; }
.cta-band p { color: #d7e8e0; max-width: 560px; }

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 860px) { .contact-layout { grid-template-columns: 1fr; } }
.contact-block { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; margin-bottom: 22px; }
.contact-block h3 { color: var(--green-900); font-size: 18px; margin-bottom: 14px; }
.contact-block .row { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 14.5px; }
.contact-block .row:last-child { border-bottom: none; }
.contact-block .row .k { width: 110px; flex: 0 0 110px; color: var(--green-800); font-weight: 700; }
.contact-block .row .v { color: var(--ink-soft); word-break: break-all; }

.form { display: grid; gap: 14px; }
.form label { font-size: 13.5px; font-weight: 700; color: var(--green-900); display: block; margin-bottom: 5px; }
.form input, .form select, .form textarea { width: 100%; padding: 11px 14px; border: 1.5px solid var(--line); border-radius: 8px; font-family: inherit; font-size: 14.5px; color: var(--ink); background: #fff; }
.form input:focus, .form textarea:focus, .form select:focus { outline: none; border-color: var(--green-700); }
.form textarea { min-height: 130px; resize: vertical; }
.form .hint { font-size: 12.5px; color: var(--ink-soft); }

/* ---------- Footer ---------- */
.site-footer { background: var(--green-900); color: #b9d4c9; padding: 56px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 36px; padding-bottom: 40px; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 14px; letter-spacing: .3px; }
.site-footer a { color: #b9d4c9; display: block; padding: 3px 0; font-size: 13.5px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; font-size: 12.5px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- Utility ---------- */
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.text-soft { color: var(--ink-soft); }
.center { text-align: center; }