/* ==========================================================================
   回炭环境 HuiTan Carbon — 主样式
   暖纸底 + 碳黑色块 · 颗粒点阵 · 再生绿点缀 · 印章元素
   ========================================================================== */

:root {
	--c-paper: #f5f1e8;
	--c-paper-2: #ece6d8;
	--c-ink: #16130f;
	--c-ink-2: #241f18;
	--c-text: #6b6152;
	--c-line: #ddd4c2;
	--c-green: #15803d;
	--c-green-bright: #22c55e;
	--radius: 14px;
	--radius-sm: 9px;
	--shadow: 0 12px 30px rgba(22, 19, 15, 0.10);
	--shadow-lg: 0 26px 60px rgba(22, 19, 15, 0.18);
	--font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
	--mono: "SF Mono", "Menlo", "Consolas", monospace;
	--grain: radial-gradient(rgba(22, 19, 15, 0.08) 1.2px, transparent 1.6px);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	font-family: var(--font);
	font-size: 16px;
	line-height: 1.8;
	color: var(--c-text);
	background: var(--c-paper);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-ink); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--c-green); }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.28; margin: 0 0 .5em; font-weight: 800; }
p { margin: 0 0 1em; }
::selection { background: var(--c-ink); color: var(--c-paper); }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	overflow: hidden; clip: rect(0 0 0 0);
	white-space: nowrap;
}
.skip-link:focus {
	position: fixed; left: 16px; top: 16px; z-index: 999;
	width: auto; height: auto; clip: auto;
	background: var(--c-ink); color: var(--c-paper);
	padding: 10px 18px; border-radius: 8px;
}
:focus-visible { outline: 2.5px solid var(--c-green); outline-offset: 2px; }

/* ---------- 按钮 ---------- */
.btn {
	display: inline-flex; align-items: center; gap: 8px;
	padding: 13px 28px;
	border-radius: var(--radius-sm);
	border: 2px solid var(--c-ink);
	font-size: 15px; font-weight: 700;
	cursor: pointer; white-space: nowrap;
	transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 rgba(22, 19, 15, .8); }
.btn--ink { background: var(--c-ink); color: var(--c-paper); }
.btn--ink:hover { color: #fff; }
.btn--line { background: transparent; color: var(--c-ink); }
.btn--line:hover { background: var(--c-ink); color: var(--c-paper); }
.btn--green { background: var(--c-green); border-color: var(--c-green); color: #fff; }
.btn--green:hover { color: #fff; box-shadow: 4px 4px 0 rgba(21, 128, 61, .5); }
.btn--sm { padding: 9px 18px; font-size: 14px; }
.btn--lg { padding: 15px 32px; font-size: 16px; }
.btn--block { width: 100%; justify-content: center; }
.ht-icon { flex-shrink: 0; }

/* ---------- 页头 ---------- */
.site-header {
	position: sticky; top: 0; z-index: 100;
	background: rgba(245, 241, 232, .93);
	backdrop-filter: blur(10px);
	border-bottom: 2px solid var(--c-ink);
}
.site-header__inner { display: flex; align-items: center; gap: 28px; min-height: 76px; }
.site-brand { margin-right: auto; }
.site-brand__link { display: flex; align-items: center; gap: 12px; }
.site-brand__mark {
	width: 46px; height: 46px; border-radius: 50%;
	display: grid; place-items: center; color: var(--c-paper);
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 7px 7px;
}
.site-brand__name { display: block; font-size: 21px; font-weight: 800; color: var(--c-ink); letter-spacing: .06em; }
.site-brand__slogan { display: block; font-size: 12px; color: var(--c-text); letter-spacing: .1em; }
.custom-logo { max-height: 50px; width: auto; }

