:root {
  --patent-blue: #145a8d;
  --patent-blue-dark: #0b355b;
  --patent-blue-soft: #eef7fd;
  --patent-cyan: #4bb3d8;
  --patent-line: #dce9f2;
  --patent-muted: #607386;
}

.patent-hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 82% 50%, rgba(75, 179, 216, 0.28), transparent 19rem),
    linear-gradient(118deg, #0b355b 0%, #145a8d 58%, #1777a4 100%);
}

.patent-hero::before,
.patent-hero::after {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  content: "";
}

.patent-hero::before {
  top: -270px;
  right: -120px;
  width: 620px;
  height: 620px;
}

.patent-hero::after {
  bottom: -250px;
  left: -90px;
  width: 430px;
  height: 430px;
}

.patent-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 410px;
  align-items: center;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 48px;
  padding-block: 68px;
}

.patent-hero-copy {
  max-width: 820px;
}

.patent-kicker {
  margin: 0 0 7px;
  color: var(--patent-blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.patent-hero .patent-kicker {
  color: #9cd9ee;
}

.patent-hero h1 {
  margin: 0;
  font-size: clamp(38px, 4.3vw, 62px);
  letter-spacing: -0.04em;
  line-height: 1.16;
}

.patent-hero-copy > p:not(.patent-kicker) {
  max-width: 760px;
  margin: 18px 0 0;
  color: #dceaf4;
  font-size: 17px;
}

.patent-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 30px;
}

.patent-button {
  display: inline-flex;
  min-width: 138px;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 700;
  transition:
    transform 0.18s ease,
    background 0.18s ease;
}

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

.patent-button-primary {
  color: var(--patent-blue-dark);
  background: #fff;
  box-shadow: 0 12px 30px rgba(0, 28, 53, 0.2);
}

.patent-button-light {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.patent-hero-visual {
  position: relative;
  display: grid;
  min-height: 270px;
  place-items: center;
}

.patent-document {
  position: relative;
  z-index: 2;
  display: grid;
  width: 182px;
  height: 182px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 38px;
  background: rgba(255, 255, 255, 0.13);
  box-shadow: 0 30px 64px rgba(0, 23, 43, 0.35);
  backdrop-filter: blur(10px);
}

.patent-document svg {
  width: 118px;
  fill: none;
  stroke: #fff;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 4;
}

.patent-orbit {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
}

.patent-orbit-one {
  width: 270px;
  height: 270px;
}

.patent-orbit-two {
  width: 350px;
  height: 350px;
}

.patent-main {
  display: grid;
  gap: 32px;
  padding-top: 36px;
}

.patent-category-panel,
.patent-section {
  border: 1px solid rgba(20, 90, 141, 0.08);
  border-radius: 16px;
  padding: 38px;
  background: #fff;
  box-shadow: 0 12px 35px rgba(28, 70, 102, 0.08);
  scroll-margin-top: 112px;
}

.patent-category-panel {
  background:
    linear-gradient(135deg, rgba(238, 247, 253, 0.85), rgba(255, 255, 255, 0.9)),
    #fff;
}

.patent-section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 26px;
}

.patent-section-heading h2 {
  margin: 0;
  color: var(--patent-blue-dark);
  font-size: clamp(25px, 3vw, 34px);
  line-height: 1.25;
}

.patent-section-heading > p {
  max-width: 580px;
  margin: 0;
  color: var(--patent-muted);
  font-size: 14px;
  text-align: right;
}

.patent-category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 15px;
}

.patent-category-button {
  min-height: 142px;
  border: 1px solid var(--patent-line);
  border-radius: 12px;
  padding: 22px;
  color: var(--patent-blue-dark);
  background: #fff;
  cursor: pointer;
  text-align: left;
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.18s ease;
}

.patent-category-button::before {
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  place-items: center;
  border-radius: 9px;
  color: #fff;
  background: var(--patent-blue);
  content: "→";
  font-weight: 800;
}

.patent-category-button:hover,
.patent-category-button.active {
  border-color: #82b9d7;
  box-shadow: 0 10px 24px rgba(20, 90, 141, 0.12);
  transform: translateY(-2px);
}

.patent-category-button strong,
.patent-category-button span {
  display: block;
}

.patent-category-button strong {
  margin-bottom: 4px;
  font-size: 17px;
}

.patent-category-button span {
  color: var(--patent-muted);
  font-size: 13px;
  line-height: 1.55;
}

.patent-status,
.patent-empty {
  margin: 0;
  padding: 20px;
  border: 1px solid var(--patent-line);
  border-radius: 10px;
  color: var(--patent-muted);
  background: var(--patent-blue-soft);
  text-align: center;
}

.patent-status.is-error {
  border-color: #efd4d7;
  color: #9f2632;
  background: #fff4f5;
}

.domestic-grid,
.international-grid,
.utility-grid,
.fast-grid {
  display: grid;
  gap: 18px;
}

