:root {
  --ink: #111827;
  --muted: #667085;
  --navy: #07152f;
  --navy-soft: #102241;
  --line: #d9e2ef;
  --surface: #ffffff;
  --surface-soft: #f5f8fc;
  --teal: #17b8b3;
  --teal-dark: #087c80;
  --gold: #c99a3f;
  --coral: #e15f4f;
  --shadow: 0 24px 70px rgba(12, 28, 54, 0.14);
  --radius: 8px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", Arial, sans-serif;
  line-height: 1.6;
  word-break: keep-all;
}

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

button,
input,
textarea {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 76px;
  padding: 16px clamp(20px, 4vw, 56px);
  color: #fff;
  transition: background 180ms ease, box-shadow 180ms ease, min-height 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  min-height: 68px;
  background: rgba(7, 21, 47, 0.92);
  box-shadow: 0 16px 50px rgba(1, 9, 24, 0.22);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  font-weight: 900;
  letter-spacing: 0;
  font-size: 1.25rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  aspect-ratio: 1;
  border-radius: 8px;
  color: #06162e;
  background: linear-gradient(145deg, #ffffff, #84eee6);
  box-shadow: inset 0 -7px 14px rgba(8, 124, 128, 0.18);
  font-weight: 950;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2vw, 34px);
  flex: 1;
  font-size: 0.96rem;
  font-weight: 750;
}

.site-nav a {
  opacity: 0.84;
  transition: opacity 160ms ease, color 160ms ease;
}

.site-nav a:hover {
  color: #95f2eb;
  opacity: 1;
}

.header-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 850;
  letter-spacing: 0;
  white-space: nowrap;
}

.header-cta {
  min-height: 44px;
  padding: 0 18px;
  background: #eefcff;
  color: #092139;
  box-shadow: 0 12px 28px rgba(23, 184, 179, 0.22);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: min(860px, 86svh);
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}

.hero-bg,
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-bg {
  background-image: url("./assets/onetop-hero.png");
  background-size: cover;
  background-position: center right;
  transform: scale(1.02);
}

.hero-overlay {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(4, 14, 33, 0.98) 0%, rgba(5, 18, 39, 0.88) 36%, rgba(5, 17, 38, 0.52) 67%, rgba(5, 17, 38, 0.32) 100%),
    linear-gradient(180deg, rgba(3, 8, 20, 0.3) 0%, rgba(3, 8, 20, 0.06) 58%, rgba(245, 248, 252, 0.98) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 104px;
  background: linear-gradient(176deg, transparent 0 42%, var(--surface-soft) 43% 100%);
  z-index: -1;
}

.hero-inner {
  padding: 142px 0 136px;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 0.8rem;
  font-weight: 950;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(5rem, 13vw, 9.6rem);
  line-height: 0.92;
  font-weight: 950;
  letter-spacing: 0;
  text-shadow: 0 20px 70px rgba(0, 0, 0, 0.38);
}

.hero-lead {
  width: min(100%, 620px);
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1.1rem, 2.1vw, 1.45rem);
  font-weight: 650;
}

.meeting-callout {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  margin: 22px 0 0;
  padding: 10px 14px;
  border: 1px solid rgba(201, 154, 63, 0.45);
  border-radius: 12px;
  color: #f3d38a;
  background: rgba(201, 154, 63, 0.14);
  font-size: 0.92rem;
  font-weight: 850;
  white-space: normal;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.btn {
  min-height: 52px;
  padding: 0 22px;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--teal);
  color: #04152a;
  box-shadow: 0 14px 34px rgba(23, 184, 179, 0.28);
}

.btn-primary:hover {
  background: #47d7d1;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: #fff;
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(8px);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.trust-row span {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
  font-weight: 750;
}

.proof-strip {
  position: relative;
  z-index: 2;
  padding: 0 0 54px;
  background: var(--surface-soft);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.proof-grid article {
  min-height: 132px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 26px;
  background: #fff;
}

.proof-grid strong {
  color: var(--navy);
  font-size: clamp(1.9rem, 3vw, 2.75rem);
  line-height: 1;
  font-weight: 950;
}