.site-nav__list { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.site-nav__list li { position: relative; }
.site-nav__list a {
	display: block; padding: 9px 14px;
	color: var(--c-ink); font-weight: 700; font-size: 14.5px;
	border-radius: 8px;
}
.site-nav__list a:hover { background: var(--c-ink); color: var(--c-paper); }
.site-nav__list .sub-menu {
	position: absolute; top: 100%; left: 0; min-width: 190px;
	list-style: none; margin: 8px 0 0; padding: 8px;
	background: var(--c-paper); border: 2px solid var(--c-ink); border-radius: 10px;
	box-shadow: 6px 6px 0 rgba(22, 19, 15, .85);
	opacity: 0; visibility: hidden; transform: translateY(8px);
	transition: all .2s ease;
}
.site-nav__list li:hover > .sub-menu,
.site-nav__list li:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }

.site-header__actions { display: flex; align-items: center; gap: 14px; }
.nav-toggle {
	display: none; flex-direction: column; justify-content: center; gap: 5px;
	width: 44px; height: 44px; padding: 10px;
	background: none; border: 2px solid var(--c-ink); border-radius: 10px; cursor: pointer;
}
.nav-toggle span { display: block; height: 2.5px; background: var(--c-ink); border-radius: 2px; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
	position: relative;
	background-image: var(--grain);
	background-size: 22px 22px;
}
.hero__inner {
	display: grid; grid-template-columns: 1.04fr .96fr; gap: 52px; align-items: center;
	padding-top: 84px; padding-bottom: 92px;
}
.hero__eyebrow {
	display: inline-block;
	font-size: 13.5px; font-weight: 800; letter-spacing: .12em;
	color: var(--c-paper); background: var(--c-ink);
	padding: 7px 16px; border-radius: 6px;
}
.hero__title { font-size: clamp(36px, 4.8vw, 60px); font-weight: 900; margin: 24px 0 18px; }
.hero__title em {
	font-style: normal; color: var(--c-green);
	text-decoration: underline; text-decoration-thickness: 6px;
	text-decoration-color: rgba(34, 197, 94, .35); text-underline-offset: 8px;
}
.hero__desc { font-size: 16.5px; max-width: 31em; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0 36px; }
.hero__stats { list-style: none; display: flex; flex-wrap: wrap; gap: 14px 40px; margin: 0; padding: 0; }
.hero__stats li { display: flex; flex-direction: column; }
.hero__stats strong { font-family: var(--mono); font-size: 30px; font-weight: 800; color: var(--c-ink); }
.hero__stats span { font-size: 13px; }

/* 黑板卡 */
.slab {
	position: relative;
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 9px 9px;
	color: rgba(245, 241, 232, .78);
	border-radius: var(--radius);
	padding: 32px 34px;
	box-shadow: 10px 10px 0 rgba(22, 19, 15, .25);
}
.slab__title { display: flex; align-items: center; gap: 9px; font-size: 15px; font-weight: 800; color: var(--c-paper); margin-bottom: 20px; }
.slab__title .ht-icon { color: var(--c-green-bright); }
.slab__loop { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; counter-reset: loop; }
.slab__loop li {
	display: flex; align-items: baseline; gap: 14px;
	border-bottom: 1px dashed rgba(245, 241, 232, .25);
	padding-bottom: 11px; font-size: 14px;
}
.slab__loop b { color: var(--c-green-bright); font-family: var(--mono); font-size: 14px; white-space: nowrap; }
.slab__stamp {
	position: absolute; right: 22px; top: -26px;
	display: grid; place-items: center;
	width: 76px; height: 76px; border-radius: 50%;
	border: 3px solid var(--c-green);
	color: var(--c-green);
	font-size: 16px; font-weight: 900; line-height: 1.25; text-align: center;
	background: var(--c-paper);
	transform: rotate(12deg);
	box-shadow: var(--shadow);
}

