* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; line-height: 1.62; letter-spacing: 0; }
a { color: inherit; }
img { max-width: 100%; display: block; }
.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px 6vw; backdrop-filter: blur(14px); }
.brand { display: inline-flex; gap: 12px; align-items: center; text-decoration: none; min-width: 210px; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 8px; font-weight: 800; overflow: hidden; }
.brand-mark img { width: 30px; height: 30px; display: block; }
.brand strong, .brand small { display: block; }
.brand small { font-size: 0.78rem; opacity: .72; }
.main-nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 0.94rem; }
.main-nav a { text-decoration: none; padding: 8px 0; }
.hero { min-height: 560px; display: grid; align-items: center; padding: 70px 6vw; background-image: linear-gradient(90deg, rgba(0,0,0,.72), rgba(0,0,0,.22), rgba(255,255,255,.08)), url('hero.png'); background-size: cover; background-position: center; }
.hero-copy { max-width: 760px; color: #fff; text-shadow: 0 1px 20px rgba(0,0,0,.28); }
.hero h1 { margin: 10px 0 18px; font-size: 3rem; line-height: 1.08; letter-spacing: 0; }
.hero p { max-width: 660px; font-size: 1.16rem; }
.eyebrow { display: inline-block; font-size: .78rem; text-transform: uppercase; font-weight: 800; letter-spacing: 0; }
.section { padding: 54px 6vw; }
.section-head { max-width: 780px; margin-bottom: 24px; }
.section h2 { margin: 8px 0 0; font-size: 2rem; line-height: 1.2; letter-spacing: 0; }
.intro-section p { max-width: 900px; font-size: 1.08rem; }
.category-grid, .article-grid, .related-grid { display: grid; gap: 18px; }
.category-grid { grid-template-columns: repeat(5, minmax(120px, 1fr)); }
.category-grid a, .article-card, .related-card, .tool-list li, .popular-list a { border-radius: 8px; text-decoration: none; }
.category-grid a { padding: 18px; font-weight: 800; }
.search-box { display: grid; gap: 8px; max-width: 680px; font-weight: 700; }
.search-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
.search-box input { width: 100%; border: 1px solid currentColor; border-radius: 8px; padding: 16px; font-size: 1rem; background: transparent; color: inherit; }
.search-box button { border: 0; border-radius: 8px; padding: 0 22px; min-height: 54px; font-weight: 800; cursor: pointer; }
.article-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.article-card { padding: 22px; border: 1px solid transparent; min-height: 245px; }
.article-card span, .related-card span { font-size: .8rem; font-weight: 800; text-transform: uppercase; }
.article-card h3 { margin: 10px 0; font-size: 1.2rem; line-height: 1.28; letter-spacing: 0; }
.article-card a { text-decoration: none; }
.article-card p { margin: 0; }
.popular-list { display: grid; gap: 12px; max-width: 920px; }
.popular-list a { display: grid; grid-template-columns: 42px 1fr; gap: 14px; align-items: center; padding: 14px 18px; }
.tool-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.tool-list li { padding: 18px; font-weight: 700; }
.tool-links { display: flex; gap: 14px; flex-wrap: wrap; }
.tool-links a, .button, .ghost-button { display: inline-flex; align-items: center; min-height: 44px; border-radius: 8px; padding: 12px 16px; text-decoration: none; font-weight: 800; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; padding: 42px 6vw 70px; }
.article-page { max-width: 860px; }
.breadcrumbs { display: flex; gap: 10px; flex-wrap: wrap; font-size: .9rem; margin-bottom: 28px; }
.breadcrumbs a { text-decoration: none; }
.article-hero { padding-bottom: 28px; border-bottom: 1px solid currentColor; }
.article-hero h1 { margin: 10px 0 14px; font-size: 2.55rem; line-height: 1.12; letter-spacing: 0; }
.article-hero p { font-size: 1.08rem; }
.lead { font-size: 1.16rem; font-weight: 700; margin-top: 32px; }
.article-section, .faq, .related, .tool-callout { margin-top: 42px; }
.article-section h2, .faq h2, .related h2, .tool-callout h2, .article-aside h2 { font-size: 1.65rem; line-height: 1.25; margin: 0 0 14px; letter-spacing: 0; }
.article-section h3, .faq h3 { font-size: 1.16rem; margin: 26px 0 8px; letter-spacing: 0; }
.article-section ul, .article-section ol { padding-left: 24px; }
.article-section li { margin: 8px 0; }
blockquote { margin: 22px 0; padding: 18px 20px; border-left: 4px solid currentColor; font-weight: 700; }
.tool-callout { padding: 24px; border-radius: 8px; }
.related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.related-card { display: grid; gap: 8px; padding: 18px; }
.related-card strong { line-height: 1.28; }
.related-card small { opacity: .78; }
.article-aside { position: sticky; top: 92px; align-self: start; display: grid; gap: 12px; padding: 20px; border-radius: 8px; }
.article-aside a { text-decoration: none; padding-bottom: 10px; border-bottom: 1px solid currentColor; }
.data-table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: .96rem; }
.data-table th, .data-table td { text-align: left; padding: 12px; border-bottom: 1px solid currentColor; vertical-align: top; }
.site-footer { display: flex; justify-content: space-between; gap: 24px; padding: 34px 6vw; }