.proof-grid span {
  color: var(--muted);
  font-weight: 750;
}

.section {
  padding: clamp(74px, 9vw, 118px) 0;
}

.intro {
  background: #fff;
}

.intro-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(34px, 7vw, 92px);
  align-items: end;
}

h2,
h3,
p {
  letter-spacing: 0;
}

h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.16;
  font-weight: 930;
}

h3 {
  margin: 0;
  color: var(--navy);
  font-size: 1.15rem;
  line-height: 1.35;
  font-weight: 900;
}

.intro-grid > p,
.security-panel p,
.contact-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  font-weight: 620;
}

.pain-section {
  padding-top: 0;
  background: #fff;
}

.card-grid {
  display: grid;
  gap: 18px;
}

.card-grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.issue-card,
.product-card,
.case-card,
.process-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.issue-card {
  padding: 28px;
  min-height: 244px;
  display: grid;
  align-content: start;
  gap: 16px;
  box-shadow: 0 18px 50px rgba(12, 28, 54, 0.07);
}

.issue-card p,
.product-card p,
.case-card p,
.process-grid p {
  margin: 0;
  color: var(--muted);
  font-weight: 590;
}

.card-icon {
  width: 42px;
  aspect-ratio: 1;
  border-radius: var(--radius);
  background: #e8fbfa;
  position: relative;
}

.shield-icon::before {
  content: "";
  position: absolute;
  inset: 9px 12px 10px;
  border: 3px solid var(--teal-dark);
  border-top-width: 5px;
  border-radius: 16px 16px 18px 18px;
  transform: perspective(20px) rotateX(8deg);
}

.wallet-icon::before {
  content: "";
  position: absolute;
  inset: 13px 9px;
  border: 3px solid var(--gold);
  border-radius: 5px;
}

.wallet-icon::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
}

.signal-icon::before {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  height: 22px;
  background:
    linear-gradient(var(--coral), var(--coral)) left bottom / 5px 11px no-repeat,
    linear-gradient(var(--coral), var(--coral)) center bottom / 5px 17px no-repeat,
    linear-gradient(var(--coral), var(--coral)) right bottom / 5px 22px no-repeat;
  border-radius: 3px;
}

.solution-section {
  color: #fff;
  background:
    radial-gradient(circle at 18% 12%, rgba(23, 184, 179, 0.18), transparent 26%),
    linear-gradient(135deg, #07152f 0%, #102241 58%, #132b28 100%);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-heading.compact {
  margin-bottom: 0;
}

.solution-section h2,
.solution-section h3 {
  color: #fff;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.process-grid article {
  min-height: 260px;
  padding: 26px;
  display: grid;
  align-content: start;
  gap: 16px;
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}

.process-grid span {
  color: #8cece5;
  font-size: 0.86rem;
  font-weight: 950;
}

.process-grid p {
  color: rgba(255, 255, 255, 0.72);
}

.product-section {
  background: #f5f8fc;
}

.product-layout {
  display: grid;
  grid-template-columns: 0.38fr 0.62fr;
  gap: clamp(30px, 5vw, 72px);
  align-items: start;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.product-card {
  min-height: 174px;
  padding: 24px;
  display: grid;
  align-content: start;
  gap: 12px;
  box-shadow: 0 16px 42px rgba(12, 28, 54, 0.06);
}

.product-card::before {
  content: "";
  width: 32px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--teal), var(--gold));
}

.preview-section {
  background: #050d1d;
  color: #fff;
}

.preview-section h2 {
  color: #fff;
}

.preview-section .section-heading p:last-child {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 590;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.preview-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: #0b1628;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

.preview-card img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  object-position: top center;
  background: #111;
}

.preview-card figcaption {
  display: grid;
  gap: 6px;
  padding: 16px 18px 18px;
}

.preview-card strong {
  font-size: 1.02rem;
}

.preview-card span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
  font-weight: 560;
}