/* ---------- 提醒条 ---------- */
.alertbar { background: var(--c-ink-2); color: rgba(245, 241, 232, .82); }
.alertbar__inner { display: flex; align-items: center; gap: 18px; padding: 16px 0; flex-wrap: wrap; }
.alertbar__inner > span {
	display: inline-flex; align-items: center; gap: 7px;
	font-size: 13px; font-weight: 800; color: var(--c-ink);
	background: #fbbf24; border-radius: 6px; padding: 5px 13px;
	flex-shrink: 0;
}
.alertbar p { margin: 0; font-size: 13.5px; }
.alertbar b { color: #fbbf24; }

/* ---------- 通用版块 ---------- */
.section { padding: 92px 0; }
.section--pad { padding: 64px 0 92px; }
.section--paper2 { background: var(--c-paper-2); }
.section--ink {
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 14px 14px;
	color: rgba(245, 241, 232, .72);
}
.section--ink h2, .section--ink h3 { color: var(--c-paper); }
.section-head { max-width: 660px; margin: 0 auto 52px; text-align: center; }
.section-head__eyebrow { font-size: 12.5px; font-weight: 800; letter-spacing: .3em; color: var(--c-green); margin-bottom: 11px; }
.section-head__title { font-size: clamp(26px, 3.2vw, 40px); margin-bottom: 14px; }
.section-head__desc { margin: 0; }
.section-foot { text-align: center; margin: 46px 0 0; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
	background: #fffdf8; border: 2px solid var(--c-ink); border-radius: var(--radius);
	overflow: hidden; display: flex; flex-direction: column;
	transition: transform .22s ease, box-shadow .22s ease;
}
.product-card:hover { transform: translate(-4px, -4px); box-shadow: 7px 7px 0 rgba(22, 19, 15, .85); }
.product-card__media {
	position: relative; display: block; aspect-ratio: 16 / 10;
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 8px 8px;
	border-bottom: 2px solid var(--c-ink);
	overflow: hidden;
}
.product-card__media img { width: 100%; height: 100%; object-fit: cover; }
.product-card__ph { position: absolute; inset: 0; display: grid; place-items: center; color: rgba(245, 241, 232, .85); }
.product-card__spec {
	position: absolute; left: 12px; bottom: 12px;
	font-family: var(--mono); font-size: 11.5px; font-weight: 700;
	color: var(--c-ink); background: var(--c-paper);
	padding: 4px 11px; border-radius: 6px;
}
.product-card__body { padding: 20px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.product-card__title { font-size: 17px; margin-bottom: 8px; }
.product-card__title a { color: var(--c-ink); }
.product-card__title a:hover { color: var(--c-green); }
.product-card__desc { font-size: 14px; flex: 1; margin-bottom: 14px; }
.product-card__more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 800; color: var(--c-green); transition: gap .2s ease; }
.product-card__more:hover { gap: 10px; }

/* ---------- 一吨炭的账 ---------- */
.account { display: grid; grid-template-columns: 1.02fr .98fr; gap: 60px; align-items: center; }
.account__copy .section-head__eyebrow { color: var(--c-green-bright); text-align: left; }
.account__copy .section-head__title { text-align: left; }
.account__points { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 20px; }
.account__points li { display: flex; gap: 14px; }
.account__points li > span {
	flex-shrink: 0; display: grid; place-items: center;
	width: 46px; height: 46px; border-radius: 10px;
	color: var(--c-green-bright);
	border: 1.5px solid rgba(34, 197, 94, .5);
	background: rgba(34, 197, 94, .08);
}
.account__points h3 { font-size: 16.5px; margin-bottom: 3px; }
.account__points p { font-size: 13.5px; margin: 0; color: rgba(245, 241, 232, .6); }

.account__panel {
	background: var(--c-paper); color: var(--c-text);
	border-radius: var(--radius);
	padding: 30px 32px;
	box-shadow: 12px 12px 0 rgba(34, 197, 94, .35);
}
.account__title { font-size: 15.5px; font-weight: 800; color: var(--c-ink); margin-bottom: 18px; }
.account__rows { display: grid; }
.account__rows > div {
	display: flex; justify-content: space-between; gap: 16px;
	padding: 13px 4px; border-bottom: 1px dashed var(--c-line);
	font-size: 14.5px;
}
.account__rows b { color: var(--c-ink); font-family: var(--mono); }
.account__rows .is-good b { color: var(--c-green); }
.account__rows .is-total { background: rgba(21, 128, 61, .1); border-radius: 8px; border-bottom: 0; margin-top: 6px; padding-left: 12px; padding-right: 12px; }
.account__rows .is-total b { color: var(--c-green); font-size: 17px; }
.account__note { font-size: 12.5px; color: #9c9080; margin: 14px 0 0; }

