/* 银霖软件 · 跨境电商 ERP — corporate marketing site.
   Deep navy palette, hand-written CSS, no framework. */

:root {
  --navy-900: #0a2540;
  --navy-800: #10316b;
  --navy-700: #1a4480;
  --accent: #2f6bff;
  --accent-strong: #1f55dd;
  --gold: #c9a227;
  --bg: #ffffff;
  --bg-tinted: #f4f6fa;
  --surface: #ffffff;
  --text: #16273a;
  --muted: #55677c;
  --border: #dde4ee;
  --error: #b3261e;
  --radius: 10px;
  --shadow-card: 0 2px 12px rgba(10, 37, 64, 0.08);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3 {
  line-height: 1.3;
  color: var(--navy-900);
}

.yinlin-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.yinlin-shell main {
  flex: 1;
}

.section-inner {
  max-width: 1120px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-strong);
}

.btn--accent {
  background: var(--gold);
  color: var(--navy-900);
}

.btn--accent:hover {
  background: #d8b543;
}

.btn--ghost-light {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn--ghost-light:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn--ghost {
  border-color: var(--border);
  color: var(--navy-800);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--small {
  padding: 0.45rem 1.1rem;
  font-size: 0.875rem;
}

/* ---------- header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.site-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.site-header__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 8px;
  background: var(--navy-900);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}

.site-header__brand-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--navy-900);
}

.site-nav {
  flex: 1;
}

.site-nav__links {
  display: flex;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__link {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav__link:hover {
  color: var(--navy-900);
}

.site-nav__link[data-active="true"] {
  color: var(--accent);
  font-weight: 600;
  background: rgba(47, 107, 255, 0.08);
}

/* ---------- hero (home) ---------- */

.hero {
  background: linear-gradient(150deg, var(--navy-900) 0%, var(--navy-800) 60%, var(--navy-700) 100%);
  color: #fff;
  padding: 5.5rem 0 4.5rem;
}

.hero__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero__eyebrow {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  font-weight: 600;
}

.hero__title {
  margin: 0 0 1.2rem;
  font-size: 2.75rem;
  color: #fff;
}

.hero__subtitle {
  margin: 0 0 2rem;
  max-width: 620px;
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.82);
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- generic sections ---------- */

.section {
  padding: 4rem 0;
}

.section--tinted {
  background: var(--bg-tinted);
}

.section__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
}

.section__title {
  margin: 0 0 2rem;
  font-size: 1.8rem;
}

/* ---------- capability cards ---------- */

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.capability-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
}

.capability-card__title {
  margin: 0 0 0.6rem;
  font-size: 1.2rem;
}

.capability-card__summary {
  margin: 0 0 1rem;
  color: var(--muted);
}

.capability-card__points {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text);
}

.capability-card__points li + li {
  margin-top: 0.35rem;
}

/* ---------- comparison table ---------- */

.comparison-table {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.comparison-table__row {
  display: grid;
  grid-template-columns: 0.8fr 1.4fr 1.4fr;
}

.comparison-table__row + .comparison-table__row {
  border-top: 1px solid var(--border);
}

.comparison-table__row > div {
  padding: 1rem 1.25rem;
}

.comparison-table__row--head {
  background: var(--navy-900);
  color: #fff;
  font-weight: 600;
}

.comparison-table__aspect {
  font-weight: 600;
  color: var(--navy-800);
  background: var(--bg-tinted);
}

.comparison-table__before {
  color: var(--muted);
}

.comparison-table__after {
  color: var(--text);
  border-left: 1px solid var(--border);
}

/* ---------- CTA band ---------- */

.cta-band {
  background: var(--navy-900);
  color: #fff;
  text-align: center;
  padding: 3.5rem 0;
}

.cta-band__title {
  margin: 0 0 0.75rem;
  font-size: 1.7rem;
  color: #fff;
}

.cta-band__subtitle {
  margin: 0 0 1.5rem;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- page hero (inner pages) ---------- */

.page-hero {
  background: linear-gradient(150deg, var(--navy-900), var(--navy-800));
  color: #fff;
  padding: 3.5rem 0;
}

.page-hero .section__eyebrow {
  color: var(--gold);
}

.page-hero__title {
  margin: 0 0 0.75rem;
  font-size: 2.1rem;
  color: #fff;
}

.page-hero__subtitle {
  margin: 0;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.82);
}

/* ---------- product modules ---------- */

.module {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.module + .module {
  margin-top: 1.5rem;
}

.module__title {
  margin: 0 0 0.4rem;
  font-size: 1.35rem;
}

.module__summary {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.module__features {
  margin: 0;
  padding-left: 1.2rem;
  columns: 2;
  column-gap: 2.5rem;
}

.module__feature {
  break-inside: avoid;
  margin-bottom: 0.6rem;
}

/* ---------- solutions ---------- */

.scenario {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
}

.scenario + .scenario {
  margin-top: 1.75rem;
}

.scenario__audience {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--accent);
}

.scenario__title {
  margin: 0 0 0.75rem;
  font-size: 1.45rem;
}

.scenario__narrative {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 720px;
}

.scenario__steps {
  margin: 0;
  padding-left: 1.4rem;
}

.scenario__step + .scenario__step {
  margin-top: 1rem;
}

.scenario__step-title {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}

.scenario__step-detail {
  margin: 0;
  color: var(--muted);
}

/* ---------- about ---------- */

.about-mission__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.about-mission__item {
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  background: var(--surface);
}

.about-mission__item h3 {
  margin: 0 0 0.5rem;
}

.about-mission__item p {
  margin: 0;
  color: var(--muted);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.value-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.value-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.value-card__detail {
  margin: 0;
  color: var(--muted);
}

/* ---------- contact ---------- */

.contact-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.form-field + .form-field {
  margin-top: 1.1rem;
}

.form-field__label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  color: var(--navy-900);
  font-size: 0.95rem;
}

.form-field__required {
  color: var(--error);
}

.form-field__input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.form-field__input:focus {
  outline: 2px solid rgba(47, 107, 255, 0.35);
  border-color: var(--accent);
}

.contact-form__error {
  margin: 1rem 0 0;
  color: var(--error);
}

.contact-form__submit {
  margin-top: 1.5rem;
  border: none;
}

.contact-form__submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.contact-success {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.contact-success__title {
  margin: 0 0 0.5rem;
}

.contact-success__detail {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.contact-aside__title {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.contact-aside__channels {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-aside__channel {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1rem 1.25rem;
}

.contact-aside__channel + .contact-aside__channel {
  border-top: 1px solid var(--border);
}

.contact-aside__channel-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.contact-aside__channel-value {
  font-weight: 600;
  color: var(--navy-800);
}

/* ---------- not found / footer ---------- */

.yinlin-not-found {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-tinted);
  padding: 1.75rem 0;
}

.site-footer__brand {
  margin: 0;
  font-weight: 600;
  color: var(--navy-900);
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero {
    padding: 3.5rem 0 3rem;
  }

  .hero__title {
    font-size: 2rem;
  }

  .capability-grid,
  .value-grid,
  .about-mission__grid {
    grid-template-columns: 1fr;
  }

  .comparison-table__row {
    grid-template-columns: 1fr;
  }

  .comparison-table__row--head {
    display: none;
  }

  .comparison-table__after {
    border-left: none;
    background: var(--bg-tinted);
  }

  .module__features {
    columns: 1;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .site-nav {
    order: 3;
    width: 100%;
  }

  .site-nav__links {
    flex-wrap: wrap;
  }
}