:root {
  --qm-bg: #f5f8ff;
  --qm-surface: #ffffff;
  --qm-surface-soft: #eef3ff;
  --qm-text: #172036;
  --qm-text-muted: #4e5a78;
  --qm-line: #dce4f5;
  --qm-primary: #3563f6;
  --qm-primary-strong: #2246be;
  --qm-focus: #78a2ff;
  --qm-shadow: 0 12px 30px rgba(23, 32, 54, 0.08);
  --qm-shadow-soft: 0 8px 20px rgba(23, 32, 54, 0.05);
  --qm-radius: 18px;
  --qm-radius-sm: 12px;
  --qm-max: 76ch;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--qm-text);
  background:
    radial-gradient(circle at top right, rgba(53, 99, 246, 0.11), transparent 42%),
    linear-gradient(180deg, #f8faff 0%, #f5f8ff 40%, #edf3ff 100%);
}

h1, h2, h3 {
  font-family: "Plus Jakarta Sans", "Inter", "Segoe UI", sans-serif;
  letter-spacing: -0.02em;
  color: #0f172a;
}

p { margin: 0 0 1.15rem; }

a {
  color: var(--qm-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover { color: var(--qm-primary-strong); }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--qm-focus);
  outline-offset: 2px;
}

.qm_skip {
  position: absolute;
  left: -9999px;
}

.qm_skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  color: #fff;
  background: var(--qm-primary);
}

.qm_wrap {
  width: min(1140px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.qm_mast {
  width: min(1140px, calc(100% - 2.5rem));
  margin: 1.5rem auto 0;
  text-align: center;
  padding: 2rem 1.5rem 1.4rem;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--qm-line);
  border-radius: calc(var(--qm-radius) + 6px);
  backdrop-filter: blur(8px);
  box-shadow: var(--qm-shadow-soft);
}

.qm_brand {
  margin: 0 0 0.55rem;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--qm-text-muted);
  font-weight: 700;
}

.qm_logo {
  margin: 0;
  font-size: clamp(1.8rem, 2.9vw, 2.5rem);
  font-weight: 700;
}

.qm_tag {
  margin: 0.65rem auto 0;
  font-size: 0.99rem;
  color: var(--qm-text-muted);
}

.qm_nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  gap: 0.65rem;
  margin: 1.6rem 0 0;
  padding: 0;
}

.qm_nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.2rem;
  padding: 0.38rem 0.82rem;
  border-radius: 999px;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
  color: #2a3553;
  text-decoration: none;
  border: 1px solid transparent;
  transition: 150ms ease;
}

.qm_nav a:hover,
.qm_nav a[aria-current="page"] {
  border-color: #bfd0ff;
  color: var(--qm-primary-strong);
  background: rgba(53, 99, 246, 0.08);
}

main { padding-top: 2rem; }

.qm_hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 2.6rem;
  align-items: stretch;
}

@media (max-width: 900px) {
  .qm_hero { grid-template-columns: 1fr; }
}

.qm_hero > div,
.qm_hero_fig {
  background: var(--qm-surface);
  border: 1px solid var(--qm-line);
  border-radius: var(--qm-radius);
  box-shadow: var(--qm-shadow);
}

.qm_hero > div { padding: clamp(1.5rem, 3vw, 2.3rem); }

.qm_hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 3.8vw, 3.1rem);
  line-height: 1.12;
  max-width: 16ch;
}

.qm_hero_lede {
  color: var(--qm-text-muted);
  max-width: var(--qm-max);
}

.qm_hero_fig {
  margin: 0;
  padding: 1rem;
}

.qm_hero_fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--qm-radius-sm);
}

.qm_hero_cap {
  margin: 0.8rem 0 0;
  font-size: 0.78rem;
  color: #637198;
  line-height: 1.5;
}

.qm_rule {
  margin: 2.6rem 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #c8d6fb, transparent);
}

.qm_band {
  margin-bottom: 2rem;
  padding: clamp(1.45rem, 2.4vw, 2.2rem);
  border: 1px solid var(--qm-line);
  background: var(--qm-surface);
  border-radius: var(--qm-radius);
  box-shadow: var(--qm-shadow-soft);
}

.qm_band h2 {
  margin: 0 0 1.1rem;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  line-height: 1.25;
}

.qm_twocol {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.35rem, 2.2vw, 2rem);
}

@media (max-width: 860px) {
  .qm_twocol { grid-template-columns: 1fr; }
}

.qm_note {
  margin-top: 1.2rem;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  font-size: 0.94rem;
  color: #2d3b5f;
  border: 1px solid #ccdcff;
  background: linear-gradient(135deg, rgba(53, 99, 246, 0.1), rgba(53, 99, 246, 0.04));
}