/* ---------- 场景 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.scene-card {
	background: #fffdf8; border: 2px solid var(--c-ink); border-radius: var(--radius);
	padding: 26px 26px 22px;
	transition: transform .22s ease, box-shadow .22s ease;
}
.scene-card:hover { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 rgba(22, 19, 15, .85); }
.scene-card__icon {
	display: inline-grid; place-items: center;
	width: 50px; height: 50px; border-radius: 50%;
	color: var(--c-paper); background: var(--c-ink);
	margin-bottom: 14px;
}
.scene-card h3 { font-size: 17px; margin-bottom: 6px; }
.scene-card p { font-size: 14px; margin: 0; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
	position: relative;
	background: #fffdf8; border: 2px solid var(--c-ink); border-radius: var(--radius);
	padding: 28px 26px 24px;
	transition: transform .22s ease, box-shadow .22s ease;
}
.case-card:hover { transform: translate(-4px, -4px); box-shadow: 7px 7px 0 rgba(22, 19, 15, .85); }
.case-card__seal {
	position: absolute; right: 18px; top: -20px;
	display: grid; place-items: center;
	width: 58px; height: 58px; border-radius: 50%;
	border: 2.5px solid var(--c-green); color: var(--c-green);
	font-size: 13px; font-weight: 900; line-height: 1.2; text-align: center;
	background: var(--c-paper);
	transform: rotate(10deg);
}
.case-card h3 { font-size: 17.5px; margin-bottom: 6px; padding-right: 48px; }
.case-card__meta { font-size: 13px; color: var(--c-green); font-weight: 800; margin-bottom: 10px; }
.case-card__desc { font-size: 14px; margin: 0; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
	background: #fffdf8; border: 2px solid var(--c-ink); border-radius: var(--radius);
	padding: 26px 26px 22px;
	transition: transform .22s ease, box-shadow .22s ease;
}
.news-card:hover { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 rgba(22, 19, 15, .85); }
.news-card__date { font-family: var(--mono); font-size: 12.5px; color: var(--c-green); font-weight: 700; margin-bottom: 10px; }
.news-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.news-card h3 a { color: var(--c-ink); }
.news-card__desc { font-size: 14px; }
.news-card__more { display: inline-flex; align-items: center; gap: 6px; font-size: 13.5px; font-weight: 800; color: var(--c-green); }

/* ---------- 联系 ---------- */
.contact { display: grid; grid-template-columns: 1fr 1.05fr; gap: 60px; align-items: center; }
.contact__copy .section-head__eyebrow { color: var(--c-green-bright); text-align: left; }
.contact__copy .section-head__title { text-align: left; }
.contact__list { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 16px; }
.contact__list li { display: flex; align-items: center; gap: 12px; font-size: 15px; color: rgba(245, 241, 232, .85); }
.contact__list .ht-icon { color: var(--c-green-bright); }