.domestic-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.international-grid,
.utility-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.fast-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.patent-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 100%;
  flex-direction: column;
  border: 1px solid var(--patent-line);
  border-radius: 13px;
  padding: 23px;
  background: linear-gradient(180deg, #fff, #fbfdff);
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.18s ease;
}

.patent-card:hover {
  border-color: #a7cce1;
  box-shadow: 0 13px 28px rgba(20, 90, 141, 0.1);
  transform: translateY(-2px);
}

.patent-card h3 {
  margin: 0;
  color: var(--patent-blue-dark);
  font-size: 20px;
  line-height: 1.35;
}

.patent-card > p {
  margin: 10px 0 0;
  color: var(--patent-muted);
  font-size: 13px;
}

.patent-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 12px;
}

.patent-card-tag {
  display: inline-flex;
  min-height: 27px;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--patent-blue);
  background: var(--patent-blue-soft);
  font-size: 11px;
  font-weight: 700;
}

.patent-card-definition {
  display: grid;
  gap: 9px;
  margin: 17px 0 0;
}

.patent-card-definition div {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px dashed #e5edf3;
}

.patent-card-definition dt {
  color: #788a99;
  font-size: 12px;
}

.patent-card-definition dd {
  min-width: 0;
  margin: 0;
  color: #273a4b;
  font-size: 13px;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.patent-card-definition .price-value {
  color: var(--patent-blue);
  font-size: 16px;
}

.domestic-fields {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.domestic-fields li {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px solid #edf2f6;
  color: #405466;
  font-size: 13px;
}

.domestic-fields strong {
  flex: 0 0 auto;
  color: var(--patent-blue);
  white-space: nowrap;
}

.patent-detail-button {
  width: 100%;
  min-height: 42px;
  margin-top: auto;
  border: 1px solid #8abbd6;
  border-radius: 7px;
  padding: 9px 16px;
  color: var(--patent-blue);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

.patent-detail-button:hover {
  color: #fff;
  background: var(--patent-blue);
}

.patent-card .patent-detail-button {
  margin-top: 18px;
}

.patent-guarantee {
  margin: 22px 0 0;
  padding: 15px 18px;
  border-left: 4px solid var(--patent-cyan);
  color: #416274;
  background: #f2fafd;
  font-size: 13px;
}

.patent-filter-panel {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(180px, 0.8fr) minmax(220px, 1fr) auto auto;
  gap: 14px;
  margin-bottom: 24px;
  padding: 18px;
  border: 1px solid var(--patent-line);
  border-radius: 11px;
  background: #f8fbfd;
}

.patent-filter-panel label span {
  display: block;
  margin-bottom: 6px;
  color: #607386;
  font-size: 12px;
  font-weight: 700;
}

.patent-filter-panel select {
  width: 100%;
  height: 42px;
  border: 1px solid #cfdfe9;
  border-radius: 7px;
  padding: 0 38px 0 12px;
  color: var(--patent-blue-dark);
  background: #fff;
}

.patent-filter-reset,
.patent-load-more {
  min-height: 42px;
  border: 1px solid #8abbd6;
  border-radius: 7px;
  padding: 9px 18px;
  color: var(--patent-blue);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

.patent-filter-panel > p {
  margin: 0 0 9px;
  color: var(--patent-muted);
  font-size: 13px;
  white-space: nowrap;
}

.patent-filter-panel > p strong {
  color: var(--patent-blue);
}

.patent-load-more-wrap {
  text-align: center;
}

.patent-load-more {
  min-width: 150px;
  margin-top: 24px;
}

.patent-filter-reset:hover,
.patent-load-more:hover {
  color: #fff;
  background: var(--patent-blue);
}

.fast-requirement,
.utility-note {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.patent-process {
  display: grid;
  margin: 0;
  padding: 0;
  counter-reset: patent-step;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  list-style: none;
}

.patent-process li {
  position: relative;
  min-height: 142px;
  border: 1px solid var(--patent-line);
  border-radius: 12px;
  padding: 22px 22px 22px 68px;
  background: #fbfdff;
  counter-increment: patent-step;
}

.patent-process li::before {
  position: absolute;
  top: 20px;
  left: 20px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  color: #fff;
  background: var(--patent-blue);
  content: counter(patent-step, decimal-leading-zero);
  font-size: 11px;
  font-weight: 800;
}

.patent-process strong {
  display: block;
  margin-bottom: 7px;
  color: var(--patent-blue-dark);
}

.patent-process p {
  margin: 0;
  color: var(--patent-muted);
  font-size: 13px;
}

.patent-materials,
.patent-important ul,
.patent-modal-materials {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.patent-materials {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.patent-materials li,
.patent-important li,
.patent-modal-materials li {
  position: relative;
  padding-left: 25px;
  color: #536a7c;
}