.qm_split_img { margin: 1rem 0 0; }

.qm_split_img img {
  width: 100%;
  height: auto;
  border-radius: var(--qm-radius-sm);
  display: block;
}

.qm_three {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 2px minmax(0, 0.95fr);
  gap: 1.4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .qm_three { grid-template-columns: 1fr; }
}

.qm_vert {
  width: 2px;
  background: linear-gradient(180deg, transparent, #c9d8fc 18%, #c9d8fc 82%, transparent);
  min-height: 100%;
}

@media (max-width: 900px) {
  .qm_vert { display: none; }
}

footer.qm_ft {
  margin-top: 2.5rem;
  padding: 2.2rem 0 3rem;
  color: #394667;
}

.qm_ft .qm_wrap {
  padding: 1.35rem;
  border-radius: var(--qm-radius);
  border: 1px solid var(--qm-line);
  background: var(--qm-surface);
  box-shadow: var(--qm-shadow-soft);
}

.qm_ft_grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 1.6rem;
}

@media (max-width: 760px) {
  .qm_ft_grid { grid-template-columns: 1fr; }
}

.qm_ft p { margin: 0 0 0.85rem; }
.qm_ft strong { color: #0f172a; }

.qm_cookie {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(1040px, calc(100% - 1.5rem));
  display: none;
  z-index: 1000;
  background: #0f172a;
  color: #f3f7ff;
  border: 1px solid #263555;
  border-radius: 14px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.35);
}

.qm_cookie.qm_show { display: block; }

.qm_cookie_inner {
  padding: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.qm_cookie p {
  margin: 0;
  max-width: 70ch;
}

.qm_cookie a { color: #acc4ff; }

.qm_btns {
  display: flex;
  gap: 0.5rem;
}

.qm_btn {
  border: 1px solid #8ca8ee;
  background: transparent;
  color: #e4ecff;
  padding: 0.55rem 0.95rem;
  border-radius: 9px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

#qmCookieAccept {
  background: #3a69fa;
  border-color: #3a69fa;
  color: #fff;
}

.qm_btn:hover { background: rgba(255, 255, 255, 0.1); }

#qmCookieAccept:hover { background: #2f56cc; }

.qm_pagehead {
  margin-top: 0.5rem;
  padding: 1.5rem 1.35rem;
  background: var(--qm-surface);
  border: 1px solid var(--qm-line);
  border-radius: var(--qm-radius);
  box-shadow: var(--qm-shadow-soft);
}

.qm_pagehead h1 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  line-height: 1.2;
}

.qm_pagehead p {
  margin: 0;
  color: var(--qm-text-muted);
  max-width: 60ch;
}

.qm_article {
  margin: 1.25rem auto 0;
  padding: clamp(1.2rem, 2.3vw, 1.9rem);
  max-width: 820px;
  border: 1px solid var(--qm-line);
  border-radius: var(--qm-radius);
  background: var(--qm-surface);
  box-shadow: var(--qm-shadow-soft);
}

.qm_article figure { margin: 1.5rem 0; }

.qm_article img {
  width: 100%;
  height: auto;
  border-radius: var(--qm-radius-sm);
}

.qm_prose p:last-child { margin-bottom: 0; }

.qm_form label {
  display: block;
  margin-top: 1rem;
  color: #2a385a;
  font-size: 0.9rem;
  font-weight: 600;
}

.qm_form input,
.qm_form textarea {
  width: 100%;
  max-width: 560px;
  margin-top: 0.35rem;
  padding: 0.72rem 0.8rem;
  border-radius: 10px;
  border: 1px solid #c9d6f4;
  background: #f9fbff;
  color: var(--qm-text);
  font: inherit;
}

.qm_form textarea { min-height: 160px; resize: vertical; }

.qm_form button {
  margin-top: 1rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(180deg, #4472ff, #315ddc);
  color: #fff;
  padding: 0.7rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(53, 99, 246, 0.3);
}

.qm_form button:hover {
  background: linear-gradient(180deg, #355fd8, #294bb1);
}

.qm_blog_list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}

.qm_blog_list li {
  border: 1px solid var(--qm-line);
  background: var(--qm-surface-soft);
  border-radius: 12px;
  padding: 0.95rem 1rem;
  margin-bottom: 0.75rem;
}

.qm_blog_list a {
  color: #1b2a4f;
  font-size: 1.08rem;
  font-weight: 600;
  text-decoration: none;
}

.qm_blog_list a:hover { color: var(--qm-primary-strong); }

@media (max-width: 640px) {
  .qm_wrap,
  .qm_mast {
    width: calc(100% - 1.2rem);
  }

  .qm_mast { padding: 1.3rem 0.95rem 1rem; }
  .qm_nav { justify-content: center; gap: 0.45rem; }
  .qm_band { padding: 1.1rem; }
  .qm_cookie_inner { padding: 0.85rem; }
}