.contact__form-wrap {
	background: var(--c-paper); border-radius: var(--radius);
	padding: 34px;
	box-shadow: 12px 12px 0 rgba(34, 197, 94, .35);
}
.contact-form h3 { font-size: 20px; margin-bottom: 20px; }
.contact-form p { margin-bottom: 16px; }
.contact-form label { display: block; font-size: 14px; font-weight: 800; color: var(--c-ink); margin-bottom: 6px; }
.contact-form input[type="text"],
.contact-form input[type="tel"],
.contact-form textarea {
	width: 100%; padding: 12px 15px;
	border: 2px solid var(--c-ink); border-radius: var(--radius-sm);
	font-family: inherit; font-size: 15px; color: var(--c-ink);
	background: #fffdf8;
	transition: box-shadow .2s ease;
}
.contact-form input:focus, .contact-form textarea:focus {
	outline: none;
	box-shadow: 3px 3px 0 rgba(21, 128, 61, .6);
}
.contact-form__tip { font-size: 12.5px; color: #9c9080; text-align: center; margin: 12px 0 0; }
.hp-field { position: absolute !important; left: -9999px; }
.form-notice {
	background: rgba(21, 128, 61, .1); border: 2px solid var(--c-green); color: var(--c-green);
	border-radius: var(--radius-sm); padding: 13px 17px; margin-bottom: 18px; font-size: 14.5px; font-weight: 700;
}

/* ---------- 内页头部 ---------- */
.page-hero {
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 14px 14px;
	color: var(--c-paper); padding: 62px 0;
	border-bottom: 4px solid var(--c-green);
}
.page-hero__title { color: var(--c-paper); font-size: clamp(28px, 3.6vw, 42px); font-weight: 900; margin: 0; }
.page-hero__sub { color: rgba(245, 241, 232, .62); margin: 10px 0 0; }
.page-hero__meta { color: var(--c-green-bright); font-size: 14px; margin: 0 0 10px; }
.page-hero__meta a { color: var(--c-green-bright); }

/* ---------- 博客列表 ---------- */
.post-list { display: grid; gap: 22px; max-width: 860px; margin: 0 auto; }
.post-card {
	display: grid; grid-template-columns: 280px 1fr;
	background: #fffdf8; border: 2px solid var(--c-ink); border-radius: var(--radius);
	overflow: hidden; transition: transform .22s ease, box-shadow .22s ease;
}
.post-card:hover { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 rgba(22, 19, 15, .85); }
.post-card__thumb { border-right: 2px solid var(--c-ink); }
.post-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-card:not(:has(.post-card__thumb)) { grid-template-columns: 1fr; }
.post-card__body { padding: 24px 28px; }
.post-card__meta { font-family: var(--mono); font-size: 12.5px; color: var(--c-green); font-weight: 700; margin-bottom: 8px; }
.post-card__meta a { color: inherit; }
.post-card__title { font-size: 19px; margin-bottom: 8px; }
.post-card__title a { color: var(--c-ink); }
.post-card__desc { font-size: 14.5px; margin-bottom: 12px; }
.post-card__more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 800; color: var(--c-green); }
.no-results { text-align: center; padding: 60px 0; }

.navigation.pagination { margin: 46px 0 0; text-align: center; }
.nav-links { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }
.nav-links .page-numbers {
	display: inline-block; min-width: 42px; padding: 9px 14px;
	border: 2px solid var(--c-ink); border-radius: 8px;
	color: var(--c-ink); font-weight: 800; font-size: 14px; background: #fffdf8;
}
.nav-links .page-numbers.current,
.nav-links .page-numbers:hover { background: var(--c-ink); color: var(--c-paper); }

/* ---------- 文章内容 ---------- */
.entry-wrap { max-width: 860px; padding-top: 48px; padding-bottom: 92px; }
.entry__thumb { margin: 0 0 32px; border: 2px solid var(--c-ink); border-radius: var(--radius); overflow: hidden; }
.entry__content { font-size: 16.5px; }
.entry__content h2 { font-size: 26px; margin-top: 1.6em; }
.entry__content h3 { font-size: 21px; margin-top: 1.4em; }
.entry__content img { border-radius: var(--radius-sm); }
.entry__content blockquote {
	margin: 1.5em 0; padding: 16px 24px;
	border-left: 5px solid var(--c-green);
	background: #fffdf8; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
	color: var(--c-ink);
}
.entry__content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
.entry__content th, .entry__content td { border: 1.5px solid var(--c-line); padding: 10px 14px; text-align: left; }
.entry__content th { background: var(--c-paper-2); }
.entry__tags { margin-top: 28px; font-size: 14px; }
.page-links { margin: 24px 0; }