.site-footer p { max-width: 720px; }
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; align-items: start; }
.is-hidden { display: none !important; }
@media (max-width: 980px) {
  .site-header, .site-footer { align-items: flex-start; flex-direction: column; }
  .hero { min-height: 480px; }
  .hero h1 { font-size: 2.2rem; }
  .category-grid, .article-grid, .tool-list, .related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: 1fr; }
  .article-aside { position: static; }
}
@media (max-width: 640px) {
  .section, .article-layout, .site-header, .site-footer, .hero { padding-left: 20px; padding-right: 20px; }
  .hero { min-height: 430px; align-items: end; }
  .hero h1 { font-size: 1.85rem; }
  .section h2, .article-hero h1 { font-size: 1.72rem; }
  .category-grid, .article-grid, .tool-list, .related-grid { grid-template-columns: 1fr; }
  .search-row { grid-template-columns: 1fr; }
  .search-box button { width: 100%; }
  .main-nav { gap: 10px; }
}

body { color: #1f2a2e; background: #f7fbfb; }
.site-header { background: rgba(247,251,251,.9); border-bottom: 1px solid #dbe8e8; }
.brand-mark { background: #18b7bd; color: #ffffff; }
.hero { background-image: linear-gradient(90deg, rgba(20,47,52,.74), rgba(20,47,52,.18), rgba(247,251,251,.12)), url('hero.png'); }
.button { background: #18b7bd; color: #ffffff; }
.ghost-button { border: 1px solid rgba(255,255,255,.72); color: #ffffff; }
.section:nth-of-type(even) { background: #ffffff; }
.eyebrow { color: #0b8b91; }
.category-grid a { background: #e7fbfb; border: 1px solid #b7e4e5; color: #10565b; }
.article-card, .related-card, .tool-list li, .popular-list a, .article-aside { background: #ffffff; border: 1px solid #d7e6e6; box-shadow: 0 8px 22px rgba(19,83,90,.06); }
.article-card span, .related-card span { color: #d47a16; }
.article-card:hover, .popular-list a:hover, .category-grid a:hover { border-color: #18b7bd; }
.search-box input { border-color: #9ccfd0; background: #fff; }
.search-box button { background: #18b7bd; color: #fff; }
.tool-callout { background: #e7fbfb; border: 1px solid #18b7bd; }
.tool-callout a, .footer-links a { color: #0b8b91; }
.tools-recommend { background: #143035; color: #ffffff; }
.tool-links a { background: #ffffff; color: #143035; }
.site-footer { background: #143035; color: #ffffff; }

body {
  background:
    linear-gradient(90deg, rgba(24,183,189,.07) 1px, transparent 1px) 0 0 / 34px 34px,
    linear-gradient(rgba(24,183,189,.05) 1px, transparent 1px) 0 0 / 34px 34px,
    #f7fbfb;
}
.site-header { box-shadow: 0 12px 32px rgba(19,83,90,.08); }
.brand-mark { box-shadow: inset 0 -10px 18px rgba(0,0,0,.14); }
.main-nav a { border-bottom: 2px solid transparent; }
.main-nav a:hover { border-color: #18b7bd; color: #0b8b91; }
.hero { border-bottom: 8px solid #18b7bd; position: relative; isolation: isolate; }
.hero::after { content: ""; position: absolute; inset: auto 6vw 38px auto; width: min(330px, 28vw); height: 150px; border-radius: 8px; background: rgba(255,255,255,.78); border: 1px solid rgba(255,255,255,.7); box-shadow: 0 22px 60px rgba(20,47,52,.24); z-index: -1; }
.hero-copy { padding: 10px 0 20px; }
.hero h1 { max-width: 760px; }
.section { position: relative; }
.intro-section { background: linear-gradient(135deg, #ffffff 0%, #edfafa 100%); }
.category-grid a { min-height: 96px; display: flex; align-items: end; position: relative; overflow: hidden; }
.category-grid a::before { content: ""; position: absolute; top: 16px; left: 16px; width: 34px; height: 22px; border-radius: 4px; background: #ffffff; border: 2px solid #18b7bd; box-shadow: 44px 0 0 -8px #d47a16; }
.article-card { position: relative; overflow: hidden; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.article-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px; background: linear-gradient(90deg, #18b7bd, #d47a16); }
.article-card:hover { transform: translateY(-4px); box-shadow: 0 16px 38px rgba(19,83,90,.12); }
.popular-list a b { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 8px; background: #18b7bd; color: #fff; }
.tool-list li { min-height: 118px; display: flex; align-items: end; border-style: dashed; background: linear-gradient(180deg, #ffffff, #edfbfb); }
.tools-recommend { background: linear-gradient(135deg, #143035, #0b5257); }
.article-layout { background: linear-gradient(180deg, #f7fbfb, #ffffff 280px); }
.article-hero { background: #ffffff; border: 1px solid #d7e6e6; border-top: 5px solid #18b7bd; border-radius: 8px; padding: 28px; box-shadow: 0 16px 38px rgba(19,83,90,.08); }
.article-section { background: #ffffff; border: 1px solid #d7e6e6; border-radius: 8px; padding: 26px; box-shadow: 0 10px 26px rgba(19,83,90,.05); }
.article-section li::marker { color: #0b8b91; font-weight: 800; }
.faq { background: #edfafa; border-radius: 8px; padding: 26px; border: 1px solid #b7e4e5; }
.related-card:hover { border-color: #18b7bd; transform: translateY(-2px); }
.search-section h1 { margin: 8px 0 0; font-size: 2.4rem; line-height: 1.15; }
@media (max-width: 640px) {
  .hero::after { display: none; }
  .article-hero, .article-section, .faq { padding: 20px; }
}