.preview-card.featured {
  border-color: rgba(23, 184, 179, 0.4);
}

.security-section {
  background: #fff;
}

.security-panel {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
  padding: clamp(34px, 5vw, 58px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.95), rgba(245, 248, 252, 0.96)),
    linear-gradient(135deg, rgba(23, 184, 179, 0.18), rgba(201, 154, 63, 0.12));
  box-shadow: var(--shadow);
}

.security-panel h2 {
  margin-bottom: 18px;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  min-height: 52px;
  display: flex;
  align-items: center;
  padding: 12px 16px 12px 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: #26364f;
  font-weight: 760;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 17px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: inset 0 0 0 5px #d8fbf8;
}

.cases-section {
  background: var(--navy);
}

.cases-section h2 {
  color: #fff;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.case-card {
  min-height: 300px;
  padding: 28px;
  display: grid;
  align-content: space-between;
  gap: 22px;
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.07);
}

.case-card h3 {
  color: #fff;
  font-size: 1.35rem;
}

.case-card p {
  color: rgba(255, 255, 255, 0.72);
}

.case-kicker {
  color: #97f0ea !important;
  font-size: 0.9rem;
  font-weight: 900 !important;
}

.case-card.featured {
  background: linear-gradient(160deg, rgba(23, 184, 179, 0.28), rgba(201, 154, 63, 0.16));
}

.faq-section {
  background: #f5f8fc;
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.35fr 0.65fr;
  gap: clamp(30px, 6vw, 76px);
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

.faq-item button {
  width: 100%;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  border: 0;
  background: transparent;
  color: var(--navy);
  cursor: pointer;
  text-align: left;
  font-weight: 900;
}

.faq-item button span {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  position: relative;
}

.faq-item button span::before,
.faq-item button span::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--teal-dark);
}

.faq-item button span::after {
  transform: rotate(90deg);
  transition: transform 160ms ease;
}

.faq-item.is-open button span::after {
  transform: rotate(0);
}

.faq-content {
  display: none;
  padding: 0 24px 24px;
}

.faq-item.is-open .faq-content {
  display: block;
}

.faq-content p {
  margin: 0;
  color: var(--muted);
  font-weight: 610;
}

.faq-content a {
  color: var(--teal-dark);
  font-weight: 850;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-section {
  background:
    linear-gradient(176deg, #f5f8fc 0 24%, transparent 25%),
    #fff;
}

.contact-panel {
  display: grid;
  grid-template-columns: 0.86fr 0.64fr;
  gap: clamp(30px, 6vw, 72px);
  align-items: start;
  padding: clamp(34px, 5vw, 60px);
  border-radius: var(--radius);
  color: #fff;
  background:
    linear-gradient(135deg, rgba(5, 17, 38, 0.94), rgba(10, 36, 55, 0.92)),
    url("./assets/onetop-hero.png") center right / cover;
  box-shadow: var(--shadow);
}

.contact-copy h2,
.contact-copy p {
  color: #fff;
}

.contact-copy h2 {
  margin-bottom: 18px;
}

.contact-copy p {
  color: rgba(255, 255, 255, 0.78);
}

.meeting-points {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.meeting-points li {
  padding-left: 22px;
  position: relative;
  color: #f3d38a;
  font-weight: 780;
}

.meeting-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
}

.contact-telegram {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(12px);
}

.telegram-kicker {
  margin: 0;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.08em;
}

.contact-telegram h3 {
  margin: 0;
  color: #fff;
  font-size: 1.35rem;
}

.telegram-id {
  margin: 0;
  color: #9af2eb;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 950;
  letter-spacing: 0.02em;
}

.contact-telegram p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.contact-telegram .btn {
  width: 100%;
  margin-top: 8px;
}

.site-footer {
  padding: 30px 0;
  color: #fff;
  background: #050d1d;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-inner p {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.88rem;
  font-weight: 700;
}

.footer-links a:hover,
.footer-links a[aria-current="page"] {
  color: #95f2eb;
}

.btn-line {
  border: 1px solid var(--line);
  color: var(--navy);
  background: #fff;
}

.btn-line:hover {
  background: #eefcff;
}

body.inner-page .site-header {
  min-height: 68px;
  background: rgba(7, 21, 47, 0.96);
  box-shadow: 0 16px 50px rgba(1, 9, 24, 0.22);
}