.post-nav {
	display: flex; justify-content: space-between; gap: 20px;
	margin: 44px 0; padding-top: 28px; border-top: 2px solid var(--c-ink);
	font-size: 14.5px;
}
.post-nav__next { text-align: right; }

/* ---------- 评论 ---------- */
.comments-area { margin-top: 48px; }
.comments-title, .comment-reply-title { font-size: 21px; }
.comment-list { list-style: none; margin: 0 0 30px; padding: 0; }
.comment-list .comment { border-bottom: 1px dashed var(--c-line); padding: 20px 0; }
.comment-list .children { list-style: none; padding-left: 40px; }
.comment-author { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--c-ink); }
.comment-author .avatar { border-radius: 50%; border: 2px solid var(--c-ink); }
.comment-metadata { font-size: 12.5px; }
.comment-content { font-size: 15px; }
.reply { font-size: 13.5px; }
.comment-form input[type="text"], .comment-form input[type="email"], .comment-form input[type="url"], .comment-form textarea {
	width: 100%; padding: 11px 14px;
	border: 2px solid var(--c-ink); border-radius: var(--radius-sm);
	font-family: inherit; font-size: 15px; background: #fffdf8;
}
.comment-form input:focus, .comment-form textarea:focus { outline: none; box-shadow: 3px 3px 0 rgba(21, 128, 61, .5); }
.form-submit .submit {
	background: var(--c-ink); color: var(--c-paper); border: 2px solid var(--c-ink);
	border-radius: var(--radius-sm); padding: 12px 30px;
	font-size: 15px; font-weight: 800; cursor: pointer;
}

/* ---------- 搜索 / 404 ---------- */
.search-form { display: flex; gap: 10px; max-width: 480px; }
.search-form__input {
	flex: 1; padding: 12px 16px;
	border: 2px solid var(--c-ink); border-radius: var(--radius-sm);
	font-family: inherit; font-size: 15px; background: #fffdf8;
}
.search-form__input:focus { outline: none; box-shadow: 3px 3px 0 rgba(21, 128, 61, .5); }
.error-404 { text-align: center; padding: 40px 0; }
.error-404__code {
	font-family: var(--mono);
	font-size: clamp(90px, 16vw, 160px); font-weight: 800; line-height: 1;
	color: var(--c-ink);
	text-shadow: 6px 6px 0 rgba(34, 197, 94, .4);
	margin: 0 0 10px;
}
.error-404 .search-form { margin: 24px auto 28px; justify-content: center; }

/* ---------- 产品详情 / 归档 ---------- */
.product-single { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-top: 56px; padding-bottom: 40px; align-items: start; }
.product-single__media {
	position: relative; border: 2px solid var(--c-ink); border-radius: var(--radius); overflow: hidden;
	aspect-ratio: 4 / 3;
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 9px 9px;
	box-shadow: 10px 10px 0 rgba(22, 19, 15, .25);
}
.product-single__media img { width: 100%; height: 100%; object-fit: cover; }
.product-single__ph { position: absolute; inset: 0; display: grid; place-items: center; color: rgba(245, 241, 232, .85); }
.product-single__summary {
	background: #fffdf8; border: 2px solid var(--c-ink);
	border-radius: var(--radius-sm); padding: 16px 20px; margin-bottom: 24px;
	font-size: 15px; color: var(--c-ink);
}
.product-single__summary p { margin: 0; }
.product-single__cta {
	margin-top: 32px; padding: 26px 28px;
	border: 2.5px dashed var(--c-green); border-radius: var(--radius);
	background: rgba(34, 197, 94, .06);
}
.product-single__cta h3 { font-size: 17px; margin-bottom: 6px; }
.product-single__cta p { font-size: 14px; margin-bottom: 16px; }
.product-single__cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.related-title { font-size: 23px; margin-bottom: 26px; }
.archive-cta {
	margin-top: 64px; text-align: center;
	background: #fffdf8; border: 2px solid var(--c-ink);
	border-radius: var(--radius); padding: 48px 32px;
	box-shadow: 8px 8px 0 rgba(22, 19, 15, .2);
}
.archive-cta h2 { font-size: 24px; }
.archive-cta p { margin-bottom: 20px; }