.patent-materials li::before,
.patent-important li::before,
.patent-modal-materials li::before {
  position: absolute;
  top: 0.28em;
  left: 0;
  display: grid;
  width: 16px;
  height: 16px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--patent-blue);
  content: "✓";
  font-size: 9px;
  font-weight: 800;
}

.patent-important {
  border-color: #cce3ef;
  background: linear-gradient(135deg, #eff8fc, #fff);
}

.patent-important li::before {
  content: "!";
}

.patent-modal[hidden] {
  display: none;
}

.patent-modal {
  position: fixed;
  z-index: 90;
  inset: 0;
  display: grid;
  padding: 22px;
  place-items: center;
}

.patent-modal-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: rgba(7, 25, 42, 0.66);
  cursor: default;
}

.patent-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  max-height: calc(100vh - 44px);
  overflow-y: auto;
  border-radius: 16px;
  padding: 34px;
  background: #fff;
  box-shadow: 0 28px 80px rgba(0, 21, 40, 0.32);
}

.patent-modal-close {
  position: absolute;
  top: 13px;
  right: 16px;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  color: #65798a;
  background: #eef4f7;
  cursor: pointer;
  font-size: 25px;
  line-height: 1;
}

.patent-modal-heading {
  padding-right: 45px;
}

.patent-modal-heading h2 {
  margin: 0;
  color: var(--patent-blue-dark);
  font-size: 30px;
}

.patent-modal-heading > p:last-child {
  margin: 5px 0 0;
  color: var(--patent-muted);
}

.patent-modal-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.patent-summary-item {
  border: 1px solid var(--patent-line);
  border-radius: 10px;
  padding: 15px;
  background: #f8fbfd;
}

.patent-summary-item span,
.patent-summary-item strong {
  display: block;
}

.patent-summary-item span {
  color: #7a8c99;
  font-size: 11px;
}

.patent-summary-item strong {
  margin-top: 4px;
  color: var(--patent-blue-dark);
  font-size: 14px;
  overflow-wrap: anywhere;
}

.patent-modal-section {
  margin-top: 22px;
}

.patent-modal-section h3 {
  margin: 0 0 11px;
  color: var(--patent-blue-dark);
  font-size: 17px;
}

.patent-detail-list {
  display: grid;
  margin: 0;
  border: 1px solid var(--patent-line);
  border-radius: 10px;
  overflow: hidden;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.patent-detail-list div {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--patent-line);
}

.patent-detail-list div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.patent-detail-list dt {
  color: #748796;
  font-size: 12px;
}

.patent-detail-list dd {
  margin: 0;
  color: #273b4b;
  font-size: 13px;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.patent-modal-materials {
  padding: 16px 18px;
  border: 1px solid var(--patent-line);
  border-radius: 10px;
}

.patent-modal-materials li {
  font-size: 13px;
}

.patent-modal-note {
  margin: 22px 0 0;
  padding: 14px 17px;
  border-left: 4px solid var(--patent-cyan);
  color: #4f697b;
  background: var(--patent-blue-soft);
  font-size: 13px;
}

body.patent-modal-open {
  overflow: hidden;
}

@media (max-width: 1100px) {
  .patent-category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .international-grid,
  .utility-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .patent-filter-panel {
    grid-template-columns: 1fr 1fr;
  }

  .patent-filter-panel > p {
    margin: 0;
    text-align: right;
  }
}

@media (max-width: 780px) {
  .patent-hero-layout {
    display: block;
    min-height: 0;
    padding-block: 48px;
  }

  .patent-hero h1 {
    font-size: 38px;
  }

  .patent-hero-copy > p:not(.patent-kicker) {
    font-size: 15px;
  }

  .patent-hero-visual {
    display: none;
  }

  .patent-category-panel,
  .patent-section {
    padding: 27px;
  }

  .patent-section-heading {
    display: block;
  }

  .patent-section-heading > p {
    margin-top: 8px;
    text-align: left;
  }

  .domestic-grid,
  .fast-grid,
  .patent-process {
    grid-template-columns: 1fr;
  }

  .patent-modal-summary,
  .patent-detail-list {
    grid-template-columns: 1fr;
  }

  .patent-detail-list div,
  .patent-detail-list div:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--patent-line);
  }

  .patent-detail-list div:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 560px) {
  .patent-main {
    gap: 22px;
    padding-top: 24px;
  }

  .patent-category-grid,
  .international-grid,
  .utility-grid,
  .patent-materials,
  .patent-filter-panel {
    grid-template-columns: 1fr;
  }

  .patent-category-panel,
  .patent-section {
    border-radius: 12px;
    padding: 22px 18px;
  }

  .patent-category-button {
    min-height: 0;
  }

  .patent-filter-panel > p {
    text-align: left;
  }

  .patent-modal {
    padding: 10px;
  }

  .patent-modal-dialog {
    max-height: calc(100vh - 20px);
    border-radius: 13px;
    padding: 28px 18px 22px;
  }

  .patent-modal-heading h2 {
    font-size: 24px;
  }

  .patent-detail-list div {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}