.guide-hero {
  padding: 132px 0 46px;
  color: #fff;
  background:
    radial-gradient(circle at 18% 12%, rgba(23, 184, 179, 0.18), transparent 26%),
    linear-gradient(135deg, #07152f 0%, #102241 70%);
}

.guide-hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.18;
  font-weight: 930;
}

.guide-hero p {
  width: min(100%, 680px);
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.05rem;
  font-weight: 620;
}

.guide-section {
  padding: 42px 0 88px;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}

.guide-article {
  display: grid;
  gap: 18px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 42px rgba(12, 28, 54, 0.06);
}

.guide-article h2 {
  margin: 8px 0 0;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
}

.guide-article p,
.guide-article li {
  margin: 0;
  color: var(--muted);
  font-weight: 590;
}

.guide-article ol,
.guide-article ul {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 8px;
}

.guide-index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.guide-index-card {
  display: grid;
  align-content: start;
  gap: 10px;
  min-height: 168px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 42px rgba(12, 28, 54, 0.06);
}

.guide-index-card span {
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.06em;
}

.guide-index-card p {
  margin: 0;
  color: var(--muted);
  font-weight: 590;
}

.guide-aside {
  display: grid;
  gap: 14px;
  position: sticky;
  top: 96px;
}

.guide-aside nav,
.guide-cta-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.guide-aside h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.guide-aside nav a {
  display: block;
  padding: 8px 0;
  color: #26364f;
  font-weight: 760;
  border-bottom: 1px solid var(--line);
}

.guide-aside nav a:last-child {
  border-bottom: 0;
}

.guide-aside nav a[aria-current="page"],
.guide-aside nav a:hover {
  color: var(--teal-dark);
}

.guide-cta-card p {
  margin: 0 0 14px;
  color: var(--muted);
  font-weight: 590;
}

.guide-cta-card .btn {
  width: 100%;
}

.guide-list-section .section-heading p:last-child {
  margin: 12px 0 0;
  color: var(--muted);
  font-weight: 590;
}

@media (max-width: 980px) {
  .site-header {
    gap: 14px;
  }

  .site-nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .site-header.is-open .site-nav {
    position: absolute;
    top: calc(100% - 1px);
    left: 20px;
    right: 20px;
    display: grid;
    gap: 0;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    background: rgba(7, 21, 47, 0.98);
    box-shadow: 0 24px 50px rgba(1, 9, 24, 0.3);
  }

  .site-header.is-open .site-nav a {
    padding: 13px 12px;
  }

  .hero {
    min-height: 82svh;
  }

  .hero-bg {
    background-position: 62% center;
  }

  .proof-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .intro-grid,
  .product-layout,
  .security-panel,
  .faq-layout,
  .contact-panel,
  .preview-grid,
  .guide-layout,
  .guide-index-grid {
    grid-template-columns: 1fr;
  }

  .guide-aside {
    position: static;
  }

  .section-heading.compact {
    margin-bottom: 30px;
  }

  .card-grid.three,
  .case-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 28px, var(--container));
  }

  .site-header {
    min-height: 66px;
    padding: 12px 14px;
  }

  .brand {
    font-size: 1.08rem;
  }

  .brand-mark {
    width: 34px;
  }

  .hero {
    min-height: 86svh;
  }

  .hero-inner {
    padding: 110px 0 104px;
  }

  .hero h1 {
    font-size: clamp(4.4rem, 26vw, 6.8rem);
  }

  .guide-hero {
    padding: 112px 0 36px;
  }

  .guide-article {
    padding: 22px;
  }

  .hero-actions,
  .trust-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn,
  .trust-row span {
    width: 100%;
  }

  .proof-grid,
  .product-grid,
  .process-grid,
  .preview-grid {
    grid-template-columns: 1fr;
  }

  .proof-grid article {
    min-height: 108px;
  }

  .section {
    padding: 68px 0;
  }

  .issue-card,
  .product-card,
  .case-card,
  .process-grid article,
  .security-panel,
  .contact-panel,
  .contact-telegram {
    padding: 22px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}