/* ---------- 页脚 ---------- */
.site-footer {
	background: var(--c-ink);
	background-image: var(--grain);
	background-size: 12px 12px;
	color: rgba(245, 241, 232, .68);
	border-top: 4px solid var(--c-green);
}
.site-footer__grid {
	display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px;
	padding-top: 62px; padding-bottom: 46px;
}
.site-footer__logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: var(--c-paper); margin-bottom: 14px; }
.site-footer__logo .ht-icon { color: var(--c-green-bright); }
.site-footer__about { font-size: 14px; line-height: 1.85; }
.site-footer__phone { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 20px; font-weight: 800; color: var(--c-green-bright); margin-top: 18px; }
.site-footer__title { color: var(--c-paper); font-size: 15.5px; margin-bottom: 18px; }
.site-footer__menu { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer__menu a { color: rgba(245, 241, 232, .68); font-size: 14px; }
.site-footer__menu a:hover { color: var(--c-green-bright); }
.site-footer__contact { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; font-size: 14px; }
.site-footer__contact li { display: flex; gap: 9px; align-items: flex-start; }
.site-footer__contact .ht-icon { color: var(--c-green-bright); margin-top: 4px; }
.site-footer__bottom { border-top: 1px dashed rgba(245, 241, 232, .3); }
.site-footer__bottom-inner {
	display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
	padding-top: 20px; padding-bottom: 20px; font-size: 13px;
}
.site-footer__bottom p { margin: 0; }

/* ---------- 返回顶部 ---------- */
.back-to-top {
	position: fixed; right: 26px; bottom: 26px; z-index: 90;
	width: 48px; height: 48px; border: 2px solid var(--c-ink); border-radius: 50%;
	display: grid; place-items: center; cursor: pointer;
	background: var(--c-paper); color: var(--c-ink);
	box-shadow: 5px 5px 0 rgba(22, 19, 15, .8);
	opacity: 0; visibility: hidden; transform: translateY(12px);
	transition: all .25s ease;
}
.back-to-top .ht-icon { transform: rotate(-90deg); }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	.reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
	.hero__inner { grid-template-columns: 1fr; }
	.product-grid, .scene-grid, .case-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
	.account { grid-template-columns: 1fr; gap: 44px; }
	.contact { grid-template-columns: 1fr; gap: 44px; }
	.site-footer__grid { grid-template-columns: 1fr 1fr; }
	.product-single { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
	.nav-toggle { display: flex; }
	.site-header__actions .btn { display: none; }
	.site-nav {
		position: fixed; top: 0; right: 0; bottom: 0; z-index: 200;
		width: min(320px, 84vw);
		background: var(--c-paper); border-left: 2px solid var(--c-ink);
		padding: 84px 28px 28px;
		transform: translateX(100%); transition: transform .3s ease;
		overflow-y: auto;
	}
	.site-nav.is-open { transform: translateX(0); box-shadow: -18px 0 50px rgba(22, 19, 15, .3); }
	.site-nav__list { flex-direction: column; gap: 4px; }
	.site-nav__list a { padding: 13px 14px; font-size: 16px; }
	.site-nav__list .sub-menu {
		position: static; opacity: 1; visibility: visible; transform: none;
		box-shadow: none; border: 0; padding: 0 0 0 18px; margin: 0; background: transparent;
	}
	.nav-toggle { position: relative; z-index: 210; }
	body.nav-open { overflow: hidden; }
}

@media (max-width: 620px) {
	.section { padding: 64px 0; }
	.product-grid, .scene-grid, .case-grid, .news-grid { grid-template-columns: 1fr; }
	.post-card { grid-template-columns: 1fr; }
	.post-card__thumb { border-right: 0; border-bottom: 2px solid var(--c-ink); aspect-ratio: 16 / 9; overflow: hidden; }
	.site-footer__grid { grid-template-columns: 1fr; gap: 32px; }
	.contact__form-wrap { padding: 26px 22px; }
	.slab { padding: 24px 22px; }
	.slab__stamp { width: 64px; height: 64px; font-size: 14px; }
}

/* 优化 · 全局尊重系统"减少动态效果"（覆盖装饰性 keyframes 动画） */
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}}

/* ==========================================================================
   美化优化 v1.1 · 2026-07 — 纸墨炭颗粒风精修(手作感)
   ========================================================================== */
/* 通用 UX */
html { scroll-padding-top: 88px; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

/* 按钮:硬投影语言的按压 */
.btn:active { transform: translate(1px, 1px); }

/* 标题下划线:悬停加粗(像再描一笔) */
.hero__title em { transition: text-decoration-color .3s ease, text-decoration-thickness .3s ease; }
.hero__title:hover em { text-decoration-color: rgba(34, 197, 94, .6); text-decoration-thickness: 8px; }

/* 导航:当前项绿字 */
.site-nav__list > li.current-menu-item > a { color: var(--c-green); }

/* 图章:悬停盖章按压感 */
.slab__stamp { transition: transform .18s ease; }
.slab:hover .slab__stamp { transform: rotate(8deg) scale(.94); }
.case-card__seal { transition: transform .18s ease; }
.case-card:hover .case-card__seal { transform: rotate(6deg) scale(.94); }

/* 黑板卡:行悬停粉笔更亮 */
.slab__loop li { transition: border-color .25s ease; }
.slab__loop li:hover { border-bottom-color: rgba(34, 197, 94, .5); }
.slab__loop li:hover b { color: #4ade80; }
.slab__loop b { transition: color .25s ease; }

/* 提醒条:标签轻晃(引起注意但不吵) */
.alertbar__inner > span { transition: transform .2s ease; }
.alertbar__inner:hover > span { transform: rotate(-2deg); }

/* 产品卡:图区微缩放 + 规格签描边 */
.product-card__media img, .product-card__ph { transition: transform .4s ease; }
.product-card:hover .product-card__media img,
.product-card:hover .product-card__ph { transform: scale(1.04); }
.product-card__spec { transition: box-shadow .22s ease; }
.product-card:hover .product-card__spec { box-shadow: 2px 2px 0 rgba(22, 19, 15, .8); }

/* 一吨炭的账:绿影加深 + 图标点亮 */
.account__panel { transition: box-shadow .25s ease, transform .25s ease; }
.account__panel:hover { transform: translate(-2px, -2px); box-shadow: 14px 14px 0 rgba(34, 197, 94, .45); }
.account__rows > div { transition: border-color .25s ease; }
.account__rows > div:hover { border-bottom-color: rgba(21, 128, 61, .4); }
.account__points li > span { transition: background .25s ease, box-shadow .25s ease; }
.account__points li:hover > span { background: rgba(34, 197, 94, .16); box-shadow: 3px 3px 0 rgba(34, 197, 94, .35); }

/* 场景:墨圆图标翻绿 */
.scene-card__icon { transition: background .25s ease; }
.scene-card:hover .scene-card__icon { background: var(--c-green); }

/* 表单:聚焦墨色描边 + 硬影 */
.contact-form input:focus, .contact-form textarea:focus { box-shadow: 3px 3px 0 rgba(21, 128, 61, .5); }

/* 页脚:链接滑入 + 绿点 */
.site-footer__menu a { transition: color .2s ease, padding-left .2s ease; }
.site-footer__menu a:hover { color: var(--c-green-bright); padding-left: 6px; }

/* 减动效:无常驻动画,仅交互过渡,天然合规 */